Duringinstallationof flexiblehoseassemblies,considerthe followingprecautions:
(1)
Assurethe hose is not twisted. High pressuresappliedto a twistedhosecancause failureof the hoseor looseningof the B-nut.
(2)
Do not attemptto straighten a hose havinga bend in it as this could result in damageto the hose. Rubberhoseswill take a permanentsetduringextendedserviceperiods.Careshouldalsobetakenduringremovaland reinstallationof suchhosesto assure they are not bentexcessivelyand that theyare returned to their originalposition.
(d)
AcrylicWindows
(1)
Perform inspection per Chapter 56 of the Maintenance Manual (p/n 761-852).
(e)
LandingGear
(1)
Inspect main landinggear inboard door hinges for cracks, usinga dye penetrant methodof inspection.
10. 1,200Hour
(a)
LandingGear Nose Left Right
(1)
Inspectnoseand main landing gearupperbearingblockretaining pins.
11. 1,400Hours
(a)
LandingGear Nose Left Right
(1)
Replace top cylinder bolts, P/N 401 195.
12. 1,500 Hour
(a)
Engines(PT6A-61) Left Right
(1)
PerformHot Section Inspection (HSI) in accordance with the latest Pratt & WhitneyServiceBulletinNo. 13303.
NOTE: All PT6Aenginesmay be operatedto a scheduledhotsectioninspectionintervalor
alterantively,theHSIfrequencymaybe based on engine performance
trend monitoring.Iftrendmonitoringisintroducedpartwaythroughenginelife,compressorwashandhot section inspectionmust be accomplished performance
toestablished baseline. RefertoPratt& Whitney Agtoil23 for detailson trend monitoring.
EFFECTIVITY: 040-999
5-50-00 PAGE
5-50-00 Feb 1/98
PIPERAIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCEMANUAL
A. Special Inspections (continued)
12. 1,500Hour (continued)
(b)
Landing Gear
Nose Left Right
(1)
Replacemain landing gearbrace,pivotshaftassembly,P/N 43286-02.
13. 2,000 Hours or Two Years, (whichever comes first)
(a)
Fuel System
(1)
Inspectoperationof fuel cell baffles,checkvalves,and fuel tanks. (Refer to 28-10-00)
(2)
Inspect interior of nacelle and tip tankfor contamination, corrosion,andevidenceof leaks.
14. 2,800 Hours
(a)
LandingGear
Nose Left Right
(1)
Replacemaingearretractionarm,P/N42042-02.
(2)
Replacemaingearlinkbolts,P/N400209.
15. 3,000 Hours
(a)
Propellers
Left Right
(1)
Overhaulpropellersevery 3,000 hoursor five (5) years, whichevercomesfirst. Refer
to latest Hartzell Service Letter No. 61.
(b) Landing Gear
Nose Left Right
2. Replacepivotshaft, P/N 43286-02.
16. 3,000Hours or at escalated time between overhauls as authorized by Pratt & Whitney Aircraft Canada
(a)
Engines (PT6A-61)
Left Right
(1)
Overhaulengines.
(2)
Replacerubberenginemounts.
(3)
Overhaulor replacefuelcrossfeedand shutoff valves.
NOTE: Refer to the latest Pratt & Whitney Canada Service Bulletin 13303 for criterion for escalating time between overhaulson PT6A-61 engines.
17. 3,100Hours
(a)
LandingGear
Nose Left Right
(1)
Replacemaingearlinkassembly,P/N85165-2Rev. B.
18. 4,500 Hour
(a)
Cockpit Voice Recorder
(1)
Replacecockpitvoicerecorder (if installed).
(b)
Engines(PT6A)
Left Right
(1)
Overhaulor replace overspeed governors.
EFFECTIVITY:
040-999
Feb 1/98 5-50-00
PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. SpecialInspections(continued)
19. 7,500 Hour
(a)
Engines (PT6A)
Left Right
(1)
Replace engine mount bolts located at the firewall (Station 106.00).
20. Three (3) Years
(a) OxygenCylinderand Regulator
WARNING: DO NOT PERMIT OIL, GREASE OR OTHER PETROLEUM PRODUCTS TO COME IN CONTACT WITH ANY LINES OR FITTINGS USED IN OXYGENSYSTEM.
WARNING: BE SURE SKIN AND CLOTHING ARE FREE OF GREASE, OIL, GASOLINE OR OTHER PETROLEUM PRODUCTS BEFORE PERFORMINGANY WORKON THE OXYGENSYSTEM.
(1)
Oxygen cylinders (DOT 3HT -Steel, thin wall): Hydrostatic test to 5/3 their working pressure and retire from service at 24 years or 4,380 filling cycles (partial or full pressurization) after date of manufacture, whichever comes first. Oxygen cylinders (DOT E-8162 or E-8391 -composite): Hydrostatic test to 5/3 their working pressure and retire from service at 15 years.
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