Service difficulty report · Torque Tube · Cessna 401

Difficulty date
January 10, 2001
Submitted
February 8, 2001
Operation
Air carrier
Aircraft
N4021Q
Make and model
Cessna 401
Aircraft serial
4010121
Part
Torque Tube
Part number
50450101
Condition
Cracked
Location
Lt Mlg
Part time
10,368 hours
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

WELD AT FORK BOLT THRU HOLE, HAD CRACK IN IT FOR SOME TIME , THAT WENT UNDETECTED. IT FINALLY PROGRESSED IN A SPIRAL PATTERN AND THE TUBE COMPLETELY FAILED.

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