Piper Navajo PA-31 Service Manual page 276

PIPER NAVAJO SERVICE MANUAL
TABLE V-II. TROUBLESHOOTING CHART (CONTROL SURFACES) (cont.)
Trouble
Cause
Remedy
I
FLAP CONTROL (PIPER) SYSTEM
Flaps fail to extend
or retract.
Flap so-
lenoid does not ac-
tuate.
(Solenoid circuit)
(cont.)
Flaps fail to retract
completely.
Flaps do not extend
completely.
Flaps not synchronized
or fail to fit evenly
when retracted.
Flaps have erratic
operation
during
extension
and retrac-
tion.
Revised: 1/29/82
Ground open from flap
solenoid.
Defective circuit wiring.
Up limit switch incor-
rectly adjusted.
Down limit switch in-
correctly adjusted.
Incorrect
adjustment of
the transmission
tube.
Binding between flexible
shaft and motor.
Binding between track
and rollers.
Slipping or stripped
transmission.
Loose electrical con-
nection.
Check ground connec-
tion.
Isolate cause and re-
pair.
Adjust flap in accor-
dance with Paragraph
5-66.
Adjust in accordance
with Paragraph 5-66.
Rig in accordance
with
Paragraph 5-66.
Isolate cause and lu-
bricate
cable if re-
quired.
Refer to Rigging and
Adjustment, Paragraph
5-43.
Replace transmission.
Check and repair elec-
trical connections.
SURFACE CONTROLS
1L12