# SDR IPXA2020072758289

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2020
- Submitted: July 27, 2020
- Operation: Air carrier
- Aircraft: [N274UP](https://openairdocs.org/aircraft/N274UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48575
- Aircraft time: 72,303 hours, 14,361 cycles
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Relay
- Condition: Failed
- Location: Cargo Flow
- Stage of operation: CR
- 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/IPXA2020072758289

## Discrepancy

DURING CRUISE, FL 310, ONE HOUR LEFT IN FLIGHT,  HAD A LEVEL 1 CARGO FLOW FWD DISAGREE.   NO OTHER INDICATIONS FOUND. TROUBLESHOT IAW FIM 21-27-00-101, STEP 4.   R & R RELAY R2-78 IAW WDM 21-43-01 AND AMM 20-30-10. OPS CHECKED GOOD.

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