# SDR UIEA2026100100937

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2026
- Submitted: October 5, 2026
- Operation: Air carrier
- Aircraft: [N473MC](https://openairdocs.org/aircraft/N473MC), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 27174
- Aircraft time: 124,490 hours, 22,486 cycles
- System (JASC): [2620 · Extinguishing System](https://openairdocs.org/jasc/2620)
- Part: Extinguisher
- Part number: 3490000640
- Part serial: 02879N1
- Condition: Low Pressure
- Location: Zone 100
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2026100100937

## Discrepancy

BTL LOW CARGO A & B STATUS MESSAGE(<P>REMOVED AND REPLACED LOWER CARGO FIRE EXTINGUISHER BOTTLE A IAW AMM 26-23-01/401 & IPC 26-20-01-03. OPS CHECK AND LEAK CHECK GOOD. R & R LOWER CARGO FIRE EXT BOTTLE B, C, & D IAW AMM 26-23-01/401 AND IPC 26-24-01-05. REPLACED AFT CARGO AFOLTS FIRE CARD IAW AMM 26-10-01/401 AND IPC 26-10-01-10, OPS CHECK GOOD. REPLACED LWR AFT ZONE 1 LOOP FIRE CARD, AFT ZONE 1 LOOP B, LWR AFT ZONE 1 LOOP, AND REPLACED LWR CARGO FIRE EXTINGUISHER FILTER/DRYER IAW AMM 26-23-04/401 AND AIPC 26-23-00-06. ALL OPS CHECK GOOD.</P>)

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