Service difficulty report · Bearing · Bell 407

Difficulty date
August 3, 2011
Submitted
September 14, 2015
Operation
General aviation
Make and model
Bell 407
Aircraft time
2,501 hours
Engine
Allsn 250C47B
Part
Bearing
Condition
Failed
Location
Gearbox
Part time
2,373 hours
Stage of operation
LD
How discovered
O
Nature of condition
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) ENGINE CHIP LIGHT ILLUMINATED UPON SHORT FINAL FOR LANDING. CHIP PLUGS EXAMINED AND FOUND CONTAMINATED. REPAIR STATION CONTRACTED TO INSPECT AND REPAIR AS REQUIRED. IT WAS SUBSEQUENTLY FOUND THAT THE BEARING SUPPORTING THE REAR OF THE PTO GEAR HAD 1 BALL THAT HAD FAILED AND WAS THE CAUSE OF THE METAL CONTAMINATION. THE GEARBOX WAS INSPECTED AND REPAIRED ON SITE WITH THE SUBJECT BEARING BEING REPLACED WITH NEW.

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