# SDR ASAA2023092545324

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 2023
- Submitted: September 27, 2023
- Operation: Air carrier
- Aircraft: [N481AS](https://openairdocs.org/aircraft/N481AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44106
- Aircraft time: 30,372 hours, 9,499 cycles
- System (JASC): [2397 · Communications System Wiring](https://openairdocs.org/jasc/2397)
- Part: Coupler
- Part number: 8220987004
- Part serial: 199385
- Condition: Inoperative
- Location: Hf Antenna
- Part time: 30,365 hours, 9,496 cycles
- Stage of operation: NR
- 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/ASAA2023092545324

## Discrepancy

UNABLE TO TRANSMIT ON #1 HF RADIO. GROUNDED - YES. TRIED SERVICEABLE #1 HF TRANSCEIVER- NO HELP. RE-INSTALLED ORIGINAL HF TRANSCEIVER REF. AMM 23-11-21. REPLACED #1 HF ANTENNA COUPLER- OPS CHECKS O.K. REF AMM 23-11-61. REF LOG PAGE 60911932 FOR COUPLER ACCESS PNL SEALENT DEFERRAL. SEAMC PHIL NOTIFIED.

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