# SDR UIEA2021090601959

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2021
- Submitted: September 9, 2021
- Operation: Air carrier
- Aircraft: [N473MC](https://openairdocs.org/aircraft/N473MC), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 27174
- System (JASC): [2311 · UHF Communications System](https://openairdocs.org/jasc/2311)
- Part: Transceiver
- Part number: 6225272120
- Part serial: 5757
- Condition: Faulted
- Location: Rt Hf System
- 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/UIEA2021090601959

## Discrepancy

AIR TURNBACK DUE TO INABILITY TO ESTABLISH HF CONTACT.(<P> REMOVED AND REPLACED R/H HF TRANSCEIVER. OPS CK GOOD IAW AMM 23-11-05.</P>)

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