# SDR FDEA201711023129

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 2, 2017
- Submitted: November 3, 2017
- Operation: Air carrier
- Aircraft: [N922FD](https://openairdocs.org/aircraft/N922FD), registered now
- Make and model: Boeing 757-23A
- Registry model: [Boeing 757-23A](https://openairdocs.org/model/boeing-757-23a) (OpenAirDocs)
- Aircraft serial: 24293
- Aircraft time: 70,643 hours, 25,391 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Bottle
- Part number: 80130723
- Part serial: ST74905
- Condition: Failed
- Location: Crew Oxygen
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201711023129

## Discrepancy

DURING REMOVAL PROCEDURE FOR FWD CREW OXYGEN BOTTLE, THE AFT CREW  OXYGEN BOTTLE SHUT OFF VALVE WAS FOUND TO BE FAULTY AND WOULD NOT SHUT OFF CREW OXYGEN FLOW TO THE COCKPIT.  BLED OFF ALL OF THE AFT OXYGEN CYLINDER CONTENTS.    REMOVED AND REPLACED AFT OXYGEN BOTTLE IAW AMM 35-11-32

---
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.