# SDR CALA2013121293620

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 11, 2013
- Submitted: December 13, 2013
- Operation: Air carrier
- Aircraft: [N792UA](https://openairdocs.org/aircraft/N792UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26934
- Aircraft time: 73,335 hours, 10,306 cycles
- Engine: Pwa PW4090
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Shutoff Valve
- Condition: Faulty
- Location: Nr 1 Nacelle
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013121293620

## Discrepancy

NACELLE VENT VLV LT ENG 1 NACELLE ZONE VENT VLV NOT IN COMMANDED POSITION.  REPLACED NR 1 ENG NACELLE ZONE VENT SHUT OFF VLV IAW AMM 75-23-02.  ENG RUN SHOWS VLV OPERATIONS CHECKED GOOD.  PN 6469017,  SN OFF 0027, SN ON 0141 & PN 5910514-104.

---
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.