# SDR 3EJA7365/31/22

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 31, 2022
- Submitted: July 29, 2022
- Operation: Air carrier
- Aircraft: [N736JS](https://openairdocs.org/aircraft/N736JS), registered now
- Make and model: Cessna 525B
- Registry model: [Cessna 525B](https://openairdocs.org/model/cessna-525b) (OpenAirDocs)
- Aircraft serial: 525B0023
- Aircraft time: 3,046 hours, 1,983 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Pressure Valve
- Part number: 5253001
- Part serial: 0232
- Condition: Abnormal
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/3EJA7365%2F31%2F22

## Discrepancy

PRESSURIZATION CONTROLLER SHOWS ERRATIC CHANGES AND OUTFLOW VALE AUDIBLY CHANGING/ MOVING. TROUBLESHOT WITH TEXTRON REP, COULD NOT DUPLICATE ON GROUND, PER TECH REP ADVICE, R&R R/H BI-LEVEL FLOW FLOW CONTROL VALVE IAW CE525B 21-30-00. OPS CHECK GOOD

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