CHART 7401. TROUBLESHOOTING (MAGNETO) (cont.)
ELECTRICAL POWER SUPPLY.
MAGNETOS.
INSPECTION OF MAGNETO.
— Note —
Comply with Bendix Service Bulletin No. 608 at first opportunity, but no later than
next magneto overhaul. Install self-locking cam retaining screw (10-391213) and
torque 21-25 inch-pounds. If self-locking screw is removed at any time, always
replace with new self-locking screw and torque to the specified value.
Trouble Cause Remedy
Low power and uneven Defective spark plugs. Clean and gap or replace
running. spark plugs.
Magneto breaker points not Clean points. Check internal
working properly. timing of magnetos.
Defective ignition wire. Check wire with electric
tester. Replace defective wire.
Defective spark plug terminal Replace connectors on spark
connectors. plug wire.
Failure of engine to develop Faulty ignition. Tighten all connections.
full power. Check system with tester.
Check ignition timing.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
7 4 - 11 - 0 1
Page 74-02
Revised: May 15, 1989
3F19
PIPER AIRCRAFT
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