# SDR DALA2018092405716

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2018
- Submitted: September 24, 2018
- Operation: Air carrier
- Aircraft: N916DE
- Make and model: Doug MD-88
- Registry model: [Doug MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (OpenAirDocs)
- Aircraft serial: 53421
- Aircraft time: 62,704 hours, 48,630 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Discharged
- Location: Cockpit
- 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/DALA2018092405716

## Discrepancy

DURING SERVICE CHECK, MAINTENANCE FOUND THE COCKPIT EMERGENCY LIGHT TO BE INOPERATIVE. TROUBLESHOOTING LEAD TO A DEFECTIVE BATTERY IN THE POWER PACK REF AMM 33-53. BOTH BAD CELLS IN THE BATTERY PACK WERE REPLACED. OPERATIONAL CHECK WAS GOOD.

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