SDR HNAA2011022000034

Service difficulty report · Tscu · Dhav DHC8103

Difficulty date: February 16, 2011
Submitted: February 21, 2011
Operation: Air carrier
Aircraft: N336EN
Make and model: Dhav DHC8103
Aircraft serial: 336
Aircraft time: 41,931 hours, 48,164 cycles
System (JASC): 6123 · Propeller Feathering/Reversing
Part: Tscu
Part number: 30005000024
Part serial: 4047
Condition: Failed
Location: Nr 1
Stage of operation: CL
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

AFTER TAKEOFF, AUTO FEATHER ARM FAILED TO DESELECT. CHECKED SWITCH 6121 S7, S8, S9, S19, S11. RESOLDERED 612149L22 TO SWITCH 6121S6. CHECKED FOR GROUND IN THE ENABLE CIRCUIT AT BOTH TSCU'S P6 AND P7 PIN 8 AND 1. NO DEFECTS NOTED. R & R NR 1 TSCU IAW 72-01-10. OPS CHECKED GOOD.