Alternate Failure - Piper Cherokee Six 300 Information Manual

CHEROKEE SIX - 3OO
ALTERNATOR FAILURE
Loss of alternator output is detected through zero reading on the ammeter. Before
executing the fotlowing 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.
,, l.
Reduce Electrical Load.
2.
Alternator Circuit Breakers - Check
3.
"Alt" Switch - Off (for I second), then On
If the ammeter continues to indicate no output, or alternator will not stay reset, turn off
"Alt" switch, maintain minimum electrical load and land as soon as practical. All electrical load
is being supplied by the battery'
ENGINE ROUGHNESS
Engine roughness may be caused by dirt in the injector nozzles, induction system icing, or
ignition problems. To eliminate roughness, proceed as follows:
l.
Mixture - Adjust for maximum smoothness. Engine will run rough if too rich or too
Iean.
2. Alternate Air - On
3.
Electric Fuel Pump - On
4.
Fuel Selector - Change tanks to see if fuel contamination is the problem.
5.
Engine Gauges - Check for abnormal readings. If any gauge readings are abnormal,
proceed accordingly.
6,
Magneto Switch - "L" then "R," then back to "BOTH." If opcration is satisfactory
on either magneto, proceed on that magneto at reduced power, with mixture full rich,
to a lauding at the frst available airport-
If roughness persists, prepare for a precautionary landing at pilot's discretion.
EMERGENCY PROCEDURES
REVISED: JANUARY ll, 197 4
4-7