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b b & A.F.O. 5968/44 d R E ST R IC T E D (F O /? O F F I C I A L U SE O NLY) Not to be communicated to anyone outside H.M. Service ADMIRALTY FLEET ORDER AIRCRAFT AND AERO-ENGINES— PRESERVATION—REPORTS S.W .l, 9th November. 1944. Adm ir a l t y , The following Order having been approved by My Lords Commissioners of the Admiralty is hereby promulgated for information and guidance and necessary action. By Command of Their Lordships, Distribution Limited To all Commanders-in-Chief, Flag Officers, Senior Naval Officers, Captains and Commanding Officers of H .M . Ships and Vessels fitted for Aircraft, and H .M . Naval A ir Stations and Sections, and Aircraft Maintenance and Repair Yards. N o te : —The scale of d is trib u tio n is shown in th e A d m ira lty F le e t O rd e r Volume, 1941, In stru c tio n s, p a r a g ra p h 10. « ta p (69127) of “P" bra vc; (% a s+ > ^cjeJ 0 j(U ^ 5968 hfa frgoy/'tL 3 2 (v) Inspect electrical wiring, particularly w h ire leads enter junction boxes. (vi) Replenish fuel an d oil tan k s, h y d railic an d coolant system s as necessary. 5968.—Aircraft and Aero-Engines—Preservation—REPORTS (A.M.R. 1056/44.— 9 Nov. 194«) Aircraft.—Reserve aircraft which can be p u t a t si J days’ notice to fly should be p u t in a sta te of preservation in accordance witbj Appendix “ A ” an d th e following :— (i) Engines inhibited. (A.F.O. 4145/44 or A ppindix III.) (ii) Guns and cannon unloaded an d w ith signal pistols removed, cleaned. inspected, rectified as necessary, tre a te d w ith oil lubricating, G.P th in or G.S. m ineral, an d refitted in th e aircraft. C.A.F.O. 717/44 refers. I (iii) A m m unition and pyrotechnics rem oved, including those stow ed in th e dinghy, sta rter cartridges, dinghy inflation cartridge, etc. (iv) Radio equipment rem oved, other th a n fixed p arts, cleaned, inspected, tested functionally, rectified as necessary, an d stored under cover if available, otherwise reinstalled in th e a&eraft. (v) Batteries rem oved and m aintained in ; accordance w ith A .P. 1059C, Section 1. (vi) Fuel system drained if possible, otherwise com pletely filled. (C.A.F.O1787/44 refers.) (vii) Oil system norm ally filled. (viii) Coolant system filled neu tral coolant. (ix) H ydraulic system norm ally filled after com plete functional te st w ith servicing trolley. (x) Covers fitted a t all tim es to propeller, engine, cockpit, guns, p ito t tu b e pressure heads an d tyres ; removed only when necessary an d for m inim um tim e. (xi) F lying controls locked by th e devices provided in p ilo t’s cockpit. In th e open, control surfaces fitted w ith locking clamps. 2. In general, reserve aircraft should be stow ed in th e best tion available, particularly in tropical clim ates ; where this much protection as possible m ust be provided from th e direct from rain by locally constructed shelters which m ust allow round th e aircraft. M onthly— (i) Insu latio n te st on all electrical services ; te s t all electrical circuits for co ntinuity an d all lam ps fo | serviceability. (N.A.M.O. General/L.2.) (ii) T est all radio equipm ent fitted u nder norm al ground operating conditions. Quarterly— (i) Minor inspection as laid down in th e ap propriate Inspection Schedule am ended as necessary to m eet local requirem ents. (ii) F lig h t te st an d functional te st of all e q u ip m e n t; renew all a n ti­ corrosive trea tm e n t as necessary. Note.— A ircraft em barked in stored condition are to be m ain ­ tain ed in accordance w ith N.A.M.O. General/G.2. 6. Cased Aircraft and Components.— Stow packing cases on close an d evenly spaced supports well clear of th e ground. I n tropical clim ates, brick, stone, concrete or other m aterial n o t liable to ro t or insect a tta c k should be used a n d th e air space should be as large as possible. P recautions m ust be tak en to prev en t supports sinking in to th e ground. 7. I n conditions of high hum idity rem ove h an d hole covers a t case ends and sides to increase v entilation ; in th e open th ef en try of rain m u st be prevented by covering these openings w ith gauze or by rigging awnings. 8. In tropical clim ates, cased aircraft, an d com ponents necessarily stowed in th e open m u st be provided w ith locally constructed shelter against sun an d rain. 9. Periodic Inspections :— hangar accom m oda­ cannot be done, as rays of th e sun an d free air circulation Weekly— (i) Inspect cases for signs of ro t or dam age, security of covers and sinking of supports. I n tropical clim ates, keep vegetation clear of th e bottom an d sides of th e case. M onthly— (i) Open cases sufficiently to inspect contents w ithout necessarily d istu rb ­ ing th em an d to inspect inside of case for m ould grow th an d other indications of dam p an d deterioration. (ii) I f signs of deterioration are found, rem ove contents of case, rectify as necessary an d retrea t w ith preservative as detailed in A ppendix II. (iii) Replace gear an d resecure cases ; see th a t ventilation holes are clear. 