# SDR IPXA2022031580143

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 2022
- Submitted: March 16, 2022
- Operation: Air carrier
- Aircraft: [N294UP](https://openairdocs.org/aircraft/N294UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48472
- Aircraft time: 90,131 hours, 16,732 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: None
- Part number: NA
- Part serial: NA
- Condition: None
- Location: Cabin
- Stage of operation: CR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2022031580143

## Discrepancy

INSPECTION TYPE:NAIN CRUISE FLIGHT AT FL 320 THE LEVEL 1 " AVNCS FAN OVRD " ANNUNCIATED.C/W FRM/FIM 21-26-04-00 TO BLK 7 NO FAULTS NOTED AND C/W 21-26-02-00 TO BLK 4 " SYSTEM OK ". MESSAGE EXTINGUISHED ON DESCENT, COULD NOT DUPLICATE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.