Piper Malibu PA-46-310P Pilot Operating Handbook page 91

PIPER AIRCRAFf CORPORATION
PA-46-310P, MALIBU
SECTION 3
EMERG PROCEDURES
(c) Ensure that the ALTR No. 1 switch is ON for single alternator
equipped aircraft or that the ALTR No. 2 switch is on for dual
alternator aircraft.
Turn
the battery switch OFF.
(1) If
the ammeter indication decreases, a battery fault is indicated.
· Turn the battery switch ON and continue to monitor the
ammeter. If the alternator output does not decrease within 5
minutes, tum the battery switch OFF, tum the ALTR No. 1
switch ON if equipped with dual alternators and land as soon as
practical. All electrical loads are being supplied by the
altemator(s).
NOTE
Due to higher voltage and radio frequency
noise, operation with the ALTR switch(es) ON
and the battery switch OFF should be made
only when required by an electrical failure.
(2) If the ammeter indication does not decrease when the battery
switch is turned OFF, an alternator fault is indicated. If the
aircraft is equipped with a single alternator, turn the ALTR
No. 1 switch OFF and the battery switch OFF and turn the
EMER BUS switch ON. Activation of the emergency bus
switch will allow the use of the minimum equipment necessary
to operate the aircraft and will provide maximum flight time
prior to battery depletion. Refer to the Electrical Schematics in
Section 7 for a list of equipment supplied by the emergency bus.
All electrical loads are being supplied by the battery. If the
aircraft is equipped with dual alternators, turn the battery
switch ON, the ALTR No. 2 switch OFF and the ALTR No. 1
switch ON. If the overload condition is not present, the fault is
in the No. 2 alternator. Continue the flight with the ALTR No.
2 switch OFF. If the overload condition persists, turn both
ALTR switches OFF and the battery switch OFF and turn
the EMER BUS switch ON. All electrical loads are being
supplied by the battery. Land as soon as possible.
NOTE
If the battery is depleted, the landing gear must
be lowered using the emergency extension
procedure. The gear position lights will be
inoperative and a flaps up landing will be
required.
ISSUED: JANUARY 11, 1984
REVISED: MARCH 19, 1999
REPORT:
VB-1200
3-23