SDR CALA2026080918400

Service difficulty report · Battery Pack · Boeing 7879

Difficulty date: August 7, 2026
Submitted: August 10, 2026
Operation: Air carrier
Aircraft: N29978
Make and model: Boeing 7879
Aircraft serial: 66137
Aircraft time: 30,357 hours, 2,990 cycles
System (JASC): 3350 · Emergency Lighting
Part: Battery Pack
Part number: AD100260201
Part serial: 1262
Condition: Faulted
Location: Zone 200
Part time: 8,694 hours, 816 cycles
Stage of operation: IN
How discovered: V
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

GENERAL ILLUMINATION LIGHT OPS TEST, FOUND INOP ABOVE SEAT 22DEF IAW HAECO NON-ROUTINE 9461558, NOTE THE WIFI EMER LIGHTING WELS BATTERY INSTALLED. REPLACED THE WCU CLASS 13.1 (M3351081) & WBU AT ZONE 2 MID BIN AREA AND SOFTWARE INSTALLATION & INSTALLATION TEST, FOUND NORMAL, IAW AMM 33-51-07-01B-520A/720A-A REV.210.

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