Piper Navajo PA-31 Service Manual page 270

PIPER NAVAJO SERVICE MANUAL
TABLE V-II. TROUBLESHOOTING CHART (CONTROL SURFACES) (cont.)
Trouble
Cause
I
Remedy
ELEVATOR TRIM CONTROL SYSTEM (cont.)
Trim tab fails to
reach full travel.
System incorrectly
rig-
ged.
Check and/or adjust
rigging per Paragraph
5-27.
Either or both trim
drums incorrectly
wrapped.
Check and/or adjust
rigging per Paragraph
5-20.
Trim indicator fails
to indicate correct
trim position.
Trim indicator fails
to indicate any move-
ment.
Trim sender unit not
adjusted properly.
Low voltage in system.
Circuit breaker open.
Master switch not on.
Adjust in accordance
with Paragraph 5-36.
Check power supply.
Reset circuit breaker
Turn on master switch.
Trim indicator
defec-
tive.
Trim indicator ground
open.
Trim sender unit de'
fective.
Defective wiring in sys-
tem.
Replace indicator unit.
Check ground wire.
Replace sender unit.
Check wiring.
Trim indicator
pointer
moves to extreme
nose down position.
Trim sender unit ground
open.
Check sender unit
ground.
Reissued: 10/12/79
SURFACE CONTROLS
1L6