Service difficulty report · Battery Pack · Boeing 7378H4

Difficulty date
June 24, 2025
Submitted
June 30, 2025
Operation
Air carrier
Aircraft
N8533S
Make and model
Boeing 7378H4
Aircraft serial
63577
Aircraft time
26,459 hours, 13,470 cycles
Part
Battery Pack
Condition
Failed
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

PASSENGER CABIN EMERGENCY EXIT LIGHT FORWARD BATTERY PACKS M1675 STATION 317 AND M1676 STATION 500C ARE FAILING TO STAY CHARGED.<[01] REMOVED AND INSTALLED NEW PASSENGER CABIN EMERGENCY EXIT LIGHT FORWARD BATTERY PACKS M1675 STATION 317 AND M1676 STATION 500C <BR><BR>AMM 33-51-06-960-805<BR>AMM 21-23-03-400-802<BR>AMM 21-23-03-000-802<BR>AMM 25-21-71-400-817<BR>AMM 25-21-71-000-817<BR><BR>OPS CHECK GOOD;[02] STEP 1 ENTER IN ERROR;[03] REMOVED AND INSTALLED NEW PASSENGER CABIN EMERGENCY EXIT LIGHT FORWARD BATTERY PACKS M1675 STATION 317 AND M1676 STATION 500C AMM 33-51-06-960-805, AMM 21-23-03-400-802, AMM 21-23-03-000-802, AMM 25-21-71-400-817, AMM 25-21-71-000-817. OPS CHECK GOOD.

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