3. W here adequate shelter cannot be’ provided, aircraft m ust be properly picketted on hard standing, generally in accordance w ith A .P. 1464, Volume I, P a rt 8, Section 1, C hapter 2. W ings m ust be spread and locked. 4. In tropical clim ates aircraft should, be trestled w ith th e wheels clear of the ground to preserve the tyres (pressures reduced to ab o u t 10 lb./sq. in.) an d to allow full operation of all hydraulic services. 5. Periodic Inspections :— D aily— (i) Check securing gear and covers for correct position and security. (ii) Inspect aircraft externally for signs of deterioration an d dam age. (iii) Cheek visually th a t tyres are properly inflated an d th a t oleo leg pressures are correct (except trestled aircraft). (iv) Check position of the propeller on aircraft w ith engines inhibited to see th a t it has n o t been turned. W eekly— (i) R un engine if n o t inhibited. (ii) O perate hydraulic an d pneum atically-operated services (except u n d er­ carriage on untrestled aircraft), flying controls an d propeller pitch control mechanism. (iii) Check ty re and oleo pressures b y gauge. (iv) Thoroughly inspect aircraft inside and o u t for signs of dam age, deterioration a n d corrosion; rectify as necessary. Renew a n ti­ corrosion preservatives as necessary. 5968 Quarterly— (i) Rem ove contents of all cases, inspect thoroughly, rectify faults and renew preservative as necessary. (ii) E m body outstanding modifications for w hich p arts are obtainable. 10. A ircraft and Component Cases.— Slinging eyes, rings an d sim ilar fittings are to be p ro tected against ru stin g w ith an ti-ru st p ain t or grease, G.S. Ref. 34A/4. 11. E m p ty cases (other th a n engine a n d pow er p la n t cases) should be shaken an d th e sections stow ed flat on top of each other, separated an d clear of the ground by close an d evenly spaced tim b er supports. In tropical clim ates p ro tect case section stacks against sun an d rain by locally constructed shelters w hich perm it free air circulation round th e sections. 12. Engines.-—B ritish engines which can n o t be ru n every seven days are to be inhibited in accordance w ith A .F.O . 4145/44. 13. A m erican engines installed in aircraft which cannot be run every seven days are to be inhibited in accordance w ith A ppendix I II . A merican engines not installed in aircraft are to be inhibited in accordance w ith A .F.O . 4145/44. (C9127) 5968 4 14. Engines installed in reserve aircraft are to be reinhibited a t m inim um intervals of six m onths in tem perate clim ates an d three m onths in tropical climates. 15. Engines n o t installed in aircraft (except as detailed in paragraph 16) are to be reinhibited a t m inim um intervals of tw elve m onths in tem perate clim ates and six m onths in tropical clim ates. 10. Am erican engines in pliofilm bags an d B ritish engines in m etal lined sealed cases should n o t be disturbed u n til th e hum idity indicator shows th e presence of excessive m oisture. Then, th e leak in th e container m ust be located an d repaired, th e silica-gel renewed or reactivated by drying in an oven, an d th e container resealed in as d ry an atm osphere as possible. I f th is cannot be done th e engine is to be inhibited in accordance w ith A.F.O. 4145/44. 17. In tropical clim ates, engines an d power plants m u st be stow ed under cover. In tem perate clim ates th ey m ay be stow ed in th e open only if th ey are in w eather­ proof cases which should be p rotected against w eather by ta rp au lin an d supported well clear of th e ground. 28. Preservation of Dismantled Propellers :— T reatm ent 22. To rem ove th e engine from th e new type case, rem ove th e four n u ts from th e securing bolts, remove th e b attens, taking care to avoid dam aging th e bolt seals, and lift th e engine on its stan d o u t of th e lower p a r t of th e case. 23. E m p ty engine and power p la n t cases m ay be stow ed in th e open provided th e inside is protected from the w eather and k ep t dry. E m p ty m etal lined cases need n o t be resealed, b u t th e flanges of th e m etal lining m u st be protected by light wooden b atten s nailed along th e sides an d ends, when cases are to be transported em pty. All fittings an d com ponents of the case m ust be fitted in th eir proper location when cases are despatched. 24. Propellers.—All propellers cased or otherw ise are to be checked on receipt for completeness, exam ined for signs o f corrosion or dam age and rectified as necessary. 