# SDR ASAA2019040868907

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 6, 2019
- Submitted: April 8, 2019
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 45,963 hours, 13,645 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Satcom
- Condition: Malfunctioned
- Location: Nr 1 & 2
- 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/ASAA2019040868907

## Discrepancy

SATCOM 1&2 UNABLE TO TRANSMIT BUT COULD RECEIVE INCOMING VOICE TRANSMISSIONS. CPDLC WORKED. ACARS OVER SATCOM WORKED. GROUNDED - YES. PERFORMED SATCOM #1 & #2 VOICE TEST, INCOMING CALL & OUTGOING CALL TEST NORMAL PER B737-800 AMM 23-15-00-730-801.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.