# SDR 2000UALA00301

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 4, 2000
- Submitted: October 4, 2000
- Operation: Air carrier
- Aircraft: N410UA
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 463
- Aircraft time: 21,315 hours, 7,673 cycles
- Engine: Iae V2527A5
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part serial: MR2130133
- Condition: Fluctuates
- Location: Aft Fuselage
- Part time: 3 hours, 2 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2000UALA00301

## Discrepancy

PASSING  THROUGH 18,000 FEET, LARGE FLUCTUATIONS IN CABIN VERTICAL SPEED (SYS 1).  *S/D*  REPLACED OUTFLOW VALVE AND BOTH PRESSURE CONTROLLERS.

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