# SDR DALA2018102206187

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 21, 2018
- Submitted: October 22, 2018
- Operation: Air carrier
- Aircraft: N961DL
- Make and model: Doug MD-88
- Registry model: [Doug MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (OpenAirDocs)
- Aircraft serial: 49980
- Aircraft time: 74,511 hours, 55,683 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: Failed
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2018102206187

## Discrepancy

DURING SERVICE CHECK, MAINTENANCE FOUND THE LEFT AND RIGHT AFT EMERGENCY EXIT SIGNS NOT ILLUMINATING. TROUBLE SHOOTING PER WDM 33-51-12 AND 33-51-14 ALLOWED DISCOVERY THAT THE EMERGENCY LIGHT BATTERY PACKS B5-105 AND B5-212 HAD FAILED. BOTH BATTERY PACKS WERE REPLACED AND THE OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT IS OK FOR SERVICE. (LP 4586658)

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