# SDR ASAA2023041042785

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2023
- Submitted: April 11, 2023
- Operation: Air carrier
- Aircraft: [N468AS](https://openairdocs.org/aircraft/N468AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41735
- Aircraft time: 32,499 hours, 10,275 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023041042785

## Discrepancy

HF #1 FAIL MESSAGE ON BOTH ACP'S. GROUNDED - YES. VERIFIED FAULT, ACCOMP. BITE TEST OF #1 HF TRANSCEIVER NO FAULTS BITE TEST PASS. FAIL MESSAGE NO LONGER SHOWS. REF. B737-900 AMM 23-11-00-710-801 ACCOMP. TEST WITH SFO COMM TEST PASSES REF. AMM 23-11-00-730-001.

---
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.