# SDR AALA202107073342

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2021
- Submitted: July 7, 2021
- Operation: Air carrier
- Aircraft: [N989AU](https://openairdocs.org/aircraft/N989AU), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7307
- Aircraft time: 14,854 hours, 5,711 cycles
- Engine: Iae V2533A5
- System (JASC): [7532 · Compressor Bleed Valve](https://openairdocs.org/jasc/7532)
- Part: Transducer
- Part number: ZRA38000
- Condition: Defective
- Location: Bleed Valve
- Stage of operation: CR
- How discovered: O
- Nature of condition: R
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202107073342

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: #2 ENGINE BLEED VALVE FLUCTUATES 38-40 PSI CAUSING THE PACK FLOW TO FLUCTUATE. THIS THEN CAUSES THE CABIN PRESSURE TO FLUCTUATE +200/ - 500 PER MINUTE. REPLACED BLEED REGULATED PRESSURE TRANSDUCER 8HA2 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 36-11-16.

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