Service difficulty report · Bearing · Bell 407

Difficulty date
December 15, 2011
Submitted
September 14, 2015
Operation
General aviation
Make and model
Bell 407
Engine
Allsn 250C47B
Part
Bearing
Condition
Loose
Location
Gearbox
Part time
1,544 hours
Stage of operation
NR
How discovered
9
Nature of condition
O
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 2.5 BEARING CAGE NUTS WERE FOUND LOOSE AND 1 STUD STARTED TO BACK OUT. THE TORQUEMETER SUPPORT FLANGE, PN 6889191 IS RETAINED BY 4 NUTS. 2 OF THE NUT/STUDS ASSY WERE FOUND LOOSE. 1 NUT WAS LOOSE. ONLY 1 NUT WAS TIGHT. THE 1 NUT THAT WAS FOUND TIGHT IS NOT INDICATED. THE GEARBOX HAS NOT BEEN OVERHAULED OR REPAIRED.

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