# SDR UALA2012011100236

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 10, 2012
- Submitted: January 11, 2012
- Operation: Air carrier
- Aircraft: [N105UA](https://openairdocs.org/aircraft/N105UA), registered now
- Make and model: Boeing 747451
- Aircraft serial: 26473
- Aircraft time: 72,141 hours, 8,564 cycles
- Engine: Pwa PW4056
- System (JASC): [2340 · Interphone/Passenger Announcement (PA) System](https://openairdocs.org/jasc/2340)
- Part: Controller
- Part number: 1167006144
- Part serial: 204
- Condition: Faulty
- Location: Interphone
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012011100236

## Discrepancy

UNABLE TO MAKE CALLS OUT FROM AFT CREW REST ON THE INTERPHONE, CAN RECEIVE CALLS THOUGH.  REPLACED LAC#4 PER MM, SYSTEM NORMAL.

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