25. Propellers stored in a dism antled condition m u st be restow ed in th eir correct ty p e packing case and stored under cover, particu larly in tropical climates. I f stored in an assembled state, th e y m u st be stow ed u n d er cover on suitable racks w ith th e w eight taken by th e hub, and th e hub covered to exclude d u st and dirt. 26. Before stowing, propellers are to be tre a te d w ith preservative as detailed at paragraphs 28 or 29 as appropriate. 27. M onthly inspection of propellers is to be m ade for signs of corrosion or dam age an d faults are to be rectified. A ny outstanding m odifications for which p arts are obtainable are to be em bodied a t th a t tim e. E lectrically operated propellers S pray w ith inhibitor fluid. Ref. 33C/777. In terio r of hub assembly working p arts. In terio r of dome assem bly, p A pply w ith b ru sh Lanolin resin solution D .T.D. 663, Ref. 33C/924. E x terio r of hvib (un- E x terio r u n p ain ted p a rts o f hub, cone seats, pain ted p arts), eone splines, threads. seat, splines, threads. E x terio r of dome a s ­ E x terio r of m o to r and reduction gear assembly sem bly if unpainted. including driving bevel U npainted p a rts o f root wheel. end o f b la d e s ; from shank to end including U n p ain ted p a rts of blade ro o t en d including bevel operating p i n ; after gear, a fte r bearings have bearings have been been packed w ith grease. p acked w ith grease. U npainted m etal blades. U n p ain ted m etal blades. A pply Lanolin resin solu­ tio n D .T.D . 663, Ref. 33C/924, b y dipping, spraying or brushing. Cylinder group. Piston. In n er an d ou ter oil tubes. Spinner support plate. Slip ring housing. Sup­ pressors (threads only). E x te rn a l m etal p a rts of harness. A pply L anolin resin solu­ tio n D .T.D . 663, Ref. 33C/924, b y dipping, spraying or brushing. S haft n u t. E x tra c to r n u t. F ro n t cone. Split pins. Loose n uts, bolts, etc. Shaft n u t. E x tra c to r n u t. F ro n t cone. Seeger circlips, etc. 19. The d ate when th e engine was last inhibited is to be clearly an d perm anently m arked on th e outside of th e case or on a securely attach ed ro b u st label on uncased engines. 21. To unseal th e new ty p e m etal lined case, remove all vertical m etal work from th e lower p a rt of th e case, te a r off sealing strip from sealed jo in t in accordance w ith th e stencilled instructions on th e case, rem ove lower h alf of locating tongue, bend lapped seam a t right-angles to th e case side around th e perim eter a n d remove upper p a rt of th e case, taking care n o t to dam age th e m etal lining. Note.— The overlapping joint is n o t soldered an d should be broken m erely by lifting th e upper p a rt of th e case. A sharp tool m ust n o t be used as th is will dam age th e lining. L 1 H ydraulic o perated / propellers | 18. U ncased engines m ust be protected b y dust covers a t all tim es when work is n o t actually being carried out on th e engine. 20. Engine and Power P lant Cases.—New ty p e w eatherproof packing cases for engines and power plants are m ade of tongued an d grooved boarding, lined w ith roofing felt, th e roof reinforced w ith 3-ply an d th e case edges arm oured. T he jo in t betw een th e tw o p a rts of th e case is m ade w ater-tight w ith jointing com pound 33C/922 which is plastic and need not be renewed every tim e th e case is opened b u t should be rem oulded to form a sealed joint. 5968 5 H arness term inals. C oat w ith m ineral jelly, Ref. 33C/513. Enclose in greaseproof pap er envelope and se­ cure all openings. Com plete hub or hub and dom e assemblies. R oot ends of blades. Com plete h u b assembly, less m o to r an d reduction gear. R o o t ends of blades. M otor an d reduction gear. Store w ith electrical equip­ m ent. W rap in greaseproof paper an d secure along w ith appropriate propeller. — P iston, cylinder, oil tubes, spinner support, n u ts an d cones, etc. Slip ring housing. S up­ pressors. H arness. N uts, cones an d circlips. 29. Preservation of Assembled Propellers.— (i) Rem ove one blade, sp ray interior o f hub w orking p a rts w ith inhibitor fluid, Ref. 33C/777, an d replace blade. (ii) Spray interior of dom e assem bly (hydrom atic propellers) w ith inhibitor fluid an d assemble dome to propeller. (iii) Coat external exposed m etal p arts, including splines, cone seats and threads, w ith Lanolin resin solution, R ef. 33C/924. (iv) W rap hub w ith grease-proof pap er to exclude d u st an d dirt. 30. Arm am ent Equipment.-—All arm am en t equipm ent rem oved from aircraft for storage is to be tre a te d an d sto red as follows :— (i) Guns.