Service difficulty report · Battery Pack · Boeing 737824

Difficulty date
June 20, 2025
Submitted
June 20, 2025
Operation
Air carrier
Aircraft
N76503
Make and model
Boeing 737824
Aircraft serial
33461
Aircraft time
58,161 hours, 21,784 cycles
Part
Battery Pack
Part number
ADD71701100
Condition
Malfunctioned
Location
Zone 200
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

3 EMERGENCY LIGHT CIRCUIT SECTIONS FAILED TO STAY ON PAST 15 MIN FOR EMERGENCY LIGHTING FUNCTIONAL CHECK AFFIILATED WITH EMER BATTERY PACKS M1694, M1670, M1673. BATTERY PACKS M1694, M1670, M1673 FAILED DURING EMERGENCY LIGHT SYSTEM OPERATIONAL CHECK 29-3350-1-7500 REF N/R 2730533 FOR ALL WORK PERFORMED. FOUND ADDITIONAL BATTERY PACK M1676 FAILED ALSO. REMOVED AND REPLACED BATTERY PACKS M1676, M1694, M1670 AND M1673. REF AMM: 33-51-06-960-805 SYS. OPERATES NORMAL.