# SDR IPXA2022120288630

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 30, 2022
- Submitted: December 2, 2022
- Operation: Air carrier
- Aircraft: [N449UP](https://openairdocs.org/aircraft/N449UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 27738
- Aircraft time: 28,633 hours, 18,908 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Comms Unit
- Condition: Inoperative
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2022120288630

## Discrepancy

INSPECTION TYPE:N/A**ATB**BOTH RADIOS TREMENDOUS SQUEAL BOTH AUDIO PANELS SWITCHED TO ALT FOR REMAINING OF FLT SQUEAL STARTED AT APPLICATION OF T/O POWERR/R OBSERVERS POSITION AUDIO SELECT PANEL PER AMM 23-51-01-404-014. NO FAULTS NOTED. THIS CLEARS M796611

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