—L ubricate w ith oil 6 .P ., th in , Ref. 34A/12, or G.S. m ineral. Label w ith aircraft num ber an d position. Stow in gun chests or racks. (ii) F iring u nits.—B lank off end of pneum atic pipe lines. Stow in cupboards. 5968 6 (iii) Signal pistols.—L ubricate w ith oil, G .P., th in j or G.S. m ineral. Stow in cupboards. (iv) A m m unition chutes and tanks.— L ubricate w ith oil, G .P., th in , or G.S. m ineral. Stow in bins. I (v) Bomb racks and torpedo carriers.—Coat all tpreads an d unp ain ted p a rts except release slips w ith Lanolin resin sqlution, Ref. 33C/924. Coat release slips w ith m ineral jelly. Stow in Hicks. (vi) R .P . installations.— Coat u n painted p a rts frith L anolin resin solution except b la st tubes. Coat b la st tubes w ith oil, G .P., th in . Stow in racks. (vii) American bomb racks and shackles.—I f already tre a te d b y Am erican process w ith “ T etryl ” , store as received^ otherwise tre a t as for B ritish bom b racks. E lectrical p a rts to rem ain!untreated. Stow in racks. (viii) Gun sights.—Stow in suitable boxes on racks. 31. Periodic Inspection.— Weekly.—Inspect guns for corrosion if fired p rio r to being placed in storage. Fortnightly.—Inspect gun sights for deterioration or dam age. M onthly.— Inspect guns, signal pistols, am m unition chutes an d tanks, bomb racks, torpedo carriers and R .P . installations for corrosion o r dam age an d rectify as necessary. 32. Radio Equipm ent.—All radio equipm ent rem oved from aircraft is to be cleaned, tested functionally, and stow ed in clean, w eatherproof, w ell-ventilated accom m odation. U nits are to be stow ed on shelves w ith an air space o f a t least 3 in. betw een units. The lowest shelf m u st have a m inim um floor clearance o f 6 in. No equipm ent is to be stow ed on th e floor. 33. W eekly inspection is to be m ade o f all equipm ent for signs of condensation ; an y present is to be rem oved b y thoroughly drying o u t th e unit, an d all possible action tak en to prevent fu rth er condensation occurring. 34. E quipm ent containing vacuum tubes is to be ru n u p on th e bench on “ filam ents only ” for a t least tw o hours prior to re-use. 35. Instrum ents.— All instrum ents received for storage, w hether in a ir tig h t containers o r otherwise, are to be passed to th e instrum en t shop for inspection, calibration and te st. 36. W hen passed as serviceable an d free from corrosion, th e y are to be w rapped in grease-proof paper, placed in a plio-film bag containing silica-gel, an d sealed before being stow ed. Plio-film bags m ay be m ade u p from m aterial o btained from discarded A m erican engine bags, w hich can be sealed b y application of a w arm iron (sealing tem perature is 325° F . to 350° F .). In stru m en ts are to be stow ed in racks. B in stow age is n o t to be used. 37. B lind flying panels w ith all instrum ents properly positioned are to be stow ed in sealed plio-film bags. The anti-vibration m ountings m u st n o t be u nder load. 38. Flexible drives are to be stow ed stra ig h t w hen possible b u t if coiled, a radius o f n o t less th a n 9 in. is to be used. 39. Compasses are to be stow ed in th e tra n sit cases in w hich th e y are supplied an d k ep t in a norm al a ttitu d e so th a t m agnets are free to ro tate. T he stow age m u st be clear o f m agnetic fields of generators, degaussing rings, etc. Compasses rem oved from aircraft are to be clearly an d indelibly labelled w ith th e serial num ber o f th e aircraft and th e position from w hich removed. Note.—I f air-conditioned storage is available, sealing in plio-film bags is n o t necessary. 40. Despatch of Aircraft fo r Packing or Shipm ent.— Before despatching an aircraft for packing or shipm ent th e following is to be carried o u t :— The inspectional sta te is to be as laid down in A.F.O . 4594/43 unless approval of higher au th o rity is obtained : (i) Clean aircraft thoroughly inside and o u t and rem ove an y corrosion. (ii) R epair or replace any dam aged or broken parts. (iii) Check aircraft for com pleteness to stan d ard checking list and see th a t all equipm ent is properly stow ed and secured. 7 5968 (ivj F it new d ry batteries of a ty p e m arked f overseas ” or “ suitable for use in tropical clim ates ” if existing b atteries are m ore th a n six m onths old b y d ate of m anufacture or are n o t |o m arked. F ully charge and fit electric accum ulators. (v) In stall all guns an d cannon, an d line up. T est synchronized guns on stop b u tts. Test all gun firing control mechanisms. (vi) Rem ove all am m unition an d pyrotechnics, including those stow ed in th e dinghy. N ote.