# SDR ASAA2019082973527

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 27, 2019
- Submitted: August 29, 2019
- Operation: Air carrier
- Aircraft: [N486AS](https://openairdocs.org/aircraft/N486AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44107
- Aircraft time: 15,766 hours, 5,128 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Transceiver
- Part number: 8220990004
- Part serial: 47047V
- Condition: Failed
- Location: Hf Comms
- Part time: 15,772 hours, 5,131 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019082973527

## Discrepancy

NR 2 HF SHOWING FAIL. GROUNDED - YES. VERIFIED FAULT, LRU FAILED BITE. REMOVED & REPLACED HF-2 TRANSCEIVER REF B737-900 AMM 23-11-21-400-801, INSTALLATION & GROUND VERIFICATION TEST PASSED.

---
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.