# SDR ASAA0955045

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 5, 2009
- Submitted: April 9, 2009
- Operation: Air carrier
- Aircraft: [N585AS](https://openairdocs.org/aircraft/N585AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35683
- Aircraft time: 6,209 hours, 1,812 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Coupler
- Part number: 8220987004
- Part serial: 153825
- Condition: Defective
- Location: Hf Comm
- Part time: 10,553 hours, 3,071 cycles
- Stage of operation: UK
- 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/ASAA0955045

## Discrepancy

NR 1 HF TRANSMISSIONS CUTTING OUT DURING POSITION REPORTS.  ONLY OCCASIONALLY AND INCONSISTENTLY.  PERFORMED NR 1 HF TRANSCEIVER BITE TEST.  FOUND KEY INTERLOCK LIGHT NOT COMING ON ALL THE TIME.  REMOVED AND REPLACED NR 1 ANTENNA COUPLER REF 23 11 61 000 801 AND 23 11 61 400 801.  OPS CHECKED PER SAME STEP F.  SYS CHECKS NORMAL.  BITE REF 23 11 00 810 801.

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