# SDR UALA2010012900366

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2010
- Submitted: January 29, 2010
- Operation: Air carrier
- Aircraft: [N777UA](https://openairdocs.org/aircraft/N777UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26916
- Aircraft time: 59,454 hours, 11,109 cycles
- Engine: Pwa PW4077
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen System
- Part number: MXP4023
- Condition: Leaking
- Location: Crew
- 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/UALA2010012900366

## Discrepancy

CREW O2 FAULTY.  THE CREW O2 WAS BELOW 1000PSI AT IAD SO IT WAS SERVICED TO 1625PSI.  WE HAVE FLOWN A LITTLE OVER 6 HRS AND O2 SHOWS 1340PSI.  IS THAT NORMAL OR SHOULD WE SUSPECT A LEAK.  FOUND O2 LEAK AT BOTH IN-AND-OUT PORTS OF PX REGULATOR. REPLACED PACKINGS, PNR BACP11K5 A. ACP'D LEAK CHKS. SATIS. NO FURTHER LEAKS FOUND. SYS O2 PX NOW 1250 PSI.

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