Service difficulty report · Grip · Bell 212

Difficulty date
May 10, 2011
Submitted
September 9, 2011
Operation
Air carrier
Make and model
Bell 212
Aircraft time
23,257 hours
Engine
Pwa PT6T3B
Part
Grip
Part number
204011121009G
Condition
Unserviceable
Location
Blade Bolt Bore
Part time
1,196 hours
Component
Mr Hub · Bell · 212540001
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

REQUIRED UT INSPECTION SHOWED CRACK INDICATIONS. GRIP WAS SENT TO MFG FOR EVALUATION. EVALUATION AS FOLLOWS, "GRIP WAS SENT IN FOR UT INSP FOR CRACK INDICATION, INSPECTED WITH BUSHINGS INSTALLED & REMOVED. INSPECTED BORES FOR DIAMETER AND FOUND LOWER TANG BORE 2.9015 HAS SCORING, UPPER TANG BORE 2.936 NO DAMAGE. PLEASE EVALUATE DISCREPANT BORE SIZE AND CONFIRM IF GRIP IS CANDIDATE FOR MFG OF OVERSIZE BUSHING REPAIR. GRIP IS MARKED AS FM ON DATA TAG. SUBJECT GRIP IS NON-REPAIRABLE DUE TO PREVIOUSLY OVER-SIZED BUSHING IS LARGER THAN APPROVED REPAIR ALLOWS. DO NOT RETURN TO SERVICE.

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