SDR CA101020002

Service difficulty report · Torque Sensor · Beech B100

Difficulty date: September 27, 2010
Submitted: January 4, 2011
Operation: Air carrier
Make and model: Beech B100
Aircraft time: 10,616 hours
Engine: Garrtt TPE3316252B
Propeller: Hartzl HCB4TN5
System (JASC): 7712 · Engine BMEP/Torque Indicating
Part: Torque Sensor
Part number: 31017263
Condition: Broken
Location: Spur Gearshaft
Part time: 4,699 hours
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

THE TORQUE SENSOR ASSY PN 3101726-3 FAILED. GEAR, PN 3103589-1, WAS FOUND WITH THE INTERNAL SPLINES STRIPPED. SPLINED DRIVE GEARSHAFT, PN 3103405-2, WAS ALSO FOUND STRIPPED. WHEN THESE PARTS FAILED THE INTEGRITY OF THE FCU DRIVE TRAIN WAS LOST AND THE ENGINE SUBSEQUENTLY FLAMED OUT.

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