Service difficulty report · Contact · Cessna 421B

Difficulty date
October 20, 2005
Submitted
December 2, 2005
Operation
General aviation
Make and model
Cessna 421B
Aircraft time
4,825 hours
Engine
Cont GTSIO520H
Propeller
Mcauly 3AF34C92
Part
Contact
Part number
231697
Condition
Melted
Location
Starter Relay
Stage of operation
NR
How discovered
O
Nature of condition
L, B
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ENGINE STARTER RELAY ARCING, CAUSED THE CONTACTS TO WELD TOGETHER SOLID. WHICH IN TURN CAUSED STARTER TO RUN CONTINOUSLY UNTIL IT OVERHEATED AND BURNED. POTENTIAL FOR ELECTRICAL FIRE IN ENGINE/WING ROOT.

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