Service difficulty report · Relay · Bell 407

Difficulty date
June 26, 2013
Submitted
September 14, 2015
Operation
General aviation
Make and model
Bell 407
Aircraft time
4,651 hours
Engine
Allsn 250C47B
Part
Relay
Part number
SM20ACD300A21
Condition
Failed
Location
Starter
Stage of operation
TX
How discovered
O
Nature of condition
Y, J
Precautionary procedure
O

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

What was found

(CAN) THE MAIN STARTER RELAY HAS THREE SETS OF CONTACTS INSIDE. THE MAIN CONTACTS AND 2 MICROSWITCHES FOR THE IGNITION SYSTEM. THE MICROSWITCH FOR THE IGNITION RELAY HAS FAILED AND THIS SEEMS TO BE A RECURRING PROBLEM. THESE MICROSWITCHES DON`T SEEM TO LAST A YEAR WITHOUT BECOMING INTERMITTENT OR FAILING COMPLETELY.

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