Service difficulty report · Wire · Boeing 747451

Difficulty date
March 21, 2012
Submitted
April 20, 2012
Operation
Air carrier
Aircraft
N105UA
Make and model
Boeing 747451
Aircraft serial
26473
Aircraft time
72,911 hours, 8,637 cycles
Engine
Pwa PW4056
Part
Wire
Condition
Damaged
Location
Apu
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

APU SHUT DOWN. FOUND WIRE FROM PIN A12 CONNECTOR DM7847CA TO CONNECTOR D95004 PIN E SHORT TO SHIELD. ALSO SEVERAL WIRES IN SAME HARNESS FOUND DAMAGED. RPL'D APU BAY HARNESS W7242 AND CLAMPS WDM AND MM. APU START, RUN, AND SHUTDOWN NORMAL.