# SDR ASAA2023080244381

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 2, 2023
- Submitted: August 3, 2023
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 54,253 hours, 15,991 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Malfunctioned
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023080244381

## Discrepancy

WORKING TC 78233001, FOUND EMERGENCY LIGHTING BATTERY PACKS M1673 AND M1671 TO FAIL CAPACITY CHECKS. GROUNDED - YES. EMERGENCY LIGHTING BATTERY PACKS M1673 & M1671 REMOVED AND REPLACED PER AMM 33-51-06-960-805. TWO MIG-51A TAGS INSTALLED AND REMOVED. OPS CHECKS GOOD.

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