夏延飞机维护手册 Cheyenne IIIA PA-42-720 AMM 2(111)

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(3.) Installation procedurefor baggage door tube and arm assemblies is as follows: (a.) Secure arm assemblies to clevis ends on tube assembly with pins, washers, and cotter pins. Ensure proper arm assembly is on each end of tube.
(b.) Place completetube and arm assembly onto rear of door, ensuring projection on handlealigns with tube assemblylink. Replacesix machine screws (three on each side) to hold arm assemblies to door.
(c.) With holes in both handle projectionandtube assembly link aligned, insert roll pin. (d.) Adjustmentmustbe made before replacing cover. Use six machine screwsto secure coveron door assembly.
(c) Forward Baggage Door Latch Adjustment
Adjustmentis done by removing cover and adjustment of two clevis fittings, located at ends of tube assembly. (1.) Remove cotterpin, washer, and pin from clevis and arm assemblies. Loosen locknuts
between clevis and tube. (2.) With handle in closed position,turnclevis in or out to get arms to extend out at a 90 degree angle to edge of door assembly. (3.) When adjustment is completed, tighten locknuts and reconnectclevis and arm assemblies withpins, washers, and cotter pins. Replace cover and secure with six machine screws.
EFFECTIVITY:
040-999

Jan10/9052-30-00

PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCE MANUAL

A. Service
1. NoseCone Removal (Figure401)
(a)
Gain access to locking handle through forward baggage compartment door.

(b)
Lift handle from keeper. Pull out on handle, and turn counterclockwise to unlock four locking

pins.

(c)
Swing nose cone forward and to the right of fuselage.

(d)
Disconnect any electronic cables going into nose cone.

(e)
Remove hinge pin.

NOTE: Support nose cone before removing hinge pin.
2. Nose Cone Installation (Figure 401)
(a)
Place nose cone in position with hinge halves aligned.

(b)
Insert hinge pin.

(c)
Connect any electronic cables previously disconnected.

(d)
Close nose cone. Secure in place by moving handle clockwise and returning handle to handle keeper.

Nose Cone Installation 
Figure 401 
EFFECTIVITY: 
040-999 
52-40-00  PAGE1Jan 10/90 

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

A. DoorWarning
1.
DoorAjar SwitchesDescription(Figure1)

Sevenswitchesarewired in parallelin the cabindoorchannel;threeon eachsideand oneon top. Theseswitchesareadjustedto senseinsertionof doorplungersintheir receptaclesin the locked position. If anyof the switchesareout of adjustmentand thecircuitiscompleted,the cabindoor ajar lightwill stayon. The lowerforwardswitchis atwo poleswitch. Thepurposeof these switchesisto provideindependentgroundto the warninglightassemblyif anyof the lockingpins do notengageproperly.

2.
DoorAjarSwitchesRemoval

(a)
Removeinteriortrim panelfromarounddoorframe.

(b)
Disconnectelectricalleadsfromswitch.

(c)
Loosenretainernut, unscrewswitchfromreceptacleandremoveswitch.

NOTE: Notepositionof eachwireto facilitatereinstallation.
Door  Frame  3. Receptacle 
4. Door Ajar 
Switch 
_ 
2. Locking 
2. LockingLug  4. Door-jar 

DoorAjar Switch 
Figure1 
EFFECTIVITY: 
040-999 
52-70-00
 PAGE1Jan 10/90 

PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

A. DoorWarning (continued)
3. DoorAjar SwitchesInstallation
(a)
Installnewswitchintolatchreceptaclelocatedbehinddoorframe.

(b)
Makesurelockingpin is properlyadjusted.

(c)
Withdoorclosedand locked,screwswitchintoreceptacleuntilswitchactuates(OFFposition).

NOTE: An ohmmeteror continuitytestercan beusedto indicateswitch actuation.
(d)
Secureswitchin this positionwith retainernut.

(e)
Connectwiresto their properplaceon switch.

(f)
Lock andunlockdoor severaltimesto assureproperadjustment.

(g)
Installinteriortrim panelarounddoorframe.

4. DoorAjar SwitchesAdjustment
Sincesevenswitchesarewiredin parallel,eachone mustbecheckedand adjustedseparately. Thisis doneby jumpingwiresat switchesnotbeingadjusted.
(a)
Beforeadjustingswitches,ensurealllockingpinsare adjusted.

(b)
Removeinteriortrim panelfrom arounddoorframe.

(c)
Withdoorclosedand locked,screwswitchintoreceptacleuntilswitchactuates.

NOTE: An ohmmeterorcontinuitytestercanbeusedto indicateswitch actuation.

(d)
Whenadjustmentis satisfactory,tightenretainernuton switch. Ifseveralswitchesarebeing adjusted,followsameproceduresfor eachswitch.
　
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