GRUMMAN AMERICAN
FOR TRAINING USE ONLY – SECTION 3
MODEL GA-7/COUGAR
EMERGENCY PROCEDURES
3-33
Issued: April 10, 1978
FUEL SYSTEM EMERGENCY PROCEDURES
ENGINE-DRIVEN FUEL PUMP FAILURE
In the event of an engine-driven fuel pump failure, turn the associated auxiliary fuel pump ON.
Extended flight without a backup fuel pressure source is not advisable. Land the airplane as soon as practical.
ELECTRICAL SYSTEM EMERGENCY PROCEDURES
ALTERNATOR FAILURE (SINGLE)
In the event an alternator failure light comes on, take immediate steps to reduce the load on the electrical system
to within the capability of the remaining alternator by turning off all non-essential loads. Check the alternator
circuit breakers. If a circuit breaker is tripped, turn the affect alternator switch OFF and reset the circuit breaker.
Turn the alternator switch ON.
If the circuit breaker trips again, turn the alternator switch OFF.
If the circuit breaker does not trip, observe the ammeter for the failed alternator. If the output is within normal
limits, but the alternator failure light is on, disregard the light and have the circuit checked after landing. If the
alternator output is insufficient, turn the alternator OFF and adjust the electrical load to within the capacity of the
remaining alternator. If there is no output from the failed alternator, check the FLD circuit breaker for the
alternator and reset if necessary. If an intermittent light indication is observed, coupled with output fluctuation
from the alternator, turn the alternator OFF and adjust the electrical load to within the capacity of the remaining
alternator.
ALTERNATOR FAILURE (DUAL)
In the event of a dual indication of alternator failure, turn off all electrical loads and turn off the alternators.
If the alternator circuit breakers are tripped, reset them one at a time. Turn on the left alternator and monitor the
output. If there is an output, leave the alternator on and disregard the failure light if it is still illuminated. If there
is no alternator output, turn the alternator back off. Turn on right alternator and monitor the output. If there is an
output, leave the alternator on and disregard the failure light if it is illuminated. If there is no alternator output,
turn the alternator back off. Prepare to terminate flight as soon as practical since all electrical power except
engine ignition is being supplied by the battery.
If alternator output is regained, turn on essential loads one at a time and monitor output carefully. Terminate
flight as soon as practical.
TOTAL ELECTRICAL FAILURE
In the event of a total electrical failure, remove all electrical loads and recycle the Master Switch from ON to OFF
and back to ON. Add electrical loads as required.
INSTRUMENT AIR PRESSURE SYSTEM FAILURES
Instrument air pressure is maintained by two engine-driven air pumps. If either pump completely fails or the
associated engine is feathered, a red button will show on the corresponding side of the pressure indicator.
Normally, pressure to the instruments will be maintained by the operating pump, as evidenced by a pressure
reading of at least 4.3 inches of mercury (in. Hg). Air-driven instrument operation will be maintained within
normal limits as long as this pressure is maintained by the operating pump.