—I f th e aircraft is transferred b y air, sufficient am m unition and pyrotechnics for th e delivery flight are to be placed in aircraft, and th e pilot w arned th a t he m ust rep o rt th e presence of any such item s to th e Packing Centre on arrival. A n o tatio n is to be m ade in th e aircraft’s F o rm A.700, showing th e q u an tity an d location of all am m unition or pyrotechnics. (vii) See th a t Am erican aircraft w ith “ F lyaw ay ” oil in th eir systems have th e label in th e cockpit and entries in th eir log cards called for a t p aragraph 1 (xiv) an d (xv) of A ppendix I II . (viii) To avoid accum ulation of fuel a t packing centres, leave th e m inim um am o u n t of fuel in th e aircraft’s ta n k s com patible w ith safety of flight. I f despatched b y road all fuel tanks are to be em pty. 41. Preparation of Aircraft fo r Embarkation in Aircraft Transports or Carriers fo r Passage only.—A ircraft to be em barked are to be p u t into a serviceable condition as laid down a t p aragraph 40 (i) to (v). In addition th e following is to be carried o u t :— (i) In h ib it engine as laid down in A .F.O . 4145/44 or A ppendix I I I of th is Order. (ii) D rain fuel system com pletely. Replace filler caps an d drain plugs. (iii) U nload all guns an d cannon an d remove all am m unition and pyrotechnics from th e aircraft including those stowed in th e dinghy. (iv) Preserve guns, cannon and signal pistols in accordance w ith C.A.F.O. 717/44, p aragraph 7 (ii). (v) T reat R .P . gear as follows :— (а) B lank off all electric sockets w ith blanking caps or gum p atch. Ref. 32B/612. (б) W rap th e 5-pin plug w ith gum patching and tie securely against m ovem ent to ad jacen t tube. (c) Coat all exposed m etal p a rts w ith Lanolin resin solution, R ef. 33C/924 or 923, including b last tubes. (vi) Coat all un p ain ted p a rts of bom b and torpedo gear (except release units) w ith Lanolin resin solution. F it all electric plugs in th eir respective sockets, or tie securely to ad jacen t m em ber, an d blank off sockets w ith blanking caps or gum patch. Coat quick release u nits w ith m ineral jelly. (vii) Rem ove all radio sets, an d pack in correct ty p e tran sit cases. Place a bag of silica-gel in each case an d seal case lids w ith bitum inous com pound. R ef. 33C/805. Note.— Q u an tity of silica-gel to be used is 4-oz. p er cu. ft. of case capacity. (viii) Top u p oil system w ith stan d ard oil or “ Flyaw ay ” oil as necessary. (ix) Check coolant for acidity. Top u p, or drain an d refill w ith n eutral coolant as necessary. (x) Top up hydraulic system . (xi) Coat exposed m etal p a rts of all loose equipm ent (other th a n radio or arm am ent) stowed in th e aircraft w ith Lanolin resin solution, Ref. 33C/923 or 924. (xii) A pply preservatives to all p a rts of aircraft as detailed a t column 2, A ppendix I I , o f th is Order. (xiii) Secure flying control by devices fitted in cockpit. F it all external covers, including ty re covers, and fasten securely. F it control surface locking boards. Note.—Tyre covers are to be m ade from local resources until th ey are supplied. They are to bo as tig h t fitting as possible. 5968 9 8 (xiv) E n te r on .Form 700 and log cards details of action tak en to place aircraft in sta te of preservation. Note.— 1. All log cards, Form s 700, vouchers, etc., pertaining to each aircraft are to be handed over to th e Air E.O . of th e carrier or Officer-in-Charge of aircraft aboard aircraft transports. Note.— 2. A ircraft are to be m aintained on board in accordance w ith KAMO. General G/2. 42. Receipt of Cased Aircraft Abroad.— On receipt of cased aircraft abroad the following action is to be taken :— [а) I f aircraft is to be held in an erected condition—(i) Carry out erectiijn a t onee. (ii) Rectify and remove an y faults or corrosion found during erection, (iii) F light te st aircraft and after satisfactory com pletion of te s t store as laid down a t paragraphs 1 to 5 of th is Order. (б) I f aircraft are to be held in a cased condition— (i) W ithdraw airfram e from its case, on th e cradle to w hich it is attached, an d remove all com ponents from th eir cases. (ii) E xam ine thoroughly an d com pletely, th e aircraft and com ponents (including engine if installed) for corrosion and dam age an d rectify as necessary. (iii) Renew all preservative m aterials rem oved, using those detailed a t colum n 3, A ppendix I I of this Order (re-inhibit engine if installed). (iv) Re-stow airfram e and com ponents in th e cases an d in th e position in which previously packed. (v) Transfer radio equipm ent, propeller, an d separately packed in stru ­ m ent boxes to their appropriate section for storage in accordance w ith th is Order. A lternatively, if proper storage facilities do n o t exist, re-stow these item s in th eir respective boxes after inspection, rectification and re-treatm en t as necessary. Renew or re-activate silica-gel in sealed boxes an d re-stow boxes in packing cases from which th ey were taken. (vi) Re-secure all cases, and store as detailed a t paragraphs 6 to 10 of this Order. Note.