# SDR IPXA2021031666907

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2021
- Submitted: March 19, 2021
- Operation: Air carrier
- Aircraft: N271UP
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48572
- Aircraft time: 66,331 hours, 18,708 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: No Test
- Location: Emergncy Lights
- 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/IPXA2021031666907

## Discrepancy

WHEN PREFLIGHT TESTING THE EMERGENCY LIGHTS EMERG LT BAT 1 LO ILLUMINATED. DEFERRED PER MEL 33 50 4 EMERGENCY LT BAT 1 LO DMP C/W M738710R/R'D EMERGENCY LIGHT BATTERY & OPS CK REF MM 33-50-00. OPS CHK GOOD.  DMP REVERSED 33-50-1.  M738710 CLEARED.  EFF SOURCE 33-51-01-05-015.

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