# SDR UIEA2021090701975

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 11, 2021
- Submitted: September 15, 2021
- Operation: Air carrier
- Aircraft: [N480MC](https://openairdocs.org/aircraft/N480MC), registered now
- Make and model: Boeing 747422
- Aircraft serial: 28812
- Aircraft time: 7,810,558 hours, 9,005 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 20181A
- Part serial: NSN
- Condition: Unserviceable
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2021090701975

## Discrepancy

R4 DOOR EMER LIGHTS INOP (OVHD BILLBOARD)(<P ><SPAN>REMOVED AND REPLACED R4 DOOR EMERGENCY LIGHT BATTERIES PER B747 AMM 33-51-04-G02-001-001. OPS CHECKED GOOD.</SPAN></P> / <P> </P>)

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