—Cased aircraft are accom panied b y a box containing small fittings, n uts, bolts, etc., rem oved during dism antling for packing. The box is secured in one of th e m ain packing cases. Such loose lines are to be exam ined for corrosion on receipt, b u t m u st be replaced in th e box and rem ain w ith th e aircraft to which th ey belong u n til used in erection These assem bly-parts boxes m u st n o t be robbed to service other aircraft, except a t th e discretion of th e Air E .O ., an d item s tak en th en m u st be m ade u p as soon as replacem ent p a rts dem anded are obtained. 43. Special Reports.— Special reports are to be m ade in full to th e A dm inistra­ tion A u thority and repeated to A dm iralty on th e following points :— (i) D eterioration of reserve aircraft, due to local conditions, or lack of or ineffectiveness of preservative trea tm e n t, etc. (ii) Poor condition of aircraft a t tim e o f receipt, w hich could have been prevented b y b e tte r preservative tre a tm e n t or packing. (iii) Any local m ethods which have proved effective in overcoming d eterio ra­ tio n of reserve aircraft. (iv) Construcitve criticisms o f preservative trea tm e n t, packing m ethods or case design. 44. R eports should contain full details to enable all action to be tak en and full investigation to be carried out. The details required are :— (i) Serial No. of aircraft and/or engine. (ii) N ature of defect and full description of p arts affected, w ith p a rt and reference num ber. (iii) D ate of receipt, or period since aircraft was last flown. (iv) D ate of last inspection or preservative treatm en t. (v) N ature of storage condition, i.e., erected, cased, in open, in hangars, etc., or m ethod of delivery. (vi) N um ber of aircraft or engines affected. 5968 A ppendix I L ist o f Preservatives Name Specification Inhibitor fluid Stores Ref. Application Remarks D.T.D.587 33C/777 Special spray gun and Not necessary to remove, nozzle, Ref.4A/1261. except accumulation in engine cylinders, which should be drawn off by syringe before starting up. — 34A/180 Used as engine lubri­ Drain off while hot. cant. 33C/923 or 33C/924 Brush dip spray Wash off with paraffin, from standard paint. Grade A, or white Spray gun. spirits. Rust preventive ... D.T.D.121D 33C/527 Brush dip or spray... Wipe off with clean cloth or wash off in paraffin or white spirits. Pigmented Lanolin D.T.D.279B 33C/584 Brush or dip. Must See footnote. not be sprayed. Flyaway oil (British Lanolin resin solu­ D.T.D.663 tion. Lanolin grease Grease G.S. -- Mineral jelly D.T.D.55 Bituminous sealing compound. — Plastic sealing com­ pound. 33C/511 Smear (apply warm Wipe off or wash with in temperate cli­ white spirits or para­ mates). ffin. 34A/4 Smear 33C/513 Smear (or hot dip) Wipe or boil in clean when combined with water if mixed with beeswax. beeswax. 33C/805 Brush warm, or smear Not necessary. (Used for sealing ease joints.) 33C/922 Apply by hand and Not necessary. Used for mould to shape to sealing weatherproof fill joint. engine cases. May be remoulded by hand. Will stay plastic. .............. Wipe off or wash in paraffin. Gum patch — 32B/612 Apply by hand. (Form Strip off by hand. of adhesive tape.) Greaseproof paper — 32B/402 Wrap E.6/182 Place in linen bags. N.A. (Used in sealed cases to absorb moisture.) 34A/12 Smear Silica-gel Oil, G.P., thin ... — N.A. .............. Wipe. Note.—Pigmented Lanoline 33C/584 contains chromate pigment which is dangerous to health and to the skin. Use of this substance on aircraft is being discontinued. Use white spirits, or brush-wash to remove. Do not hold swabs in the hand. Use mops or brushes. r11 10 5968 A ppendix I I Application of Preservative To Aircraft Preservative and when to apply Parts I Erected airErected air­ f craft stored craft stored i in open or for in hangars i shipment by sea transport . l> . 33C/511 1 Exposed metal parts of radio and electrical fittings 34A/4 J Cockpit control chains and sprockets 34A/4 1 All control rods and cables ......................... Cockpit hood lock and release gear ... Safety harness lock and release gear Emergency release mechanisms Seat attachment fittings .............. 34A/4f Control surface hinges ... Rudder bar pivots and adjusters Undercarriage and tail oleo sliding struts Hydraulic jack rams and locking pins Undercarriage locking gear .............. 33C/527 Wing root end fittings and locking pins 33C/§24 Exterior of engine including propeller-shaft if propeller is removed 33C/|>27 Metal propeller blades (unpainted) ... 