# SDR UIEA2021032600716

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 25, 2021
- Submitted: March 26, 2021
- Operation: Air carrier
- Aircraft: [N1997A](https://openairdocs.org/aircraft/N1997A), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 27310
- Aircraft time: 99,822 hours, 20,749 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 21173888
- Part serial: 95828
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2021032600716

## Discrepancy

AUTO PRESSURIZATION CNTRL 2 STARTED GETTING LARGE SWINGS IN CABIN RATE APPROACHING MAX DIFF THEN BACK DOWN(<P>RAN FIM 21-31 FT 803. RECEIVED CONTROLLER FAILURE ON CABIN AUTO 2. REMOVED AND REPLACED CONTROLLER IAW AMM 21-31-02. OPS CHECK NORMAL. STATUS MSG CLEARED.<BR /></P>)

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