Service difficulty report · Inverter · Boeing 777222

Difficulty date
October 4, 1996
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N776UA
Make and model
Boeing 777222
Aircraft serial
26937
Engine
Pwa PW4077
System (JASC)
2422 · AC Inverter
Part
Inverter
Part number
90670903790012
Condition
Failed
Location
Cacp
Component
Boeing · 285W00122
Stage of operation
CR
Nature of condition
B
Precautionary procedure
F, H

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

What was found

SMOKE REPORTED COMING FROM BEHIND THE CABIN AREA CONTROL PANEL AT DOOR 2 LEFT. DISCHARGED TWO HALON FIRE BOTTLES, SMOKE STOPPED. CIRCUIT BREAKERS PULLED AT P210 PANEL. *S/D* OPEN CIRCUIT CONDITION FOR BOTH FLUORESCENT BACKLIGHTS CAUSED TRANSFORMER (906-70903-7) AND POWER FET'S (900-12472-012) TO OVERHEAT AND FAIL EMITTING SMOKE. NO EVIDENCE OF FLAME. BOEING TO RELEASE ADVISORY TO REPLACE CACP/CSCP TOUCHSCREEN IF DISPLAY BECOMES DIM, ONE FLUORESCENT BACKLIGHT OPEN.