EFFECTIVITY:
040-999 PAGE
32-60-00 Jan10/90
PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. Position and Warning(continued)
2. FaultIsolation-Position and Warning(continued)
CHART 1
FAULTISOLATION(POSITIONAND WARNING)(Sheet2 of 2)
Fault Cause Remedy
Flashingredindicator lightor warninghorn Powerleverswitchesare faulty. Replaceswitches.
soundingwhenpower
fromone or both engines is above 150 foot-pounds Powerleverswitchout of adjustment. Adjustthrottleswitches.
of torque.
Red indicator light stays on with gear up and locked. Doorscouldbe open. Adjustdoors. (referto 32-10-00 and 32-20-00)
Switchdefective. Replacedefectiveswitch.
Flashingred lightand warninghornfail to Powerlever switches out of adjustment. Adjust throttle switches.
operatewhenpower
from both engines is reducedbelow150 Powerleverswitchesare defective. Replace switch.
foot poundsof torque.
Hornor light defective. Replacedefectivepart.
Defectivewiring. Checkwiring.
EFFECTIVITY:
PAGE2 040-999
Jan 10/90 32-60-00
PIPERAIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCEMANUAL
A. Positionand Warning (continued)
3. Adjustment of Main Gear Up Light Switch
(a)
Check that the main landing gear up lock is properly adjusted.
(b)
Retract gear fully and ensure the up lock roller is engaged and resting on the up lock hook. (No pressure on hydraulic system.)
(c)
Adjust gear up lock switch toward the link until it actuates. The red indicator light in the cockpit must go out.
NOTE: Opposite main gear switch and nose gear switch must be actuated to extinguish the red light.
(d) Extend and retract gear to ensure proper adjustment.
4. Adjustment of Main Gear Down Light Switch (refer to 32-60-00 Figure 501)
(a)
Ensure that the main landing gear down lock is properly adjusted.
(b)
With gear down and locked, the green indicator light in the cockpit must come on when the down lock hook is lowered within 0.030 to 0.069 inch of bottoming in the hook slot of the lower side brace link. Use the following check and adjustment procedure:
(1.) By hand, raise the down lock hook until the down lock switch actuates (click). (2.) With the hook raised, place a 0.070 inch wire feeler gauge between the hook and bottom surface of the slot in the side brace link (refer to 32-60-00 Figure 501). (3.) Lower the hook, allowing it to rest on the feeler gauge. (The end of the gauge must be even with the lockpin.) The switch must not actuate (click). (4.) Raise the hook again. Allow the switch to actuate and place a 0.030 gauge in the side brace link slot. (5.) Lower the hook. The switch must actuate, allowing the green indicator light in the cockpit to illuminate. (6.) When lowering the hook, if the switch actuates too soon adjust the switch toward the hook. If it actuates too late, adjust the switch away from the hook.
EFFECTIVITY:
040-999
32-60-00 Jan
Jan 109010/90
PIPERAIRCRAFT
PA-42-72C(AdvancedTrainer)
MAINTENANCEMANUAL
A. Positionand Warning(continued)
MainGear DownLimit Switch Figure 501
5. Adjustmentof Nose Gear UpLightSwitch
(a)
Checkthat the nose landinggear up lockis properlyadjusted.
(b)
Retractgearfully and ensure the up lock roller is engaged and restingagainstthe up lock hook. (Nopressureon hydraulicsystem.)
(c)
Adjustgearup lock switchtowardthe hook untilit actuates. Thered indicator lightin cockpit mustgo out.
NOTE: Maingear up switches mustbe actuatedto extinguishthe red light.
(d)
Extendand retractgearto ensure properadjustment.
6. Adjustmentof NoseGearDownLightSwitch
(a)
Be sure the gear is properlyadjustedfor down lock position.
(b)
Withthe geardown and locked,adjustgeardownswitch toward link until it actuates. The green indicatorin the cockpitmustcomeon.
(c)
Checkswitchoperationby partiallyretractingandextendingthe gear several times.
EFFECTIVITY:
040-999 PAGEJan10/90032-60-00
PIPERAIRCRAFT
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