Service difficulty report · Tq Signal Cond · Dhav DHC8311

Difficulty date
September 24, 1996
Submitted
March 26, 2000
Operation
Air carrier
Make and model
Dhav DHC8311
Engine
Pwa PW123
Part
Tq Signal Cond
Part number
30005000046
Condition
Faulty
Location
#2 Engine
Part time
11,715 hours
Component
Simmonds
Stage of operation
CL
Nature of condition
J
Precautionary procedure
A, E

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

What was found

(CAN) JUST AFTER TAKEOFF, DURING CLIMB OUT AT APPROXIMATELY 600 FEET WITH BOTH ENGINES AT 90 PERCENT TORQUE, THE #2 ENGINE HAD A UNCONTROLLABLE AUTOFEATHER WITH AN UPTRIM TO 105 PERCENT ON #1 ENGINE, #2 ENGINE OVERTORQUED TO 125 PERCENT FOR APPROXIMATELY 20 SECONDS. #1 TORQUE SIGNAL CONDITIONING UNIT (TSCU) FOUND TO BE AT FAULT AND REPLACED. #2 TSCU REPLACED AS A PRECAUTIONARY MEASURE. #2 PROPELLER WAS REPLACED DUE TO OVERTORQUE.