# SDR CALA2026062517350

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2026
- Submitted: June 25, 2026
- Operation: Air carrier
- Aircraft: [N27511](https://openairdocs.org/aircraft/N27511), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 64493
- Aircraft time: 18,723 hours, 6,212 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Reu
- Part number: 534011
- Part serial: 6982
- Condition: Faulted
- Location: Zone 200
- Stage of operation: CR
- 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/CALA2026062517350

## Discrepancy

BOTH HF INOP LOCKED LP FOR POSITIVE MX ACTION. REMOVED &REPLACED REMOTE ELECTRONICS UNIT REF AMM TASK 23-51-01-400-801. ACCOMPLISHED REU OPS CHECK REF AMM 23-51-01 AND HF 1&2 OPS CHECKS IAW AMM 23-11-00 OPS CHECKS GOOD VERIFIED WAS ABLE TO RECEIVE AND TRANSMIT AND TUNE ON BOTH HF 1&2 .

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.