10.
Disconnectand remove rear top left and top right fire seals from engine.
11.
Disconnectall drain lines attached to engine and fuel lines attached to scavenge pump.
CAUTION: DO NOT BEND POWERCONTROL CABLE IN DIRECTION OFFERINGGREATEST RESISTANCE,WHICH WILL DAMAGE CABLE.
12.
Disconnect power control cable from fuel control unit actuating lever and remove cable from
support bracket. Disconnect and remove support bracket.
13.
Disconnect starting control cable from start control lever arm. Remove cable clamp from cable support bracket. Disconnect and remove support bracket.
14.
Disconnectpropeller control cable from propeller control rod. Remove cable clamps and draw cable aft to firewall.
15.
Attach lifting sling to engine suspension points. Using a one-half ton hoist, support engine to disconnectengine and mount from firewall.
16.
Swing engine and mount free from firewall. Ensure not attachments remain to obstruct its removal.
17.
Move engine away from aircraft and place on suitable stand.
18.
Removeaccessories and equipment to be installed on new engine. Tag or identify all items to facilitateinstallation.
NOTE: If engine removed is expected to be inactive for a period of time. Refer to the Pratt and Whitney Engine Maintenance Manual, P/N 3034342, for the necessary preservation schedule.
EFFECTIVITY:
040-999 Page
71-00-00 Jan 10/90
Jan 10/90
PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
D. EngineInstallation
Theinstallationof eitherengineis basicallythe sameexceptfor hookupand routingof somewiresand
lines.Beforeinstallingengine,ensureall engineaccessoriesareproperlyinstalled,torqued,and
safetied.
1.
With enginesuspendedfrom a one-halfton hoist,carefullyswingengineassemblyin place. Do notdamageanyenginecomponents,plumbing,or wiring.
NOTE: Apply anti-seizecompoundto allmaletubingthreads. Be certaincompounddoesnot enter system. Priorto installingcompressorbleedair linefittingto engine,makesure correct lengthbolts areused. Coatboltthreadssecuringfittingto compressorcasewith Fel-ProC5-aHi-Temperaturethreadcompound. Torquebolts65-85inch-pounds,and safetywith MS20995-C41safetywire.
2.
Installenginemountand torquemountingboltsto specificationsshownin Figure401.
NOTE: Bolttorquemustbe obtainedusingathreadlubricant,engineoil, or equivalent. Further runbolt downto nearcontactwiththe washersurfaceandcheck"frictiondragtorque" requiredto turn bolt. Addthe frictiondragtorqueto desiredtorque.
3.
Routeand reconnectall previouslydisconnectedfluid hoses,lines,andelectricalleadsfrom firewallto properconnectionson engine. Securewith appropriateclamps. Referto latestrevision of PiperServiceLetter727for informationon firewallinspection.
4.
Routepropellercontrolcablethroughbracket,clampassembly,and reconnectto propellercontrol rod.
5.
Connectstart controlcableto startcontrolleverarm. Attachcableclampto cablesupportbracket.
6.
Connectpowercontrolcableto fuel controlunitpowerlever.
7.
Installpropeller. (Referto 61-10-00.)
8.
Adjustengineand propellercontrols. (Referto 76-10-00.)
WARNING: USE EXTREMECAUTIONWHENWORKINGWITHFIREEXTINGUISHERAS ACCIDENTALDISCHARGECANCAUSEBODILYINJURY.
9.
Installfire extinguishersystem. (Referto 26-20-00.)
10.
Refilloil tank with specifiedtypeand amountof oil. (Referto 12-10-00.)
11.
Connectbattery.
12.
Performpost installationprocedures.
13.
Checkfor fueland oil leaksandsecurityof enginecomponents.
E. EngineBuildup
WARNING: REFERTO THE PRATTANDWHITNEYENGINEMAINTENANCEMANUAL,P/N 3034342,BEFOREATTEMPTINGTO REMOVEA NEWENGINEFROMSHIPPING CONTAINER.
NOTE: Replacementenginesmustbe purchasedthroughthe PiperServiceDepartmentto be compatiblewith Piperinstallation.
Enginebuildupconsistsof transferringnecessaryaccessoriesand equipmentfromengineremovedfor overhaulto a newengine. Replacesafetywire,lockwashers,gaskets,andrubberhosesto complete engineassemblyfor installationin aircraft.
EFFECTIVITY:
040-999 Apr
Apr15/91
71-00-0071-00-00
PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. Cowling
1. Removalof Cowling (Figure401)
Same procedure is used for removing left side and right side cowlings:
(a)
Removelouversat the exhaust.
(b)
Disconnectcompressor bleed-air louversfrom upper cowling.
(c)
Removescrewsfastening both generator cooling inlet scoop and outlet duct to upper cowling.
(d)
Remove upper cowling.
(e)
To remove lower cowling, remove ice protection system assembly access cover. Disconnect rodfrom ice deflector door. Disconnectwire leads from limit switches and deicer boot.
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