Service difficulty report · Collar · Beech 99

Difficulty date
June 18, 2001
Submitted
July 19, 2001
Operation
Air carrier
Aircraft
N4381Y
Make and model
Beech 99
Aircraft serial
U71
Aircraft time
37,440 hours
Engine
Pwa PT6A27
Part
Collar
Part number
1156100163
Condition
Cracked
Location
Left Elevator
Part time
37,440 hours
Component
Torque Tube · Beech
Component part number
115610014
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

DURING AN INSPECTION IT WAS DISCOVERED THAT THE LEFT OUTBOARD ELEVATOR TORQUE TUBE COLLAR HAD A CRACK EXTENDING FROM A TAPER PIN HOLE. A REVIEW OF THE MAINTENANCE INSTRUCTIONS REVEALED THE POSSIBILITY OF OVERTORQUE. THIS PARTICULAR PROBLEM COULD HAVE BEEN EITHER MAINTENANCE OR NORMAL WEAR. A DISCUSSION OF PROPER MAINTENANCE PROCEDURES REGARDING THE TORQUE TUBE TOOD PLACE WITH THE MECHANICS INVOLVED.

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