Service difficulty report · Bolt · Boeing 234

Difficulty date
August 28, 2015
Submitted
September 1, 2015
Operation
General aviation
Make and model
Boeing 234
Aircraft serial
MJ022
Aircraft time
23,548 hours
Engine
Lyc AL5512
Part
Bolt
Part number
BACB30US612
Condition
Cracked
Location
Aft Trasmission
Stage of operation
IN
How discovered
9
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

DURING DISASSEMBLY OF COMPONENT IT WAS NOTICED THERE IS SEVERE SCUFFING ON BOTH THE SPIRAL BEVEL RING GEAR AND THE SPIRAL BEVEL PINION GEAR. AT DISASSEMBLY, 2 BOLTS WERE FOUND CRACKED AFTER FAILING TORQUE CHECK ON WING. THIS BOLTED JOINT HAS NOT HAD THE UPDATED TORQUE APPLIED SINCE ITS LAST SHOP VISIT.

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