# SDR B62R20110714001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 14, 2011
- Submitted: September 14, 2011
- Operation: General aviation
- Aircraft: HZHMS
- Make and model: Airbus A340212
- Aircraft serial: 204
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Control Panel
- Part number: 817535128140001
- Part serial: 0001
- Condition: Malfunctioned
- Location: Medical O2
- 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/B62R20110714001

## Discrepancy

MEDICAL OXYGEN CYLINDER LEAKED OUT AND DEPLETED.   PROBLEM HAS BEEN ISOLATED TO CONTROL CIRCUITRY FOR THE OXYGEN PULSE LATCHING VALVE.   MFR REPORTED THAT A CONTINUOUS ON POWER SIGNAL WOULD CAUSE THE VALVE TO CHATTER, RELEASING OXYGEN SLOWLY FROM THE CYLINDER UPSTREAM OF THE VALVE.

---
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.