(2)
Regulators on oxygen cylinders (DOT 3HT -Steel, thin wall) and on oxygen cylinders (DOT E-8162 or E-8391 -composite): Perform a functional check, and overhaul every 6 years.
21. Five(5) Years
(a)
Engine Fire Extinguisher Bottle
Left Right
(1)
Hydrostatictest.
(2)
Replacesquib.
(b)
Oxygen Cylinder and Regulator WARNING: DO NOT PERMIT OIL,GREASEOR OTHERPETROLEUMPRODUCTSTO COME IN CONTACT WITH ANY LINES OR FITTINGS USED IN OXYGEN SYSTEM. WARNING: BE SURE SKINANDCLOTHINGARE FREE OF GREASE,OIL,GASOLINE
OR OTHER PETROLEUM PRODUCTS BEFORE PERFORMING ANY WORK ON THE OXYGEN SYSTEM.
(1)
Oxygen cylinders (DOT 3AA -Steel): Hydrostatic test to 5/3 their working pressure.
(2)
Regulators on oxygen cylinders (DOT 3AA -Steel): Overhaul.
(c)
LandingGearEmergency Extension Nitrogen Bottle
Nose Left Right
(1)
Replace squib.
22. Seven(7) Years
(a)
Replace flexible pneumaticlines in wings and fuselage.
(b)
Flexible bleed air lines (high temp) to be replaced at 1500 hours or 7 years, whichever occursfirst (at pneumaticpressureregulatorandat pneumatic boot deice injectors).
23. Eight (8) Years
(a)
Engines (PT6A)
Left Right
(1)
Replaceall flexible fuel, oil, pneumatic, and hydraulic hoses, forward of the firewall.
EFFECTIVITY: 040-999
5-50-00 Feb 1/98
PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. SpecialInspections (continued)
24. Ten (10) Years
(1) Pressurizeall fluid hosesto systempressuresandvisuallycheckfor leaksora notable amountof stiffness. If found free of leaks, returnto servicefor an additional 5 years
andpressurecheckperabove. Recheckevery5 years afterinitialten year inspection. Replacehosesasnecessary.
NOTE: The hoses areto be checked in the aircraft withoutdisturbingthe hoses.
25. Twelve(12) Years
(a)
Fire Extinguisher(PortableUnit)
(1)
HydrostaticTest
B.
Specialor UnusualConditionInspection
1. General Thissectioncontainsinspectionsrequiredin additionto the normalevent schedule; whenthe
aircraftis operated continuouslyin adverse environmentalconditionsor subjected to unusual incidents.
Thespecialinspectionsrequiredunderadverseenvironmentaloperatingconditionsshouldbe repeatedin accordancewith thetimeintervalsspecified.
The unusualincidentinspectionis normallyaccomplishedon a one time basisassociatedwith eachcondition.
Itemsindicatedin this procedureare guidelines basedon past operatingexperience.Each operatorshouldreviewhis own operating conditionsand reactaccordinglyto keephis aircraft airworthy.
NOTE: A log bookentry shouldbe made uponcompletionof these inspections.
2. Operationin High Dust or IndustrialPollution
Item Inspection InspectionInterval
P3 Air filter Remove,inspectandclean. 100 Hours
Replaceas required.
Air IntakeScreens Cleanandinspectfor damage. 100 Hours
EngineOil Filter Cleanand inspect condition. 100 Hours
EngineOil Drainand replace. 200 Hours
Compressor Inspectandcomplete performance Weeklyor more
recoverywash. often as required.
Propellers. Referto latest HartzellServiceLetter. 1,500Hours
Three (3) years.
Cowling. Snug fit of firesealsand ice doors. 100 hours.
Water Separator Coalescer Remove,inspectand wash. 100 Hours or
as required.
Cabin Environmental and Inspectand replace if necessary. 100 Hours.
Instrument Air Filters.
EFFECTIVITY:
040-999
Feb1/98 5-50-00
PIPERAIRCRAFT PA-42-720(AdvancedTrainer) MAINTENANCEMANUAL
B. Specialor Unusual ConditionInspection(continued) 2. Operationin High Dustor IndustrialPollution(continued)
Item Inspection InspectionInterval
CAUTION:CHECKTHATLINESAREDISCONNECTEDFROMSYSTEM.
Pitot/Staticsystem
LandingGear Up and DownLockAssemblies.
LandingGearActuators andOleos.
LandingGearwheel Bearings.
Windows.
Checkforobstruction.Reverse flowto lines.
Clean,inspectand lubricate(Referto l2-10-00)
Inspectandclean.
Clean,inspectand repack.
Inspectfor cracks, erosion,visibility
andcleanliness.
3. Operationin HighSaltor HumidityEnvironment
Item Fuselage,Empennage
and Wings.
LandingGear.
Engines.
Instrumentsand Wiring.
Interior.
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