Service difficulty report · Control Unit · Boeing 747451

Difficulty date
August 22, 2012
Submitted
August 24, 2012
Operation
Air carrier
Aircraft
N105UA
Make and model
Boeing 747451
Aircraft serial
26473
Aircraft time
74,691 hours, 8,806 cycles
Engine
Pwa PW4056
Part
Control Unit
Part number
1167007141
Part serial
3386
Condition
Malfunctioned
Location
Cabin
Stage of operation
IN
How discovered
O
Nature of condition
N
Precautionary procedure
K

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

What was found

CONTINUOUS CHIME FROM DOOR-3L LAV FORWARD UNIT. REPLACED IOEU ABOVE LAV. SYSTEM OPS OKAY.