3.17 ALTERNATOR FAILURE
Loss of alternator output is detected through zero reading on the
ammeter and illumination of the alternator warning light on the instrument
panel. Before executing the following procedure, insure that the reading is
zero and not merely low by actuating an electrically powered device, such as
the landing light. If no increase in the ammeter reading is noted, alternator
failure can be assumed.
The electrical load should be reduced as much as possible. Check the
alternator circuit breaker for a popped circuit breaker.
The next step is to attempt to reset the overvoltage relay. This is
accomplished by turning the ALT switch OFF for one second and then ON.
If the trouble was caused by a momentary overvoltage condition (16.5 volts
and up), this procedure should return the ammeter to a normal reading.
If the ammeter continues to indicate zero output, or if the alternator
will not remain reset, turn off the ALT switch, maintain minimum electrical
load and land as soon as practical. All electrical load is being supplied by
the battery.
3.19 SPIN RECOVERY (UNINTENTIONAL SPIN)
Intentional spins are permitted only with flaps fully retracted for
utility category operation. Should a spin be entered inadvertently, the
following procedure should be initiated:
(a) Neutralize the ailerons.
(b) Apply and maintain full rudder opposite the direction of rotation.
(c) As the rudder hits the stop, push the control wheel fully forward.
A s t h e s t a l l i s b r o k e n , r e l a x f o r w a r d p r e s s u r e t o p r eve n t
a n ex c e s s ive a i r s p e e d bu i l d u p .
(d) Close the throttle.
(e) As rotation stops, neutralize the rudder and ease back on the
control wheel to recover smoothly from the dive.
(f) Retract the flaps if they have been extended.
SECTION 3
PIPER AIRCRAFT CORPORATION
EMERGENCY PROCEDURES
PA-38-112, TOMAHAWK
REPORT: 2126
ISSUED: JANUARY 20, 1978
3-12
REVISED: DECEMBER 18, 1978
3.17 ALTERNATOR FAILURE
Loss of alternator output is detected through zero reading on the
ammeter and illumination of the alternator warning light on the instrument
panel. Before executing the following procedure, insure that the reading is
zero and not merely low by actuating an electrically powered device, such as
the landing light. If no increase in the ammeter reading is noted, alternator
failure can be assumed.
The electrical load should be reduced as much as possible. Check the
alternator circuit breaker for a popped circuit breaker.
The next step is to attempt to reset the overvoltage relay. This is
accomplished by turning the ALT switch OFF for one second and then ON.
If the trouble was caused by a momentary overvoltage condition (16.5 volts
and up), this procedure should return the ammeter to a normal reading.
If the ammeter continues to indicate zero output, or if the alternator
will not remain reset, turn off the ALT switch, maintain minimum electrical
load and land as soon as practical. All electrical load is being supplied by
the battery.
3.19 SPIN RECOVERY (UNINTENTIONAL SPIN)
Intentional spins are permitted only with flaps fully retracted for
utility category operation. Should a spin be entered inadvertently, the
following procedure should be initiated:
(a) Neutralize the ailerons.
(b) Apply and maintain full rudder opposite the direction of rotation.
(c) As the rudder hits the stop, push the control wheel fully forward.
A s t h e s t a l l i s b r o k e n , r e l a x f o r w a r d p r e s s u r e t o p r eve n t
a n ex c e s s ive a i r s p e e d bu i l d u p .
(d) Close the throttle.
(e) As rotation stops, neutralize the rudder and ease back on the
control wheel to recover smoothly from the dive.
(f) Retract the flaps if they have been extended.
SECTION 3
PIPER AIRCRAFT CORPORATION
EMERGENCY PROCEDURES
PA-38-112, TOMAHAWK
REPORT: 2126
ISSUED: JANUARY 20, 1978
3-12
REVISED: DECEMBER 18, 1978