# SDR ASAA2025120662879

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 6, 2025
- Submitted: December 10, 2025
- Operation: Air carrier
- Aircraft: [N559AS](https://openairdocs.org/aircraft/N559AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35178
- Aircraft time: 65,436 hours, 19,886 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Inoperative
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2025120662879

## Discrepancy

WHILE PERFORMING T/C 78233008 EMERGENCY LIGHT-OPS CHECK FOUND LH & RH EXIT INDICATOR SIGNS INOP. GROUNDED - YES. DURING WIRING T/S, FOUND BOTH SIDE O/W DOOR TRIM HTR WIRE CONNECTED WITH BOTH SIDE FWD O/W EXIT IND LT(D12068-D12704, D12072-D12706, D12064-D12680, D12066-D12682).SO, CORRECT THE WIRING AND REPLACED BOTH SIDE EMER PWR SUPPLY THEN OPS TEST NML PER AMM TASK 33-51-06-960-806.

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