CHART 3901. TROUBLESHOOTING (ANNUNCIATOR PANEL)
Trouble Cause Remedy
All lights fail to operate. No current. Check all wire segments, connections
and the receptacle at the side of
the annunciator panel.
All the warning lights fail to Test switch grounded out. Check terminals and replace
extinguish after engine is switch if necessary.
running.
Oil or gyro air warning light Sensor activates at too high Replace.
fails to extinguish. a setting.
Sensor terminals bridged. Remove material between terminals.
Defective sensor. Replace.
Oil or gyro air warning light Lamp burned out. Replace.
fails to operate.
Sensor activates at too low Replace.
a setting.
Defective sensor. Replace.
Overboost warning light fails Manifold pressure gauge Check sensor activation. Sensors
to extinguish. sensors set too low. should activate at 36.1 to 36.5 inches
of mercury.
Overboost warning light fails Lamp burned out. Replace.
to activate.
Defective sensor switches. Check. Replace gauge as necessary.
Alternator warning light fails Lamp burned out. Replace.
to operate.
Alternator warning light fails Circuit breake tripped. Reset, if it trips a second time, check
to extinguish. CB, replace if defective.
Defective alternator output circuit. Check and repair.
Test switch fails to activate Bad switch or connections. Check wires and replace
warning lights. switch if necessary.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
3 9 - 1 2 - 0 1
Page 39-02
Revised: May 15, 1989
2K22
PIPER AIRCRAFT
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