# SDR UALA2013052803673

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 27, 2013
- Submitted: July 12, 2013
- Operation: Air carrier
- Aircraft: [N220UA](https://openairdocs.org/aircraft/N220UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30223
- Aircraft time: 51,007 hours, 6,222 cycles
- Engine: Pwa PW4090
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Controller
- Part number: 11511007
- Part serial: 6
- Condition: Failed
- Location: Rt Bleed
- Stage of operation: NR
- 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/UALA2013052803673

## Discrepancy

RT ENGINE BLEED FAN AIR MODULATING VALVE FAILED OPEN OR CLOSED, OR RT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILED.    REPLACED THE RT ASCPC IAW MM.  REACTIVATED FAMV TEST NORMAL.  NO FAULTS.

---
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.