# SDR IPXA2021092874370

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 28, 2021
- Submitted: September 29, 2021
- Operation: Air carrier
- Aircraft: [N578UP](https://openairdocs.org/aircraft/N578UP), registered now
- Make and model: Boeing 747-44AF
- Registry model: [Boeing 747-44AF](https://openairdocs.org/model/boeing-747-44af) (OpenAirDocs)
- Aircraft serial: 27154
- Aircraft time: 113,027 hours, 18,852 cycles
- System (JASC): [2600 · Fire Protection System](https://openairdocs.org/jasc/2600)
- Part: Smoke Detector
- Part number: 285T0035202
- Part serial: D05495
- Condition: Faulty
- Location: Fuselage
- Stage of operation: IN
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2021092874370

## Discrepancy

INSPECTION TYPE:N/ADURING PDC FOUND MULTIPLE CARGO SMOKE DETECTION FAULTS.R&R MAWEA POWER SUPPLY YMXA020 PER AMM 31-51-01 PB 401 REV 102.00. TEST OK. P/N OFF-ON: 285T0035-202, S/N OFF: D05495, S/N ON: D04587. EFF REF IPC: 31-51-01-01 ITEM 005L.

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