Mooney M20V - Page 301

MOONEY INTERNATIONAL CORPORATION
M20V SERVICE AND MAINTENANCE MANUAL
Date
MAR 2017
Rev Date
Page
20
32-31-00 - TROUBLESHOOTING – LANDING GEAR SYSTEM
TROUBLE PROBABLE CAUSE REMEDY
Incomplete Retraction. Gear re-
tracts to an intermediate position
and stops short.
Bind in gear retraction system be-
cause gear is out of rig.
Refer to landing gear rigging pro-
cedure. Examine all movable parts
for proper lubrication and freedom
from binding. Check for actuator
worm gear binding and lubricate
as needed.
Malfunction in gear electrical circuit,
inoperative actuating motor
Any malfunction can cause the
landing gear circuit breaker to trip:
therefore check electric circuit for
loose connection, broken wires or
defective relay switches.
Weak battery. Recharge battery.
Oversized/Stretched tire will not go
into wheel well properly.
Replace tire with smaller diameter
tire.
Gear will not retract at 61 to 70 KIAS.
Insufficient airspeed. Check Pitot tube and line for ob-
structions.
Pressure switch inoperative. Examine pressure switch for prop-
er adjustment and operation.
Does gear retract using override? Check system operation.
Circuit breaker tripped. Reset circuit breaker.
Actuator ball nut binding on me-
chanical DOWN STOPS.
Gear may have been extended
manually & ball nut is jammed tight
against STOPS on motor; use
wrench on ball nut flat to move
from STOPS.
Gear will not retract and gear ac-
tuator C/B trips.
Manual engage handle in engaged
position.
Disengage manual system.
Aircraft does not track or steer
properly during taxi operations.
Nose wheel location improper. See Section 32- 50- 02.
Gear will extend; green indicator-
light will not illuminate.
Down- limit switch malfunction. Check circuit and/or down- limit
switch.
Actuating motor extends gear to
an intermediate position.
Same causes as listed with “In-
complete Retraction”.
Same remedies as listed with “In-
complete Retraction” above.
Gear will extend manually, but
GREEN indicator light will not illu-
minate.
Gear switch is not in DOWN
position.
PlacegearswitchinDOWNposi-
tion.
Lamp burned out in GREEN indi-
cator light.
Replace burned out lamp.
Manual system will not lower gear.
Actuator internal clutch spring bro-
ken.
Replace spring.
Manual engage arm improperly
rigged.
Rig manual engage arm.
Sheared female spline in drive
connector.
Replace drive connector if female
spline is stripped.
Drive connector is out of rig. Adjust control cable tension of
drive connector.
Landing Gear Actuator will not re-
tract nor extend gear.
Any of the above or brushes in
motor are worn beyond limits.
Applicable remedy listed above or
replace motor or brushes.
32-31-00