33Cj»27 All exposed metal parts on power plant 33C/527 Interior of spinner ......................... 33(f527 Unpainted parts of propeller hub Interior of engine cowlings .............. 33C/527 Jettison fuel tank fittings Joint faces of wing and airframe detachable portions Fairing attachment screw holes .............. Radio maste Brake drums of wheels when removed for storage or transit 33C/527 Bomb and torpedo attachment fittings See jD.A.F.Os. R.P. gear .................................... Guns, cannon and signal pistols ... !■ 717/44 and ? 21/44 Bomb racks ... ... ... ... J ; N.A. Interior of metal main planes, wing tips, and gun welis (sprayed through openings) N.A. Interior of metal tail plane, rudders, detach­ able rear ends, when removed for packing Cased aircraft in storage and during transit 33C/511 33C/511 34A/4 33C/924 34A/4 33C/924 34A/4 34A/4 33C/927 33C/924 33C/924 33C/924 33C/527 33C/924 33C/527 33C/527 33C/527 33C/924 N.A. 33C/924 33C/924 33C/924 33C/924 33C/527 33C/924 33C/924* N.A. 33C/924 H.A. 33C/924 33C/924 33C/924 33C/924 See C.A.F.Os. 717/44 and 721/44 33C/527 33C/924 See C.A.F.Os. 717/44 and. 721/44 33C/527 N.A. 33C/527 Note.—Preservative or grease is not to be applied to any part of the oxygen equipment which is to be masked before any treatment is applied to any parts in its vicinity. If lubrication is required, dry graphite (blacklead) powder may be sparingly used. 5968 A ppendix I I I Preservation of Am erican Aero-Engines in sta lled tn N aval Aircraft 1. Am erican engines in aircraft w hich cannot be ra n every seven days are to be tre a te d as follows :— (i) I f th e oil system does n o t already contain f F lyaw ay ” oil, com pletely d rain th e oil system , including th e coolerstt and refill w ith “ Flyaw ay ” oil, Ref. 34A/180. (ii) R u n engine for 15 m inutes a t an oil inletf tem p eratu re of 95-105° C., using norm al approved fuel. I f necessary oil coolers m ay be blanked off or by-passed to o b tain th is tem peratiire. (iii) Stop engine, an d while still h o t, drain oil from engine b y rem oving sum p d rain plugs. Leave d rain plugs o u t un til engine is eool. Rem ove all sp ark plugs. Rem ove rocker covers from engines w ith o u t pressure lubricated rocker gear. Do n o t drain “ F lyaw ay ” oil from oil tan k . (iv) U sing spray ap p aratu s, Store Ref. 4A /j261, thoroughly sp ray exhaust valves w ith inhibitor fluid, Ref. 33C/777, th ro u g h th e sp ark plug holes w ith exhaust valves open. (v) On engines w ithout pressure lubricated roeker gear, thoroughly spray all rocker box p a rts w ith in h ib ito r fluid. (vi) R o ta te crankshaft a t least 4 revolutions to w ork inhibitor fluid into exh au st valve guides. (vii) W ith each piston a t b o tto m dead centre in tu rn , spray interior of cylinders th ro u g h spark plug hole w ith inhibitor fluid in q uantities q uoted below, tak in g care to cover all interior surfaces. Q u an tity of inhibitor fluid' to be used is :— P r a tt an d W hitney engines ... ... 12-14 c.c. per cylinder. W right engines ... ... ... ... 15-20 c.c. per cylinder. Scarab engines ... ... ... ... 4r- 5 c.c. per cylinder. Lycom ing engines ... - ... ... 4 - 5 c.c. per cylinder, (viii) W ith o u t fu rth er tu rn in g o f crankshaft, sp ray th e inside o f each cylinder again, using h alf th e q u a n tity o f inhibitor fluid quoted a t su b -p ara­ g raph (vii). The crankshaft m ust not be rotated after this operation. (ix) W hen obtainable, fit d ehydrator plugs, P a r t No. AN-4062, tig h tly in all sp ark plug holes, an d plugs, P a r t No. AN-4061, in crankcase sum p otherw ise refit sta n d ard blanking plugs. Replace rocker covers where these have been rem oved. W here d eh y d rato r plugs have been used, secure norm al sum p plug to th e sum p w ith locking wire. (x) Place a m inim um of \ lb. b ag of silica-gel in each ex h au st ou tlet an d in th e air intake scoop. Seal these openings w ith suitable airtig h t covers well secured w ith adhesive tape. A ttach th e siliea-gel bags to the covers to ensure rem oval w hen these are tak en off. (xi) In h ib it carb u retto rs as follows :— (а) Stromberg injection carburettor.— In accordance w ith Leaflet A .P. 2152A/6-W , p arag rap h 4. (б) Stromberg float type carburettor.— No inhibiting required. (c) Holley carburettors.—D isconnect fuel lines to ca rb u re tto r and install suitable nipple in th e ca rb u retto r fuel inlet connection. Intro d u ce oil D .T.D . 44D, Ref. 34A/43, or 141 (or if this is n o t available, oil, Ref. 34A/123 or 152) into th e carburettor, th ro u g h th is nipple, to flood all fuel passages com pletely. Rem ove drain plugs in b o tto m of carb u retto r and flush through w ith oil several tim es. F in ally d rain ca rb u re tto r of oil, replace d rain plugs, m ake all connections an d lock. (xii) Using p a in t sp ray gun, sp ray com plete exterior of th e engine w ith Lanoline resin solution, Ref. 33C/924 or 923. Note.