Service difficulty report · Contactor · Bell 206L1

Difficulty date
September 6, 2005
Submitted
November 1, 2005
Operation
General aviation
Make and model
Bell 206L1
Aircraft time
6,829 hours
Engine
Allsn 250C28
Part
Contactor
Part number
SM20ACD200A21
Condition
Burned
Location
Battery
Stage of operation
CR
How discovered
O
Nature of condition
B, H
Precautionary procedure
H, A

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

What was found

(CAN) DURING CRUISE PORTION OF A SHORT (15 MIN) CREW TRANSFER FLIGHT, THE PILOT AND 2 PASSENGERS ABOARD SMELLED/SAW FUMES/SMOKE IN COCKPIT. ELECTRICAL SYSTEMS WERE SHUTDOWN AND AN UNEVENTFUL LANDING WAS CARRIED OUT NEAR CAMP SITE. UPON INVESTIGATI ON, IT WAS DISCOVERED THAT THE FORWARD BODY RETENTION SCREW AND INSERT HAD BECOME DISBONDED AND WORKED UP INTO CONTACTS SHORTING THE POSITIVE TERMINAL TO GROUND, VAPOURIZING THE INSERT AND PORTION OF SCREW AND BURNING THE SURROUNDING AREA. BETTER INTERNAL BONDING AND/OR COVERING OF THE INSERT COULD HAVE PREVENTED SAID MALFUNCTION.

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