# SDR IPXA2021092874371

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 28, 2021
- Submitted: October 11, 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: None
- Condition: None
- 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/IPXA2021092874371

## Discrepancy

INSPECTION TYPE:N/A** SUPPLEMENTAL SDR ** FOUND LOWER CARGO AFT 4 LOOP B FAULT MSG ON EICAS - NOT RESETABLE. ITEM DEFERRED PER MEL 26-16-1-2-2-1 REV 24. DMP ACCOMPLISHED. PLACARD INSTALLED. DMI M758012 OPENED.R/R R4223 AFT LL CGO 4 LOOP B RELAY. OPS CHECK GOOD PER SWPM 20-81-22. THIS CLEARS M758012

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