# SDR IPXA2021100674649

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 5, 2021
- Submitted: October 11, 2021
- Operation: Air carrier
- Aircraft: [N287UP](https://openairdocs.org/aircraft/N287UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48539
- Aircraft time: 92,909 hours, 17,433 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: None
- Part number: 4059027903
- Part serial: 91040251
- Condition: None
- Location: Cabin
- Stage of operation: TX
- How discovered: 9
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2021100674649

## Discrepancy

INSPECTION TYPE:N/A**SUPPLEMENTAL SDR** EMERG LIGHT BAT 3 LO LEVEL ONE ALERT CAME ON DURING EMERGENCY LIGHT TEST DURING PRE FLIGHT. DEFERRED PER MEL 33-50-2 AND DMP 33-50-2REMOVED AND INSTALLED NEW MSC UNIT IAW AMM 31-42-01. THIS CLEARS M758798

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