SDR HNAA0300089

Service difficulty report · Autofeather Sys · Dhav DHC8201

Difficulty date: December 28, 2003
Submitted: December 31, 2003
Operation: Air carrier
Aircraft: N985HA
Make and model: Dhav DHC8201
Aircraft serial: 479
Aircraft time: 11,457 hours, 12,543 cycles
System (JASC): 6123 · Propeller Feathering/Reversing
Part: Autofeather Sys
Condition: Malfunctioned
Stage of operation: TO
How discovered: V
Nature of condition: P
Precautionary procedure: C

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

What was found

AUTOFEATHER FAILS TO ARM ON TAKEOFF. MECHANIC TRIMS ENGINES AND AUTO FEATHER ARMS AT 83-85 TQ, SHUT DOWN ENGINE POWER, DOWN UP AND NEXT ENGINE RUN, AUTO FEATHER REVERTS TO ARMING AT 100-103 TQ. AUTOFEATHER FAILED TO ARM ON TAKE OFF ROLL AGAIN. MECHANIC PREFORMED LRU CODE VERIFICATION, ECU SETUP AND CENTER TRIM ECU, PERFORMED ENGINE TRIM AND AUTO FEATHER ARMS AS REQUIRED.