# SDR UALA2011052302516

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2011
- Submitted: June 15, 2011
- Operation: Air carrier
- Aircraft: [N799UA](https://openairdocs.org/aircraft/N799UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26926
- Aircraft time: 57,909 hours, 8,416 cycles
- Engine: Pwa PW40903
- System (JASC): [2340 · Interphone/Passenger Announcement (PA) System](https://openairdocs.org/jasc/2340)
- Part: Amu
- Part number: 5700110
- Part serial: 12
- Condition: Inoperative
- Location: Cabin
- 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/UALA2011052302516

## Discrepancy

CABIN INTERPHONE INOP TO COCKPIT.  SAMC TEXT:  SELECTED CI TO ALT, WORKED FOR A COUPLE MINUTES THEN FAILED.  COCKPIT GETS BUSY SIGNAL.  REPLACED PA-CABIN INTERPHONE CONTROLLER & AMU PER MM.  RESET O2 MASKS & MINITELS IN FLT DECK.  SYSTEM RESTORED TO NORMAL.

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