# SDR AALA202101199003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 18, 2021
- Submitted: January 19, 2021
- Operation: Air carrier
- Aircraft: [N737US](https://openairdocs.org/aircraft/N737US), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 1245
- Aircraft time: 54,197 hours, 33,183 cycles
- System (JASC): [2312 · VHF Communications System](https://openairdocs.org/jasc/2312)
- Part: Amu
- Part number: AMU2790CB06
- Part serial: 1834
- Condition: Interference
- Location: Zone 200
- Part time: 54,508 hours, 25,282 cycles
- Stage of operation: AP
- 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/AALA202101199003

## Discrepancy

AIRCRAFT WAS GROUNDED.  AT LOW ALTITUDE ON APPROACH AND ON DEPARTURE AFTER TAKE-OFF THERE IS A LOUD ACARS DATA STREAM NOISE BLEED OVER ONTO VHF 1 & 2 COM RADIOS.  IT INTERFERES WITH REQUIRED RADIO TRANSMISSION RECEPTION POSSIBLE CELL PHONE NOISE, BUT NOT TYPICAL WITH OTHER AIRCRAFT.  REMOVED AND REPLACED AUDIO MANAGEMENT UNIT, IAW AMM 23-51-00.

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