# SDR CALA2013101892171

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 16, 2013
- Submitted: October 22, 2013
- Operation: Air carrier
- Aircraft: [N222UA](https://openairdocs.org/aircraft/N222UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30553
- Aircraft time: 52,569 hours, 6,313 cycles
- Engine: Pwa PW40903
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013101892171

## Discrepancy

CABIN ALTITUDE AUTO LOSS OF INPUT FROM, OR FAILURE OF BOTH ASCPC'S, OR LOSS OF INPUT OR FAILURE OF BOTH OFV'S, OR A COMBINATION OF THE ABOVE THAT RESULTS IN LOSS OF COMPLETE AUTOMATIC CONTROL, OR MANUAL MODE SELECTED FOR BOTH OFV'S.   CAUTION IAW PTT SEQ 5692013 OUTFLOW VLV FWD LT IAW AMM 21-31-03, OPERATIONS CHECKED GOOD, NO FAULTS NOTED.

---
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.