Service difficulty report · Torque Tube · Cessna 550

Difficulty date
February 20, 2014
Submitted
September 14, 2015
Operation
General aviation
Make and model
Cessna 550
Aircraft time
3,936 hours
Engine
Pwa PW530A
Part
Torque Tube
Part number
TORQUETUBE
Condition
Cracked
Location
Nlg Door
Part time
3,936 hours
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

(CAN) DURING SCHEDULED MAINTENANCE INSPECTION FOUND NLG TORQUE TUBE RT ATTACHMENT PLATE. FORWARD FILLET WELD CRACKED. NDT, EDDY CURRENT, OF SUSPECTED AREA CARRIED OUT. CRACKS CONFIRMED. FURTHER INVESTIGATION CARRIED OUT AND FOUND NLG DOORS MISRIGGED CAUSING EXCESSIVE FORCE BEING APPLIED TO TORQUE TUBE FILLET WELDS. NLG DOOR RETRACTION SYSTEM RE-RIGGED, TORQUE TUBE REPLACED WITH NEW.

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