57-00-00 PAGE 1
Jan 10/90
PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. Removalof Wing (Figure401)
CAUTION: TO PREVENTDAMAGEOR CONTAMINATIONOF FUEL,HYDRAULIC,AND MISCELLANEOUSLINES, PLACEPROTECTIVECOVERSOVERLINE FITTINGS ANDENDS.
1.
Closefuel shutoffvalveand crossfeedvalve. Drainfuelfromwing.
2.
Removeengine. (Refer71-00-00.)
3.
Removefairingandaccesspanelfromaroundleadingedgeof wing.
4.
Removescrewsattachingfairingto wingand fuselage;removefairing.
5.
Drillout rivetssecuringdraganglebetweenwing andfuselageontop sideof wing.
6.
Removeaccessplatesfromfairinglocatedbetweenundersideof wingbuttrib andfuselage.
NOTE: Tosimplifyreinstallationof controlcablesandfuelor hydrauliclines,markcableand line endsbeforeremoving. Attacha lineto cables,whereapplicable,beforepullingthem throughfuselageor wing.
7.
Removecableguardpins atwing stations147.50,30.00,and 0.50,andfairleadsat wingstations
121.50and58.50.
8.
Disconnectaileroncontrolcableandbalancecableat aileronbellcrank. Drawcablesoutthrough wing andtapeto sideof fuselage.
NOTE: Steps9 through12applyto the rightwing only. Steps13through24applyto bothwings.
9.
Blockailerontrim cableat sideof fuselageandwithinwingto preventtrimdrumfromunwrapping. Disconnecttrim cableturnbucklesatwing station90.00. Drawcablesinboardthroughwing.
10.
Removecableguardat butt endof wing. Tapecablesto fuselage.
11.
Disconnecthydrauliclinesat fuselagestation 140.00.
12.
Disconnectbleedair line.
13.
Disconnectmotordriveflex shaftfrom inboardflapactuatorand at motorin fuselage. Withdraw shaftfromwing.
14.
Disconnectfuel lineroutedthroughmainspar. Disconnecthydraulicandfuellines at exposed fittingsandcontrolcablesfromfuel valves.
15.
Disconnectengineinstrument,vacuum,fuel,and hydrauliclines. Removesupportblocksand clamps.
16.
Disconnectelectricalwire connectors.
17.
Drawenginecontrolcablesbackthroughfirewallenginenacelleandwing.
18.
Arrangesuitablefuselagecradleandsupportsfor bothwings.
19.
Removeattachmentboltandboltassemblyattachingwing sparto centerbeam.
20.
Removescrewsandnutssecuringsheetmetalsparweb fastenersat centerbeam.
21.
Removeboltattachingfront sparandfuselagefitting.
22.
Removeboltassemblyattachingrearspar andfuselagefitting.
23.
Drillout forwardfillet attachingbulkheadsfromwing buttrib.
24.
Pullwingdirectlyandslowlyawayfromfuselage,allowinglines,cables,etc,to follow.
EFFECTIVITY:
04-999
57-10-00 PAGE
57-10-00Jan
10/90
PIPER AIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCEMANUAL
B. Installationof Wing (Figure 401)
1.
Positionfuselagesolidlyon a support cradle.
2.
Positionwing with spar end a few inches from side of fuselage and set on trestles. Turn out three adjustingscrewsthat draw bottom fairing againstwing butt.
3.
Preparevarious lines, control cables, pressurization ducts, etc for insertion into wing or fuselage after wing is slid into place.
4.
Slidewing to center beam. (It may be necessary to insert a metal strip between fillet fairing and wingbutt to funnel the wing, between upperand lower fairings.)
5.
Install bolt attaching rearspar and fuselage fittings.
6.
Installboltattachingfront spar and fuselagefitting.
7.
Install upper and lower wing attachment bolts and nuts. Measurerunningtorque of nut with nut almost completely threaded,but before nut bottoms on part. After measuring running torque, tighten nut until it bottoms anda torque rise of 20 inch-pounds aboverunning torque is detected.
8.
Positionlowerwing attach bolt retainer and secure withbolt. (Figure 401)
9.
Positionforward upper wing attachmentboltretainer and secureto wing skin. Repeat procedure for aft upper wing attachmentboltretainer.
10.Torque forward spar bolt to 270-300 inch-poundsand rear spar bolt 480-600 inch-pounds.
11.Reinstallscrewsand locknuts in center beam web.
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