Service difficulty report · Battery Pack · Boeing 7377BD

Difficulty date
March 26, 2023
Submitted
March 30, 2023
Operation
Air carrier
Aircraft
N556WN
Make and model
Boeing 7377BD
Aircraft serial
33936
Aircraft time
37,398 hours, 21,958 cycles
Part
Battery Pack
Condition
Inoperative
Location
Zn 200 Fus Top
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

EMERGENCY EXIT LIGHTS ASSOCIATED WITH BATTERY PACK M2335 ARE INOPERATIVE. FOUND CONNECTOR TO BATTERY CHARGER FOR M2335 DISCONNECTED. RECONNECTED; AND PERFORMED TEST OF EMERGENCY EXIT LIGHTS ASSOCIATED WITH BATTERY PACK M2335. FOUND TWO OF THE FOUR ASSOCIATED LIGHTS STILL NOT OPERATING: AISLE LIGHTS AT BS 520 RBL30; AND BS 560 LBL30. RELAMPED IAW AMM 33-51-03-960-801 WITH LIGHTS STILL INOP. SUSPECTED BAD LIGHT ASSEMBLIES. UPON FURTHER INVESTIGATION, FOUND AISLE LIGHT ASSEMBLIES AT BS 520 RBL 30 AND BS 500C LBL 30 DAMAGED. REMOVED AND REPLACED AISLE LIGHT ASSEMBLIES, PERFORMED GOOD INSTALLATION TEST. ALL WORK PERFORMED IAW AMM 33-51-03-960-802.

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