# SDR ASAA2022071239042

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 12, 2022
- Submitted: July 13, 2022
- Operation: Air carrier
- Aircraft: [N468AS](https://openairdocs.org/aircraft/N468AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41735
- Aircraft time: 29,641 hours, 9,414 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Satcom
- Part number: UNKNOWN
- Condition: Faulted
- Location: Unknown
- 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/ASAA2022071239042

## Discrepancy

UNABLE TO CONNECT TO MEDLINK VIA SAT 1 OR SAT 2 FMC SHOWED CONNECTED, SAT 1/2 BLUE LIGHTS ON AFT PANEL WERE ILLUMINATED, BUT NO SIDETONE IN PILOTS HEADSETS COULD BE HEARD AND NO COMMUNICATION COULD BE ESTABLISHED. GROUNDED - YES. CONFIG A/C FOR MEDLINK CALL WITH SATCOM 1 AND 2, DISPATCH VERIFIED CALL, SATCOM TEST NORMAL REF B737-900 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.