Service difficulty report · Battery Pack · Boeing 737724

Difficulty date
November 12, 2025
Submitted
November 17, 2025
Operation
Air carrier
Aircraft
N33714
Make and model
Boeing 737724
Aircraft serial
28785
Aircraft time
83,710 hours, 31,018 cycles
Part
Battery Pack
Part number
ADD71701100
Condition
No Test
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

EMERGENCY LIGHT BATTERY PACK M1675 FAILED CAPACITY CHECK.POWER SUPPLY - BATTERY PACK CAPACITY CHECK POWER SUPPLY - BATTERY PACK CAPACITY CHECK - REPLACED BATTERY PACK IN M1675 POWER SUPPLY. RE-RAN CAPACITY CHECK ON M1675, LASTED ONLY 10 MINUTES. CONTINUED DISCHARGE FOR DEEP-CYCLE. STARTED RECHARGE AT 0630L. RECOMMEND RETEST AFTER 0930L OR REPLACE BATTERY PACK AGAIN. FORWARD CEILING LIGHT ASSY REMAINS REMOVED. EMERGENCY LIGHT BATTERY PACK M1675 PASSES CAPACITY CHECK AFTER DEEP CYCLE. M.M. 33-51-06-200-801. ENTRY LIGHT ASSY STILL REMOVED FOR AOG PARTS. ALL PARTS ARRIVED AND WERE INSTALLED SEE L/P 6944435 FOR PARTS INSTALL. THIS CLEARS DISCREPANCY