Service difficulty report · Control Unit · Dhav DHC8102

Difficulty date
June 1, 2012
Submitted
September 14, 2015
Operation
General aviation
Make and model
Dhav DHC8102
Aircraft time
57,952 hours
Engine
Pwa PW120A
Propeller
Hamstd 14SF7
Part
Control Unit
Part number
30005000034
Condition
Failed
Location
Auto Feather
Part time
36,656 hours
Stage of operation
TO
How discovered
O
Nature of condition
R
Precautionary procedure
C

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

What was found

(CAN) THE NR 2 ENGINE AUTO-FEATHERED WHEN POWER WAS APPLIED FOR TAKEOFF. INVESTIGATION REVEALED THAT THE NR 1 TORQUE SENSOR CONDITIONING UNIT WAS LATCHED IN TEST MODE. THE NR 1 TSCU WAS REPLACED AND GROUND RUNS CARRIED OUT. THE ACFT WAS RETURNED TO SERVICE.