—Lanoline resin solution is inflammable w hilst being sprayed an d has a slightly toxic effect. Suitable precautions are to be taken, (xiti) In sta l cowlings an d engine covers an d securely fasten. (xiv) Place a d ate notice in th e cockpit to sta te “ th e oil system of th is aircraft (No.) contains “ F lyaw ay ” oil, Ref. 34A/180. This notice is to be readily visible when seated in th e cockpit b u t placed so th a t it m ay be left in position during flight w ithout inconvenience to th e pilot. The notice is n o t to be removed, u n til the oil system has been cleared o f “ F lyaw ay ” oil. 5968 12 (xv) Place a notice on th e propeller in a prom inent position to sta te “ E N G IN E IN H IB IT E D . DO NOT T U R N P R O P E L L E R ” . (xvi) Make suitable en try in Engine and Airfram e Lpg Cards to sta te th a t oil system has been filled w ith “ F lyaw ay ” p il an d quoting d ate of inhibiting in engine log. 2. Preparation fo r Delivery Flight.—Reserve aircraft whose engines have been trea ted as detailed a t paragraph 1 which are required forjdelivery b y air are to have th eir engines prepared as follows :— (i) Rem ove ail dehydrator plugs, drain plugs, flan k in g covers an d bags of silica-gel. (ii) P repare carburettors as follows :— (a) Stromberg injection carburettors.— R em o te blanking plugs from fuel inlet, th e fuel strainer and drain pli^g a t th e side of fuel control u nit. D rain off inhibitor oil. Replace drain plug an d strainer and connect up th e fuel supply pipe.; (t>) Holley carburettors.—No action required, fcarburettors are drained of oil afte r initial inhibiting. Note.— C arburettors are to be prim ed w ith fuel an d allowed to stand a t least eight hours before running; the engine. (iii) U sing suitable syringe or hand pum p w ithdraw as m uch as possible of inhibitor fluid from each cylinder throug h spark plug hole. P iston should be a t T.D.C. for this operation. (iv) R o ta te engine slowly by han d a t least fo4r revolutions of propeller in norm al direction of ro tatio n w ith spark plugs or dum m y plugs in position. (v) R epeat operation (iv) w ith spark plugs removed. (vi) Rem ove inlet elbows of tw o lower cylinders on single b an k engines, and five lower cylinders on double bank engines, an d d rain oil or inhibitor fluid collected therein. Replace an d secure inlet elbows. (vii) F it spark plugs securely and connect u p ignition. F it all d rain plugs and lock in place. (viii) P repare engine for flight in norm al m anner, b u t do n o t d rain system of “ F lyaw ay ” oil and do n o t rem ove notice from cockpit indicating “ Flyaw ay ” oil is in use. (ix) E n te r in log cards “ Engine prepared for flight using ‘ F lyaw ay ’ oil ” . 3. Preparation fo r Service.—Before placing an aircraft in which “ F lyaw ay ” oil is in use, into general service, th e following procedure is to be carried o u t :— (i) I f th e engine has been inhibited as detailed a t p aragraph 1 of this A ppsndix proceed as for p reparation for delivery flight a t p arag rap h 2, sub-paragraphs (i) to (vii). (ii) D rain “ Flyaw ay ” oil from oil tank, pipelines an d oil coolers an d refill w ith clean lubricating oil of approved grade. (iii) R un engine for 15 m inutes a t oil tem perature of 95° to 105° C. (iv) Rem ove notice from cockpit sta tin g th a t system contains “ F lyaw ay ” oil. (v) Make e n try in log cards th a t oil system has been drained of “ F lyaw ay ” oil and refilled w ith approved grade oil. 4. I f aircraft has been delivered by air using “ F lyaw ay ” oil an d is to be p u t into im m ediate use, proceed as follows :— (i) R un engine for norm al w arm ing up period, and drain “ Flyaw ay ”, oil from engine and oil system including radiators. (ii) R efit drain plugs an d fill oil system w ith clean lubricating oil of approved grade. (iii) Proceed as detailed a t paragraph 3, sub-paragraph (iii) to (v). Note.— “ F lyaw ay ” oil has been introduced under Stores Ref. 34A/180. This oil contains "25 per cent, inhibitor concentrate and is of high viscosity. I t m ay be used in reserve aircraft for flight te st or delivery flights n o t exceeding five hoiirs to ta l flying, b u t m u st n o t be used on general or operational flights. Oil dilution m ay be used in th e norm al m anner. The same oil m ay be used again once only, provided it has been drained direct from th e aircraft in w hich previously used into clean oil drum s th ro u g h a fine m esh filter. (G.A.F.Os. 717/44, 721/44, 1787/44 and A .F .O s. 4594/43, 4145/44.) (69127) Wt. 8092/2356 13.000 11/44 Hw. G.338/10.