Service difficulty report · Wire · Boeing 747422

Difficulty date
May 14, 2010
Submitted
May 14, 2010
Operation
Air carrier
Aircraft
N175UA
Make and model
Boeing 747422
Aircraft serial
24382
Aircraft time
77,730 hours, 8,822 cycles
Engine
Pwa PW4056
Part
Wire
Condition
Shorted
Location
Windshield
Stage of operation
NR
How discovered
9
Nature of condition
B
Precautionary procedure
O

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

What was found

CAPT ADJUSTING SUNSHADE INADVERTANTLY HIT WIRE ON TERMINAL BLOCK OF WINDOW 1L CAUSING SPARKS. CB FOR WINDOW HEAT POPPED AT THE SAME TIME, POSSIBLE LOOSE WIRE ON TERMINAL BLOCK. FOUND SHORT JUMPER WIRES ON TRIPLEX WINDSHIELDS NOT CONNECTED TERMINAL FOR BOTH LT AND RT WINDSHIELD. LT WINDOW HEAT CONTROLLER MADE STATUS MSG CAUSING SPARK JUMPER WIRE. SECURED WIRE IAW MM. ALSO, REPLACED L-WINDOW HEAT CONTROLLER IAW MM. TEST PASSED. INSTALLED JAL NON-POOL.