TM 55-1510-219-10
of a generator or one of its associated circuits
(generator control unit). If one generator system
becomes inoperative, all nonessential electrical
equipment should be used judiciously to avoid
overloading the remaining generator. The use of
accessories which create a very high drain should be
avoided. If both generators are shut off due to either
generator system failure or engine failure, all
nonessential equipment should be turned off to
preserve battery power for extending the landing
gear and wing flaps. When a DC GEN light
illuminates, perform the following:
1.
Generator switch-OFF, RESET, then ON.
2.
Generator switch (no reset)-OFF.
3.
Mission control switch-OVERRIDE.
4.
Operating loadmeter-100% maximum.
b.
Both DC GEN Lights Illuminated.
1.
All nonessential equipment-OFF.
2.
Land as soon as practicable.
c.
Excessive
Loadmeter
Indication
(Over
100%). If either loadmeter indicates over 100%,
perform the following:
1.
Battery switch-OFF (monitor loadmeter).
2.
Loadmeter
over
100%-Nonessential
electrical equipment OFF.
3.
Loadmeter under 100%-BATT switch ON.
d.
Inverter Light Illuminated. Illumination of the
#1 or #2 AIRCRAFT INVERTER caution light
indicates failure of the affected inverter. When
either inverter fails, the total aircraft load is
automatically switched to the remaining inverter.
When a #1 or #2 AIRCRAFT INVERTER light
illuminates, perform the following:
1.
Affected AIRCRAFT INVERTER switch-OFF.
e.
INST AC Light Illuminated. Illumination of
the INST AC warning light indicates that 26 VAC
power is not available. All items connected to the 26
VAC bus will be inoperative. Under these conditions,
power must be controlled by indications of the N1
and TGT gages. Perform the following:
1.
N1 and TGT indications-Check.
2.
Other engine instruments-Monitor.
f:
Circuit Breaker Tripped. If the circuit breaker
is for a nonessential item, do not reset in flight. If the
circuit breaker is for an essential item, the circuit
breaker may be reset once. If a bus feeder circuit
breaker (on the overhead circuit breaker panel) trips,
a short is indicated. Do not reset in flight. If a circuit
breaker trips, perform as follows:
1.
BUS FEEDER breaker tripped-Do not reset.
2.
Nonessential circuit-Do not reset.
3.
Essential circuit-Reset once.
g.
BATTERY CHARGE Light Illuminated.
1.
Battery volt-amp meter Check.
a.
Amp reading above 7 amps and
decreasing Monitor.
b.
Amp reading above 7 amps and
increasing Battery switch OFF.
2.
Battery switch ON (for landing prior to
gear/flap extension).
9-29. EMERGENCY DESCENT.
Emergency descent is a maximum effort in
which damage to the aircraft must be considered
secondary to getting the aircraft down. The following
procedure assumes the structural integrity of the
aircraft and smooth flight conditions. If structural
integrity is in doubt, limit speed as much as possible,
reduce rate of descent if necessary, and avoid high
maneuvering loads. For emergency descent,
perform the following:
NOTE
Windshield defogging may be
required.
1.
Power lever-IDLE.
2.
Propeller lever-HIGH RPM.
3.
Flap lever-APPROACH.
4.
Gear-DN.
5.
Airspeed-184 KIAS maximum.
9-11