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EngineMaintenanceManual
for cleaning instructions.)
Replacefuelcontrolunit.
Adjust linkage.
Replace fuel controlunit.
Check instrument system.
Replaceor recalibrateas
necessary.If torquemeter
system defect is established,
return power sectionto
overhaulfacilityforrepair.
Check adjustment.
Adjust.
Check all tubes for restrictions and connections for leakage.
Checkadjustmentsettings.
Replacefuelcontrolunit.
Cleanand check nozzles. (Referto Engine Maintenance Manual).
Replace propeller.
Returndisc to an overhaul facility. (Referto Engine MaintenanceManual.)

EFFECTIVITY:
040-999
71-00-00
AGE 3
71-00-00Jan10/90

PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

B. Fault Isolation (continued)
CHART 1
FAULT ISOLATION (ENGINE) (Sheet 3 of 3)

Fault
Low oil pressure.
High oil temperature.
Excessive oil consumptior
Engine drops below idle ( min. flow) in flight.
PAGE
Jan 10/90 71-00-00
Cause

Oil pressure indicating system defective.
Insufficient oil.
Excessivehot air leakage
through faulty heat shielding.

High oil temperatures. Insufficient oil supply.
Faulty instrumentation.
Cooling system defective.
Excessivehot air leakage through faulty heat shielding.
Leakageor restriction in pressure or scavenge oil tubes.
Oil level too high. Defective Labyrinth seals.
Defectiveoil to fuel heater (internalleakage.)
P-Y line leaking.
Leak or restriction in P-3 line.
Ice accumulation in P-3 line.
Remedy
CChecksystem and repair as necessary.
Fill oil tank as required.
RReplaceengine.
CCheckcoolingsystem.
Refilloil tank as required.
CCheck instrumentation, repair
or replace as required.
CChecksystem and clean cooler required.
Replaceengine.
Visually inspect all tubes and onnections.Repairas required.
correct oil level.
Maintain
CCheck inlet and exhaust areas for collections of oil. If evident, replace engine.
Pressurecheck heater. (Refer tto Engine Maintenance Manual.)
CCheckP-Y line connections for leakage.
CCheckP-3 line for restriction. Replaceif required.
CCheckwiring and connections f electrically heatedP-3 line. Repairor replace as required.
EFFECTIVITY: 040-999

PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL

AN7-27ABolt
AN960-716Washer(UnderHeadandNut)
AN960-716LWasher(UnderNut)

A

Torqueto 225 to 300 Engine
FireSeal

Inch-Pounds
VIEWA-A
STA STA
56.97 75.70
LEFTSIDEVIEW
Power Plant Installation Figure 401 (Sheet 1 of 2)
REARVIEW
Torqueto
170 -200
Inch-Pounds

STA STA
96.00 106.00

EFFECTIVITY:
040-999
PAGE
71-00-00
Apr15/91

PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

Torqueto
Engine
170 -200
Fireseal
Inch-pounds
-Engine
Mount
TOP VIEW

STA STA STA STA
106.00 96.00 75.70 56.97
STA  STA  STA  STA 
106.00  96.00  75.70  56.97 
RIGHTSIDEVIEW 
PowerPlant Installation 
Figure401 (Sheet 2 of 2) 

EFFECTIVITY: 040-999

Apr15/91 71-00-00
Apr 15/91 71-00-00
PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCEMANUAL

C.  Engine Removal (Figure 401)
The removal of either engine is basically the same except for routing of some wires, cables, and lines. Remove the engine as follows:
1.  
Placea tail stand under aircraft.

2.  
Turn OFF all cockpit switches and disconnect battery.

3.  
Move fuel shutoff valve to OFF position.

4.  
Removeengine cowling. (Refer to 71-10-00.)

5.  
Drainengine oil. (Refer to 12-10-00.)

6.  
Removepropeller. (Referto 61-10-00.)

NOTE: Identify disconnected items, mark all clamp locations to facilitate installation, and cap all lines and necessaryfixtures.

7.  
Disconnect all fluid hoses, bleed air lines, clamps, and electrical leads attached to engine and engine mount from firewall. (Cap all fluid lines.)

WARNING: USE CAUTION WHEN WORKING WITH FIRE EXTINGUISHERSYSTEM. ACCIDENTALDISCHARGECAN CAUSE BODILY INJURY.

8.  
Remove fire extinguisher system. (Refer to 26-20-00.)

NOTE: The oil cooler system remains attached to bulkhead along with portion of ice protection system.

9.  
Disconnect and cap oil cooler lines at engine.
　
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