Electrical Failures (Generator); Excessive Discharge; Battery Overcharge - Piper PA-24-250 COMANCHE Pilot Operating Handbook

Aircrart Public31ions
Pipcr Comanchc 250 (Early Model)
Section -
3
Ernergcncy
Procedures
ELECTRICAL FAILURES
(For an Aircraft Equipped With a Generator)
1.)
Excessive Discharge:
**
NOTE
**
The generator produces no charging output when the engine is operated below approximately
1200 rpm. An excessive rate of discharge at normal operating rpm indicates a defective
generator or voltage regulator.
Ammeter ...........................
. .
.............................................. Indicates Battery Discharge
....................... ............................
Generator Circuit Breaker
. .
Check and Reset as Required
**
NOTE
**
Before attempting to reset any circuit breaker, allow for a two to five minute cooling off
period, and reset only once.
If circuit breaker is reset (closed):
. .
Electrical Load ................................................................................ Reduce to a Wmmum
If generator output cannot be maintained with electrical load reduced to a minimum: Manually
pull the generator circuit breaker, maintain minimum electrical load, and land as soon as
practical.
**
NOTE
**
The battery is the only remaining source of power.
If the battery is depleted: Land without flaps. (VMP
=
95 mph or
83
kt) Initiate Manual
Gear Extension procedure @Part
3.
(Page
3-8)
2.) Battery Overcharge:
**
NOTE
**
A high rate of charge is normal for the first few minutes of flight. An excessive rate of charge
after several minutes at normal operating rpm indicates a defective battery or voltage regulator.
Ammeter ..................................................................................
Indicates Excessive Charge
.
.
Generator C ~ r c u ~ t Breaker .....................................
...
........................................................ Pull
Electrical Load ........................
. .
.................................................... Reduce to a Minimum
Anticipate complete electrical failure. Land as soon as practical.
**
NOTE
**
The battery (whlch may be defective) is the only remaining source of power
If the battery is depleted Land without flaps (VMP
=
95 mph or 83
kt) Initiate Manual
i
Gear Extension procedure @ P a r t
3 (Page 3-8)
Copyright:
1993
Page 3-4