# SDR ASAA2016071517397

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 15, 2016
- Submitted: July 18, 2016
- Operation: Air carrier
- Aircraft: [N474AS](https://openairdocs.org/aircraft/N474AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40715
- Aircraft time: 4,162 hours, 1,379 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Satcom
- Condition: Malfunctioned
- 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/ASAA2016071517397

## Discrepancy

DISPATCH AND MED LINK UNABLE TO HEAR OUR SATCOM TRANSMISSIONS ON EITHER SATCOM NR 1 AND  2. BOTH CAPT AND FO TRIED TRANSMITTING MULTIPLE TIMES. WE CAN HEAR THEM BUT THEY CAN'T HEAR US. GROUNDED - YES. ACCOMPLISHED SATCOM COMMUNICATION SYSTEM TEST, REF B737-900 AMM 23-15-00. BOTH CAPT'S & F/O'S TRANSMIT & RECEIVED NORMAL. ALSO COMMUNICATED USING ALL 3 CABIN MEDLINK STATION NORMAL.

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