Service difficulty report · Bearing Race · Bell 206L1

Difficulty date
January 17, 2006
Submitted
June 6, 2006
Operation
General aviation
Make and model
Bell 206L1
Aircraft time
6,895 hours
Engine
Allsn 250C28B
Part
Bearing Race
Part number
206011111003
Condition
Corroded
Location
M/R Trunnion
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

(CAN) ON A SCHEDULED 1200 HR M/R CORROSION INSPECTION THE INNER RACE OF THE M/R TRUNNION BEARING WAS FOUND TO BE SEVERLY CORRODED TO THE POINT THAT THE INNER RACE WAS CRACKED. THIS BEARING RACE IS THERMALLY PRESS FIT AND THE TIGHT TOLLERANCE, SEVERE CORROSION AND FLIGHT LOADS CAUSED THIS RACE TO CRACK (TC NR 20060120002)

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