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SDR CALA2021080401250

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Service difficulty report · Battery Pack · Boeing 777222

FAA SDR system

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
D71701100
Part serial
137796
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.9446466,ORIGINATED BY EMP V90535 9,SPEC NO.B777-33-3-7024. PERFORMED BY EMP V905359,REPLACED LLAR POWER SUPPLY BATTERY PACK AND CARRIED OUT LIGHT TEST,THE RESULT WAS NORMAL REF AMM 33-29- 01-960-809 REV 92A,IDT BY TA472.