# SDR ASAA2019112623425

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 22, 2019
- Submitted: November 27, 2019
- Operation: Air carrier
- Aircraft: [N564AS](https://openairdocs.org/aircraft/N564AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35103
- Aircraft time: 49,904 hours, 15,047 cycles
- System (JASC): [2397 · Communications System Wiring](https://openairdocs.org/jasc/2397)
- Part: Coupler
- Part number: 8220987004
- Part serial: 155985
- Condition: Failed
- Location: Nr 1 Hf Antenna
- Part time: 46,696 hours, 13,824 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019112623425

## Discrepancy

HF1 XMIT WAS NOT RECEIVED BY ATC. RECEIVED TRANSMISSIONS FROM ATC ON HF2. GROUNDED - YES. REMOVED AND REPLACED #1 HF ANTENNA COUPLER IAW B737-800 AMM 23-11-61/401. INSTALLATION TESTED NORMAL. VERIFIED #1 HF TRANSMIT AND RECEIVED NORMAL. REMOVED MEL 23-11A.

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