# SDR SWAA2023040723833

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 5, 2023
- Submitted: April 7, 2023
- Operation: Air carrier
- Aircraft: [N904WN](https://openairdocs.org/aircraft/N904WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36616
- Aircraft time: 49,965 hours, 29,987 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Light
- Condition: Inoperative
- Location: Zn 200 Fus Top
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2023040723833

## Discrepancy

EMERGENCY LIGHTS INOP AT L1 LINER EXIT; L1 LOWER EXIT AND R1 LINER EXIT<[01] FOUND EMERGENCY LIGHTS WERE OPERATING WHEN SWITCH WAS IN THE ARMED POSITION AS WELL. REPLACED EMERGENCY LIGHT SWITCH PER WDM 33-51-11 & SWPM 20-83-11. SWITCH OPERATES NORMAL. FOUND FUSES BAD ON FWD LH EMERGENCY POWER SUPPLY (M1675). FOUND L1 LOWER WALL EXIT LIGHT ASSEMBLY SHORTED PER WDM 33-51-12. R&R L1 LOWER WALL EXIT LIGHT PER AMM 33-51-01. FOUND BAD LAMPS ON R1 LINER EXIT LIGHT; RELAMPED PER AMM 33-51-01. REPLACED LH AND RH EMERGENCY POWER SUPPLIES AND BATTERY PACKS PER AMM 33-51-06. OPS CHECKED EMERGENCY LIGHTS PER AMM 33-51-00. EMERGENCY LIGHTS GOOD.

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