Piper ARCHER III - Page 323

SECTION 9
PA-28-181, ARCHER III SUPPLEMENT 20
ISSUED: JULY 12, 1995 REPORT: VB-1611
REVISED: JANUARY 9, 2006 13 of 30, 9-121
SECTION 3 - EMERGENCY PROCEDURES (continued)
Alternator Failure
Indication: Alternator Inop annunciator light illuminated and zero
current displayed on MFD alternator indication source.
NOTE
Anytime the bus voltage is below 25 Vdc, the Low Bus
Voltage annunciator will be illuminated.
Verify Failure................................................................................Check ammeter
If ammeter shows zero:
ALTR switch ..................................................................................................OFF
Reduce electrical load to minimum:
ALTNR FIELD C/B..........................................CHECK and RESET as required
ALTR Switch ..................................................................................................ON
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
Consider using the autopilot to reduce workload. Using the
GPSS mode can assist in maintaining a flight-planned route.
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
PA-28-181, ARCHER III SUPPLEMENT 20
ISSUED: JULY 12, 1995 REPORT: VB-1611
REVISED: JANUARY 9, 2006 13 of 30, 9-121
SECTION 3 - EMERGENCY PROCEDURES (continued)
Alternator Failure
Indication: Alternator Inop annunciator light illuminated and zero
current displayed on MFD alternator indication source.
NOTE
Anytime the bus voltage is below 25 Vdc, the Low Bus
Voltage annunciator will be illuminated.
Verify Failure................................................................................Check ammeter
If ammeter shows zero:
ALTR switch ..................................................................................................OFF
Reduce electrical load to minimum:
ALTNR FIELD C/B..........................................CHECK and RESET as required
ALTR Switch ..................................................................................................ON
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
Consider using the autopilot to reduce workload. Using the
GPSS mode can assist in maintaining a flight-planned route.
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.