# SDR ASAA2026060766516

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 2026
- Submitted: June 9, 2026
- Operation: Air carrier
- Aircraft: [N564AS](https://openairdocs.org/aircraft/N564AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35103
- Aircraft time: 70,910 hours, 21,552 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71701100
- 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/ASAA2026060766516

## Discrepancy

TWO EXTERIOR EMERGENCY LIGHT WOULD NOT WORK PROPERLY AT LT OVERWING EXIT AFT LIGHT AND LT AFT FUSELAGE LIGHT AND RIGHT AFT FUSELAGE LIGHT. SRXR430X. GROUNDED - YES.  AFTER T/S FOUND BATTERY PACK M1670 AND M1671 BAD IAW WDM 33-51-13 AND 33-51-14. REMOVED AND REPLACED BATTERY PACK M1670 AND 1671 IAW AMM 33-51-06-960-805.  PERFORMED OPS CHECK EMERGENCY LIGHT IAW AMM 33-51-00-710-801 TEST GOOD.

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