# SDR CALA2015052700455

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 27, 2015
- Submitted: May 27, 2015
- Operation: Air carrier
- Aircraft: [N54711](https://openairdocs.org/aircraft/N54711), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28782
- Aircraft time: 55,617 hours, 18,895 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Bottle
- Part number: 80130700
- Part serial: 6724
- Condition: Unserviceable
- Location: Cockpit
- Part time: 29,361 hours, 10,627 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2015052700455

## Discrepancy

WHILE IN CRUISE AT 38,000, CREW O2 PRESS DROPPED TO 0 PSI.  BEFORE DEPARTURE GAUGE READ 510 PSI AT 21C.  R & R CREW OXYGEN CYLINDER IAW AMM 12-15-21-600-801-0011.

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