Service difficulty report · Bearing Cover · Bell 212

Difficulty date
February 2, 2000
Submitted
April 14, 2000
Operation
Air carrier
Make and model
Bell 212
Aircraft time
10,009 hours
Engine
Pwa PT6T3
Part
Bearing Cover
Part number
204011328003
Condition
Chafed
Location
Swashplate
Part time
8,411 hours
Component
Main Rotor Mast/ · Bell · 20401140025
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) DURING INSPECTION, THE SWASHPLATE BEARING COVER (P/N 204-011-428-003) WAS FOUND CHAFED THROUGH APPROX 330 DEGREES OF ITS CIRCUMFERENCE. THE CHAFING WAS CAUSED BY THE SEAL JUST BELOW THE BEARING COVER AS IT WAS RIDING HIGHER IN ONE SPOT WHICH CAUSED IT TO PLACE EXCESSIVE PRESSURE ON THE COVER AS THE OUTER RING OF THE SWASHPLATE AND THIS SEAL ROTATED BELOW THE BEARING COVER. THIS SEAL CAN BE DISLODGED BY OVERGREASING THE DUPLEX BEARINGS. COMPLETE SWASHPLATE AND SUPPORT ASSY WAS REPLACED.

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