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PA-46-350P, MALIBU
3.27 ELECTRICAL FAILURES (3.3m) (Continued)
DUAL ALTERNATOR FAILURE (Zero amps both ammeters or
ALTERNATOR #1 and #2 INOP light illuminated - annunciator panel)
Anytime total tie bus voltage is below 25 Vdc,
the LOW BUS VOLTAGE annunciator will
illuminate.
In the event that both alternators indicate failure simultaneously, reduce
electrical load to minimum required for safe flight by turning OFF switches
and pulling circuit breakers for all nonessential electrical equipment.
Maintain only that equipment required to provide heading, attitude, and
altitude information, plus one navigation radio and one communications radio
for emergency use only.
Attempt to reestablish alternator power on each alternator individually by
first turning OFF both alternators for at least one second, resetting any
tripped alternator (ALTR) control circuit breakers, and then turning each
alternator ON, one at a time.
If only one alternator can be restored, reinstate electrical load as desired
to a maximum of 75 amps. Land as soon as practical for proper repairs.
If neither alternator can be restored to operation, continue flight with
reduced electrical load on battery power only.
LOW BUS VOLTAGE annunciator will be
illuminated.
Land as soon as safely practical, as battery power duration is dependent
upon the condition of the battery at time of failure.
If battery is depleted, the landing gear must be
lowered using the emergency extension
procedure. The gear position lights will be
inoperative. the flaps will also be inoperative and
a flaps up landing will be required.
ISSUED: FEBRUARY 23, 1999
EMERG PROCEDURES
NOTE
NOTE
NOTE
SECTION 3
REPORT: VB-1710
3-31
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