Inspection
Removefloorpanelsand exterior accessplates;inspectfor corrosion.
Inspectfor corrosionandlubrication; switchesand wiring for condition.
Performdesalinizationandwash. (Refer to latest Pratt & WhitneyFieldNoteNo. 956).
Inspectfor proper seal of cases and corrosion.
Inspectupholstery,seatbelts,seatsand rugsfor corrosionand integrity.
100 Hours or as required. 100 Hours. 100 Hours. 100 Hours. Daily.
nspectlonInterval
200 Hours.
200 Hours.
DDaily or as required.
100Hours.
100 Hours.
EFFECTIVITY: 040-999
5-50-00 PAGE7
5-50-00 Jan10/90
PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
B. Special or Unusual Condition Ir Inspection (continued)
3. Soft or Unusual Terrain
Item Inspection
Landing Gear. Inspect for cracks, attachment,
damage, cleanliness and lubrication.
Wheels. Inspectfor cracks, damage, chipped
rims;bearingsfor damage, corrosion
and lubrication.
Tires. Inspect for cuts, wear, inflation and
deterioration.
Wheel Wells. Inspect for foreign material, damage
and corrosion.
Brakes. Inspect for damage, foreign material,
cracks and overheating.
Flaps, Lower Fuselage Inspect for damage, cracks and
and Wing. corrosion.
TipTanks. Inspect for proper attachment.
4. Operation in Extreme Cold
Item Inspection
Hydraulic, Pneumatic Check all fittings and attachments for and Environmental. security and leaks.
5. LightningStrike
Item Inspection
Propellers. Refer to latest Hartzell Service Letter..
Engine Oil filter. Inspect for contamination.
Electrical and Avionics Inspect and check for high voltage Systems. damageand operation.
InspectionInterval
100Hours.
100Hours.
Daily.
100 Hours.
Daily.
100 Hours.
100Hours.
InspectionInterval
First100 Hour, then as required.
InspectionInterval
Overhaulprior to
return to service.
Refer to P & W
PT6A-61Engine
MaintenanceManual.
Replace and overhaul
eachoccurrence.
EFFECTIVITY:
040-999
Jan 10/905-50-00
PIPER AIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCE MANUAL
B. Specialor UnusualConditionInspection(continued)
5. LightningStrike(continued)
Item Inspection InspectionInterval
All exteriorsurfacesand Inspectforburns,evidenceof arcing Replaceor repair
bearings. anddamageon surfacesandbearings. affectedareaseach occurrence.
StaticWicks. Replace. Replaceeachoccurrence.
6. EngineOverspeed,OvertorqueorSuddenStopage
Item Inspection InspectionInterval
Engine. SeeP&WPT6A-61 Immediately MaintenanceManual,Chapter72, followingincident. Table603.
Propeller. Propelleroverspeedof morethan 10%. Removeand Referto latestHartzellServiceLetter. overhaulbefore returnto service.
EngineMountand Inspectfordistortionand Replaceor repair Attachments. damage. as required.
EngineOil Filter. Inspectforcontamination. Referto Pratt& WhitneyPT6A-61 MaintenanceManual.
7. BatteryOvertemperature
Item Inspection InspectionInterval
Battery. Deepcyclebattery. Batteryovertemperature warningor indication.
Electrical. Inspectwiringandchargingcircuit Batteryovertemperature fordamage.Checkforproper warningorindication. opensandshorts.
Checkcrossfeeddiodefor opensandshorts.
EFFECTIVITY: 040-999
5-50-00
Nov
1/90
PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
B. Specialor Unusual ConditionInspection(continued)
8. SevereTurbulence,Hardor Overweight Landing
Item Inspection InspectionInterval
CAUTION: MINOR SUPERFICIAL DAMAGEMAY INDICATEA MORE SEVERECONDITION SOMEWHEREELSEIN THE STRUCTURE.
(a)
Placeaircraft in a normallevel attitude.
(b)
Makea preliminary inspectionof checkingalignmentandout-of-track condition of nacelles, engines,wings,tail, tip tanks, landinggearand doors.
(c)
FollowPiper and Pratt & Whitney MaintenanceManual procedures. If there are any questions regardingrepairsor procedures, contactthe Piper Aircraft CorporationService Department.
(d)
Inspectthe following itemsclosely to determine the extent of damage:
LandingGear Struts. Cracks,signsof overstress Hard or overweight
deformation,looseor damaged landing.
trunnionmounts.Axlesfor cracks,
bendingor flat spots. Damagedoleos
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