Service difficulty report · Transmission · Bell 407

Difficulty date
April 23, 2017
Submitted
April 24, 2017
Operation
General aviation
Aircraft
N520MT
Make and model
Bell 407
Aircraft serial
53805
Aircraft time
5,311 hours, 15,768 cycles
Part
Transmission
Part number
407040006115FM
Part serial
A663
Condition
Making Metal
Part time
5,311 hours
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

TRANSMISSION CHIP INDICATION IN FLIGHT EN-ROUTE TO HOSPITAL. A PRECAUTIONARY LANDING WAS MADE IN A FIELD. THE TRANSMISSION CHIP DETECTORS AND FREEWHEELING UNIT CHIP DETECTOR WERE REMOVED AND INSPECTED. ONE SMALL SLIVER WAS FOUND. CHIP DETECTOR WAS CLEANED AND A SUBSEQUENT 20 MINUTE GROUND RUN COMPLETED WITH NO FURTHER INDICATIONS. AIRCRAFT WAS RETURNED TO SERVICE

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