SDR CALA2021080401249

Service difficulty report · Battery Pack · Boeing 777222

Difficulty date: August 3, 2021
Submitted: August 4, 2021
Operation: Air carrier
Aircraft: N784UA
Make and model: Boeing 777222
Aircraft serial: 26951
Aircraft time: 101,039 hours, 13,238 cycles
System (JASC): 3350 · Emergency Lighting
Part: Battery Pack
Part number: D71702030
Part serial: 3027
Condition: Discharged
Location: Emergency Lights
Stage of operation: IN
How discovered: C
Nature of condition: L
Precautionary procedure: K

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

What was found

LLAR BACK-UP LIGHT BATTERY PACK DOESN''T OPERATE DURING FUNCTIONA L TEST REF HAECO NON-ROUTINE NO.9450068,ORIGINATED BY EMP V90535 9,SPEC NO.B777-33-3-7024. PERFORMED BY EMP V905359,REPLACED LLAR POWER SUPPLY BATTERY CHAR GER AND CARRIED OUT LIGHT TEST,THE RESULT WAS NORMAL REF AMM 33- 29-01-960-809 REV92A,IDT BY TA472.