Service difficulty report · Controller · Boeing 777222

Difficulty date
December 1, 2010
Submitted
December 3, 2010
Operation
Air carrier
Aircraft
N224UA
Make and model
Boeing 777222
Aircraft serial
30225
Aircraft time
36,344 hours, 4,455 cycles
Engine
Pwa PW40903
Part
Controller
Part number
7858972
Part serial
31
Condition
Failed
Location
Window Heat
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

WINDOW HEAT L SIDE FAILURE OF LEFT NR 2 SIDE WINDSHIELD HEATING CIRCUIT (LOSS OF WINDOW COATING, WIRING OR THE INDIVIDUAL WHCU CIRCUIT FOR THAT WINDOW). STATUS MSG01- LATCHED CRUISE MODE DEPENDENT; WINDOW HEATER (LEFT NR 3) CIRCUIT IS OPEN OR SHORTED. DB- WINDOW HEAT CTRL UNIT (RFWD AND LSIDE) MSG02- LATCHED CRUISE MODE DEPENDENT; WINDOW HEAT CTRL UNIT (LFWD AND RSIDE) NR 2 SIDE WINDOW POWER IS NOT AVAILABLE. DB- WINDOW HEAT CONTROL UNIT (R FWD AND L SIDE) MSG-3023011 LATCHED ER MODE MSG-3022022 LATCHED ER MODE MSG-3022052 ACTIVE ER HARD MSG-3022002 ACTIVE ER HARD. REPLACED RT WINDOW HEAT CONTROL UNIT M3021 IAW MM.