Service difficulty report · Buss Bar · Bombdr DHC8400

Difficulty date
July 28, 2003
Submitted
November 21, 2003
Operation
General aviation
Make and model
Bombdr DHC8400
Engine
Pwc PW150A
Propeller
Rotol CR4086123F17
Part
Buss Bar
Part number
697070212
Condition
Shorted
Location
Nr 6 Blade
Component
Hub Assy · 697071234
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) DURING CRUISE THE AC GEN NR 2 CAUTION LIGHT CAME ON TOGETHER WITH (PROP DEICE) CAUTION LIGHT. GEN AND PROP DEICE RESET ACC. TO QRH. AFTER APPROX. 5-10 SEC. BOTH (AC GEN NR 1) AND (AC GEN NR 2) CAUTION LIGHTS CAME ON WITH ASSOCIATED BUS FAULT CAUTION LIGHTS. 2ND ATTEMPT TO RESET GEN NOT TRIED. DESCENT STARTED TO LEAVE ICING COND. AFTER QRH CHECKLIST COMPLETED. NORMAL LANDING WITHOUT AC PWR. INVESTIGATION/ACTION TROUBLESHOOTING IDENTIFIED THE FAULT TO BE BUSS BARS P/N 697070212 AND 697070213 ON BLADE NO 6. THE BUS BARS HAD APPARENTLY BEEN LOOSE AND IN CONTACT WITH EACH OTHER, THERE BY CAUSING A SHORT BETWEEN THE PHASES OF AC POWER.