# SDR ASAA2018010823157

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 8, 2018
- Submitted: January 17, 2018
- Operation: Air carrier
- Aircraft: [N586AS](https://openairdocs.org/aircraft/N586AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35189
- Aircraft time: 39,094 hours, 11,918 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Coupler
- Part number: 8220987004
- Part serial: 161044
- Condition: Faulted
- Location: Nr 1 Hf Comms
- Part time: 9,955 hours, 3,004 cycles
- 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/ASAA2018010823157

## Discrepancy

NR 1 HF WILL NOT TRANSMIT.  ACFT GROUNDED.  VERIFIED NR 1 HF DOES NOT TRANSMIT.   REMOVED AND REPLACED THE NR 1 HF TRANSCEIVER IAW AMM 23-11-21, AND  NR 1 HF COUPLER IAW AMM 23-11-61, GROUND VERIFICATION TEST PASSED.  CAPTAIN'S & FIRST OFFICER'S AUDIO CONTROL PANEL OPS NORMAL IAW AMM 23-51-02.

---
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.