SECTION 3
PIPER AIRCRAFT CORPORATION
EMERGENCY PROCEDURES
PA-28-161, CHEROKEE WARRIOR II
3.19 LOSS OF FUEL PRESSURE
If loss of fuel pressure occurs, turn “ON” the electric fuel pump and check that the fuel selector is on a
full tank.
If the problem is not an empty tank, land as soon as practical and have the engine-driven fuel pump and
fuel system checked.
3.21 HIGH OIL TEMPERATURE
An abnormally high oil temperature indication may be caused by a low oil level, an obstruction in the oil
cooler, damaged or improper baffle seals, a defective gauge, or other causes. Land as soon as practical at an
appropriate airport and have the cause investigated.
A steady, rapid rise in oil temperature is a sign of trouble. Land at the nearest airport and let a mechanic
investigate the problem. Watch the oil pressure gauge for an accompanying loss of pressure.
3.23 ELECTRICAL FAILURES
Loss of alternator output is detected through zero reading on the ammeter. Before executing the follow-
ing 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 breakers for a
popped circuit.
The next step is to attempt to reset the overvoltage relay. This is accomplished by moving the ALT switch
to OFF for one second and then to 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 “O” 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.
3.24 ELECTRICAL OVERLOAD (Alternator over 20 amps above known electrical load)
If abnormally high alternator output is observed (more than 20 amps above known electrical load for the
operating conditions) it may be caused by a low battery, a battery fault or other abnormal electrical load. If the
cause is a low battery, the indication should begin to decrease toward normal within 5 minutes. If the overload
condition persists attempt to reduce the load by turning off non-essential equipment. For airplanes with inter-
locked BATT and ALT switch operation, when the electrical load cannot be reduced turn the ALT switch
OFF and land as soon as practical. The battery is the only remaining source of electrical power. Also
anticipate complete electrical failure.
REPORT: VB-880
ISSUED: DECEMBER 16, 1976
3-10
REVISED: DECEMBER 18, 1980
Summary of Contents for CHEROKEE WARRIOR II
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