TABLE XI-VI. TROUBLESHOOTING CHART (ELECTRICAL SYSTEM) (cont.)
Trouble
Cause
Remedy
ALTERNATOR (cont)
Output indicated on
Faulty voltage regulator.
Start engine, turn on load (ref.
ammeter does not meet
alternator test procedure), set throttle
minimum values specified
at 2300 RPM.Check voltage at bus bar
in alternator system
test procedure.
High resistance connec-
Check visually for loose binding posts
tions in field or output
at the various junction points in
circuit.
system, alternator battery post, lugs on
ammeter, connections at voltage
regulator, circuit breaker, etc, Examine
crimped terminal ends for signs of
deterioration at crimp or strands of
broken wire at crimp.Tighten any loose
binding posts or replace badwire
terminals.
Open rectifier.
If any of the six rectifiers pressed into
the rear bell housing of the alternator
open up internally it will result in a
definite limitation on the current that
can be drawn from the alternator. After
having checked the previous causes of
low output it can be assumed that a
faulty rectifier exists and replacement
of the rectifier is recommended.
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
ELECTRICAL SYSTEM
2E7
