SDR ASAA2025052858797

Service difficulty report · Battery Pack · Boeing 737990ER

Difficulty date: May 28, 2025
Submitted: June 18, 2025
Operation: Air carrier
Aircraft: N494AS
Make and model: Boeing 737990ER
Aircraft serial: 41729
Aircraft time: 34,697 hours, 10,511 cycles
System (JASC): 3350 · Emergency Lighting
Part: Battery Pack
Condition: Inoperative
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

AISLE AREA EMERGENCY LIGHTS AT SEATS ROWS 17, 19, 21, 23, AND L/H AND R/H AFT OVERWING LIGHTS FAILED OPS. GROUNDED - YES. REPLACED BATTERY PACKS EMERGENCY LIGHTS ON POWER SUPPLY M1670, M1671, M1694, OPS CHECK GOOD IAW B737-900 AMM 12-23-03-000-801, 21-23-03-400-801, 33-51-06-960-805. (S/N 411302)