# SDR QXEA0000013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 11, 2000
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N492US
- Make and model: Fokker F.28 MK4000
- Registry model: [Fokker F.28 MK4000](https://openairdocs.org/model/fokker-f-28-mk4000) (OpenAirDocs)
- Aircraft serial: 11159
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: O2 Mask
- Condition: Failed Deploy
- Location: Cabin
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QXEA0000013

## Discrepancy

BOI - DURING CLIMB-OUT AND AFTER TURNING ON AIRFOIL ANTI-ICE, CREW NOTICED AIR FOIL VALVES CLOSED AT 10000 FEET, CREW NOTED PRESSURE DIFFERENTIAL BETWEEN 2 AND 3 PSI.  CREW DECIDED TO RETURN TO BOISE..  ALL PASSENGER OXYGEN MASKED AUTOMATICALLY DEPLOYED.  ONE FLIGHT ATTENDENT OXYGEN MASK FAILED TO DEPLOY IN THE AFT STATION.  REPOSITIONED SPRING ON OXYGEN MASK DOOR.  OPERATIONAL CHECK GOOD.  AIRCRAFT RETURNED TO SERVICE.

---
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.