# SDR ASAA2017122422984

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 24, 2017
- Submitted: December 26, 2017
- Operation: Air carrier
- Aircraft: [N440AS](https://openairdocs.org/aircraft/N440AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41705
- Aircraft time: 16,600 hours, 5,507 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Satcom
- Condition: Malfunctioned
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017122422984

## Discrepancy

SATCOM VOICE CALLS INOPERATIVE. UNABLE TO TALK OUT ON ACTIVE SATCOM CHANNEL WHEN CALL IS CONNECTED. TRIED BOTH SATCOM 1/2 CHANNELS TO MEDLINK AS WELL AS DISPATCH, COULD HEAR THE CALLED PARTY FINE BUT PARTY COULD NOT HEAR TRANSMISSIONS. ACFT GROUNDED.  ESTABLISHED CLEAR 2 WAY VOICE COMMUNICATIONS ON SATCOM 1 & 2.  GROUND VERIFICATION SUCCESSFUL IAW AMM 23-15-00/501.

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