SDR ASAA2022021037395

Service difficulty report · Battery Pack · Boeing 737900ER

Difficulty date: February 10, 2022
Submitted: February 12, 2022
Operation: Air carrier
Aircraft: N407AS
Make and model: Boeing 737900ER
Aircraft serial: 41731
Aircraft time: 34,922 hours, 10,960 cycles
System (JASC): 3350 · Emergency Lighting
Part: Battery Pack
Part number: ADD71701100
Condition: Failed
Location: Main Cabin
Stage of operation: IN
How discovered: C
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

WHILE ACCOMPLISHING T/C 78233001, FOUND EMERGENCY LIGHT BATTERY PACKS FAIL CAPACITANCE: M1675, M2335, M1671. GROUNDED - YES. T/C 78233001 COMPLETE, REMOVED AND REPLACED BATTERY PACKS M1675, M2335, AND M1671 REF B737-800 AMM 33-51-06-960-805. ALL OPS TESTS PASS.

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