# SDR DALA2021030201186

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 2021
- Submitted: March 2, 2021
- Operation: Air carrier
- Aircraft: [N369NW](https://openairdocs.org/aircraft/N369NW), registered now
- Make and model: Airbus A320-212
- Registry model: [Airbus A320-212](https://openairdocs.org/model/airbus-industrie-a320-212) (OpenAirDocs)
- Aircraft serial: 1011
- Aircraft time: 63,874 hours, 29,092 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2021030201186

## Discrepancy

SHIP 3269 ENROUTE TO KCLE @ FL350 WHILE OPERATING ON A SINGLE PACK, CABIN ALTITUDE EXCEEDED 9000' WITH A CABIN DIFFERENTIAL OF 8.6. DECENDED TO FL 310 AND CABIN ALTITUDE CONTINUED TO CLIMB TO A MAX ALTITUDE OF 9500 FEET. DESCENDED TO FL 250 AND CABIN ALTITUDE RETURNED TO NORMAL VALUES. CORRECTIVE ACTION: R&R CPC PER A320 AMM 21-31. OPS CK GOOD AFTER PART REPLACEMENT. (7689030)

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