SDR CA011109015

Service difficulty report · Contactor · Dhav DHC8*

Difficulty date: November 4, 2001
Submitted: December 12, 2001
Operation: Air carrier
Make and model: Dhav DHC8*
Engine: Pwa PW123
Propeller: Hamstd 14SF23
System (JASC): 2420 · AC Generation System
Part: Contactor
Part number: 82450026
Condition: Burned
Location: Electrical
Stage of operation: CR
How discovered: O
Nature of condition: H
Precautionary procedure: O

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

What was found

(CAN) SPU AUXILIARY POWER LIGHT WAS FLICKERING IN FLIGHT. INVESTIGATION CARRIED OUT AND THREE 12 AWG WIRES FOUND CHAFED / BURNT INSIDE THE NR 2 AC CONTACTOR BOX. THE WIRE IDENTS ARE AS FOLLOWS:20005B12C-1, 20003B12B-1 AND 20001B12A-1. THESE WIRES GO BETWEEN CIRCUIT BREAKERS CB8 AND CB6 IN THE RT AC CONTACTOR BOX. THE CHAFF WAS FROM A BOLT ATTACHING A TERMINAL BLOCK TO THE BACK OF THE CONTACTOR BOX. REPAIR CARRIED OUT.