# SDR ASAA2026050465904

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2026
- Submitted: May 6, 2026
- Operation: Air carrier
- Aircraft: [N532AS](https://openairdocs.org/aircraft/N532AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36346
- Aircraft time: 55,722 hours, 16,899 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Faulty
- Location: Zone 200
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2026050465904

## Discrepancy

DURING TAKEOFF ROLL EMERGENCY LIGHTS AT R2 DOOR AND DOWNLIGHTS UNDER OVERHEAD BINS AT 28C AND 30C CAME ON AND STAYED ON FOR ABOUT ONE MINUTE. GROUNDED - YES. PER WDM 33-51-14 ALL AFFECTED LIGHTS GO TO THE M1672 EMERGENCY BATTERY POWER SUPPLY. INSP OF P/S SHOWED A BROKEN TEST SWITCH STICKS. REMOVED AND REPLACED M1672 AFT R/H P/S IAW AMM 33-51-06. 1 MIG 51A INST/RMVD INSTALLATION TEST GOOD.

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