# SDR CALA2026020513594

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2026
- Submitted: February 5, 2026
- Operation: Air carrier
- Aircraft: [N17529](https://openairdocs.org/aircraft/N17529), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 64503
- Aircraft time: 17,516 hours, 5,782 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: ADD71701100
- Condition: No Test
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026020513594

## Discrepancy

EMERGENCY LIGHTS OPS CHECK,  1ST CLASS EMERGENCY LIGHTS & RIGHT EXTERIOR DOOR LIGHTS DO NOT COME ON,  FOUND MULTIPLE BURNED WIRES IN WIRE BUNDLE M02816, W4142, D14812,  FWD BATTERY PACK  BURNED WIRES GOES TO PINS 5, 6 AND 7, INSTALLED NEW M2816 POWER SUPPLY AND BATTERY DUE TO CASE GROUND SHORT, IAW AMM TASK 33-51-06-960-803, OPS CHKD GOOD. RAN NEW WIRES FOR CASE GROUND (W4142-0707-20 & W4142-0706-20) IAW SWPM 20-10-11 OPS. CHKD GOOD, NO HEAT, WIRES HAVE NORMAL RESISTANCE & ARE NOT CARRYING VOLTAGES.

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