# SDR UALA2011101105521

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 10, 2011
- Submitted: October 13, 2011
- Operation: Air carrier
- Aircraft: N178UA
- Make and model: Boeing 747422
- Aircraft serial: 24385
- Aircraft time: 88,101 hours, 10,690 cycles
- Engine: Pwa PW4056
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Stowage Box
- Condition: Defective
- Location: Cockpit
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011101105521

## Discrepancy

UNABLE TO TRANSMIT FROM CAPTS HEADSET.  HAND MIC IS OK.  REPLACED O2 BOX.  OPERATION RETURNED TO NORMAL.

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