# SDR IPXA2020081098806

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2020
- Submitted: August 10, 2020
- Operation: Air carrier
- Aircraft: [N613UP](https://openairdocs.org/aircraft/N613UP), registered now
- Make and model: Boeing 747-8F
- Registry model: [Boeing 747-8F](https://openairdocs.org/model/boeing-747-8f) (OpenAirDocs)
- Aircraft serial: 64259
- Aircraft time: 6,962 hours, 1,000 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Hf Comm
- Condition: Inoperative
- Location: Left
- Stage of operation: CR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2020081098806

## Discrepancy

LEFT HF WILL NOT TRANSMIT CAUSED AIR TURNBACK.A/C UPON ARRIVED BOTH HF SYS FAULT REVIEW, PRESENT LEG FAULT AND FAULT HISTORY NO FAULT FOUND, ONLY UPPER EICAS RADIO TRANSMIT ADVISORY MSG DISPLAYED. T/S PER FIM 23-11-803 AND 804 AND 23-50-00-810-847 RESET OF THE EIU CB, ON CMC BOTH HF SYS TEST PASSED. SEOUL RADIO FQ8.903 CONTACT BOTH HF SYS

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