# SDR UIEA2020101202224

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 11, 2020
- Submitted: October 15, 2020
- 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: 98,919 hours, 20,438 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Actuator
- Part number: 202248013
- Part serial: 1011518
- Condition: Malfunctioned
- Location: Outflow Valve
- Stage of operation: CR
- 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/UIEA2020101202224

## Discrepancy

DURING CRUISE OUTFLOW VALVE BRIEFLY OPENED AND CLOSED, CREATING A RUBBLE/SHUDDER.  PER T/S REMOVED AND REPLACED AUTO 1 CABIN PRESSURE CONT UNIT, IAW AMM 21-31-02.  OPERATIONS CHECK GOOD.  OFF PART: PN 21173888, SN 62-A0346.  REMOVED AND REPLACED AUTO 2 CABIN PRESSURE CONTROLLER UNIT, IAW AMM 21-31-02.  OPERATIONS CHECK GOOD.  OFF PART: PN 2117388-8, SN 62-A0276.  REMOVED AND REPLACED CABIN PRESSURE OUTFLOW VALVE ACTUATOR, IAW AMM 21-31-04.  PERFORMED WIRE RESISTANCE CHECKS, IAW AMM 21-31-11 AND WDM 21-31-21. NO DEFECTS NOTED AT THIS TIME.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.