# SDR CALA2025112511473

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 22, 2025
- Submitted: November 25, 2025
- Operation: Air carrier
- Aircraft: [N17296](https://openairdocs.org/aircraft/N17296), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 67556
- Aircraft time: 10,202 hours, 3,516 cycles
- System (JASC): [2397 · Communications System Wiring](https://openairdocs.org/jasc/2397)
- Part: Coupler
- Part number: 9640453011
- Part serial: 06982
- Condition: Faulty
- Location: Zone 100
- Part time: 10,189 hours, 3,511 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025112511473

## Discrepancy

HF1 TUNES GOOD ON THE GROUND. WOULD NOT TUNE AIRBORNE REMOVED AND REPLACED HF TRANSCEIVER. OPS TEST FAILED. HF1 DOES NOT TUNNING-IN FOR HF 1 RADIO CALL OUT. REF AMM 23-11-21/ 401 HF1 TRANSCIEVER HAS BEEN REPLACED, NO JOY. TUNING BEEP IS CONTINOUS SUGGESTING HF1 CANT TUNE PROPERLY. RECCOMMED REPLACING 1 HF COUPLER. PART HAS BEEN ORDERED TO B29. REMOVED AND REPLACED #1 HF COUPLER REF AMM 23 -11-61 UPTO HF ANTENNA COUPLER INSTALLATION TEST.

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