# SDR ASAA2018041024194

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2018
- Submitted: April 11, 2018
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 45,113 hours, 13,325 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Transceiver
- Part number: 8220990004
- Part serial: 1696G5
- Condition: Failed
- Location: Nr 1 Hf Comms
- Part time: 45,101 hours, 13,322 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018041024194

## Discrepancy

NR 1 HF FAIL INDICATION IN BOTH ACTIVE AND STANDBY WINDOWS.  ACFT GROUNDED.   FAIL DISPLAYED ON RADIO TUNING PANEL NR 1 HF. BITE SHOWS LRU FAILED ON NR 1 HF TRANSCEIVER IAW BITE IAW FIM 23-11/801.  REPLACED THE NR 1 TRANSCEIVER IAW AMM 23-11-21. OPS CHECKED NORMAL.  HF COMMUNICATION TESTED GOOD IAW FIM 23-11/801.

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