Piper SEMINOLE PA-44-180, Руководство по обслуживанию

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POSITION AND WARNING.
LANDING GEAR LIMIT SWITCHES.
— Note —
All adjustments of the limit switches should be made with the airplane on jacks. Do
not bend actuator springs mounted on the limit switches.
ADJUSTMENT OF MAIN GEAR UP LIMIT SWITCH.
A gear up limit switch is located in each wheel well above the gear door hinge. There is no adjustment of
these switches other than check that the gear, when retracting, will actuate the switch within .88 of an inch of full
up. Switch operation turns the red gear unsafe light out.
ADJUSTMENT OF MAIN GEAR DOWN LIMIT SWITCH.
A gear down limit switch is mounted on a bracket which is attached to the lower drag link of each main gear.
The switch should be adjusted to allow it to actuate thus turning on the green indicator light within the cockpit
when the downlock hook has entered the locked position and is within .025 to .035 of an inch of contacting the
downlock pin. (Refer to Figure 32-23.) Adjustment of the switch may be as follows:
1. Ascertain that the main gear downlock is properly adjusted.
2. Raise the airplane on jacks. (Refer to Chapter 7.)
3. Ascertain that the landing gear is down and pressure is relieved from the hydraulic system. To relieve
pressure, hold down the emergency extender lever.
4. Raise the downlock hook assembly and place a .030 of an inch feeler gauge between the horizontal surface
of the hook that is next to the switch (the surface that contacts the downlock pin) and the rounded surface of
the pin. Lower the hook and allow it to rest on the feeler gauge.
5. Loosen the attaching screws of the switch and, while pushing up on the center of the link assembly, rotate
the switch toward the hook until it is heard to actuate. Retighten the attaching screws of the switch.
6. Manually move the hook assembly up from the pin until the hook nearly disengages from the pin. Then,
with pressure against the bottom of the link assembly, move back to ascertain that the switch actuates within
.025 to .035 of an inch of full lock.
7. Retract and extend the gear by turning the master switch on and moving the gear selector handle to the up
position. As the gear begins to retract the green light below the selector should go out and the red gear
unsafe light at the top of the instrument panel should come on.
ADJUSTMENT OF NOSE GEAR Up AND DOWN LIMIT SWITCHES.
The nose gear up and down limit switches are located on the right nose cone spar assembly and are mounted
either side of fuselage station 24.00.
1. To facilitate adjustment of the switches, disconnect the gear doors.
2. With the aircraft placed on jacks (refer to Chapter 7), turn the master switch on. Move the gear selector
switch to the gear up position to raise the landing gear. Turn the master switch off.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
3 2 - 6 1 - 0 3
Page 32-54
Revised: May 15, 1989
2H22
PIPER AIRCRAFT