Piper PA-34-200T Seneca II, Service Manual

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7-40a. FUNCTIONAL TEST OF LANDING GEAR RETRACTION SYSTEM.
(PIR-PPS60033, Rev. L.)
NOTE: During testing of Prestolite pump, keep hydraulic fluid level in reservoir at 1/2 inch below top
of filler hole.
NOTE: After filling Oildyne reservoir, tighten dipstick, then backoff 1 1/2 turns. This is essential to
allow the reservoir to be vented.
a. Jack airplane.
b. Apply 12-14 volt auxiliary power capable of supplying a minimum of 50 amperes.
c. Turn all switches off, place gear selector in the down position and place throttles in closed position.
Turn landing light switch from off to on position and cabin heat switch to fan position.
d. Push landing gear pump circuit breaker in.
e. Ensure that:
1. Three green safe lights are on.
2. Red gear unsafe light is off.
3. The gear warning horn does not sound.
4. Hydraulic pump does not operate.
5. Landing light is illuminated.
6. Heater fan is operating.
f. Place gear selector switch up.
g. Ensure that:
1. Three green safe lights are off.
2. Red gear unsafe light is on.
3. Gear warning horn sounds.
4. All gear retract fully and nose gear doors close.
5. Pump motor stops operating.
6. Landing light extinguished.
7. Heater fan turns off.
h. Move the left throttle to mid-travel position. Warning horn should continue to sound and red gear
unsafe light should remain on.
i. Close left throttle, then move right throttle mid-travel position. The warning horn should continue to
sound and the red unsafe light should remain on.
j. Move both throttles to mid-travel position. The warning horn should stop sounding and the red
unsafe light should go out.
k. Leave the gear up for five minutes.
1. Check that the pump motor does not operate at any time. (If pump motor operates during this
time, there is a leak in the up line or a component is malfunctioning.) See following step.
2. One momentary pump operation is allowable during this five minute period only if the gear
unsafe light is not lit and there is no repeated pump operation for a subsequent 15 minute
period.
1. Pull landing gear pump circuit breaker out.
PIPER SENECA II SERVICE MANUAL
01/01/09 VII - LANDING GEAR AND BRAKE SYSTEM
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