SECTION 9
SUPPLEMENT 23 PA-28-181, ARCHER III
REPORT: VB-1611 ISSUED: JULY 12, 1995
9-168, 16 of 36 REVISED: FEBRUARY 14, 2006
SECTION 3 - EMERGENCY PROCEDURES (continued)
Electrical Overload (Alternator over 20 amps above known electrical load)
ALTR................................................................................................................ON
BATT MASTR ..............................................................................................OFF
If alternator loads are reduced:
Electrical load ........................................................................reduce to minimum
NOTE
Due to increased system voltage and radio frequency noise,
operation with ALTR switch ON and BATT MASTR switch
OFF should be made only when required by an electrical
system failure.
If alternator loads are not reduced:
BATT................................................................................................................ON
ALT ................................................................................................................OFF
STBY ALTR ..............................................verify ON/check ammeter indication
NOTE
If the STBY ALTR ON annunciator is flashing then reduce
electrical loads until the annunciator no longer flashes.
If the standby alternator has failed or cannot provide adequate power, then
electrical power is dependent on available battery storage. Duration of battery
power available will be dependent on electrical load and battery condition prior
to failure. Execute Complete Electr
ical Failure checklist when battery is
depleted.
WARNING
Compass error may exceed 10 degrees with alternator
inoperative.
CAUTION
Any power interruption will result in loss of attitude
information from the PFD until the unit can be reinstated on
the ground.
NOTE
LO BUS VOLTAGE annunciator will be illuminated.
Anticipate complete electrical failure. Duration of battery
power available will be dependent on electrical load and
battery condition prior to failure.
SECTION 9
SUPPLEMENT 23 PA-28-181, ARCHER III
REPORT: VB-1611 ISSUED: JULY 12, 1995
9-168, 16 of 36 REVISED: FEBRUARY 14, 2006
SECTION 3 - EMERGENCY PROCEDURES (continued)
Electrical Overload (Alternator over 20 amps above known electrical load)
ALTR................................................................................................................ON
BATT MASTR ..............................................................................................OFF
If alternator loads are reduced:
Electrical load ........................................................................reduce to minimum
NOTE
Due to increased system voltage and radio frequency noise,
operation with ALTR switch ON and BATT MASTR switch
OFF should be made only when required by an electrical
system failure.
If alternator loads are not reduced:
BATT................................................................................................................ON
ALT ................................................................................................................OFF
STBY ALTR ..............................................verify ON/check ammeter indication
NOTE
If the STBY ALTR ON annunciator is flashing then reduce
electrical loads until the annunciator no longer flashes.
If the standby alternator has failed or cannot provide adequate power, then
electrical power is dependent on available battery storage. Duration of battery
power available will be dependent on electrical load and battery condition prior
to failure. Execute Complete Electr
ical Failure checklist when battery is
depleted.
WARNING
Compass error may exceed 10 degrees with alternator
inoperative.
CAUTION
Any power interruption will result in loss of attitude
information from the PFD until the unit can be reinstated on
the ground.
NOTE
LO BUS VOLTAGE annunciator will be illuminated.
Anticipate complete electrical failure. Duration of battery
power available will be dependent on electrical load and
battery condition prior to failure.
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