# SDR ASAA2019052229453

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2019
- Submitted: May 24, 2019
- Operation: Air carrier
- Aircraft: [N469AS](https://openairdocs.org/aircraft/N469AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41702
- Aircraft time: 19,081 hours, 6,286 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 40631997201AB
- Part serial: 9819814
- Condition: Defective
- Location: Cabin Pressure
- Part time: 1,398 hours, 419 cycles
- 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/ASAA2019052229453

## Discrepancy

R2 DOOR STILL SQUEALING IN FLIGHT. NO EFFECT ON PRESSURIZATION, F/A'S REPORT THAT NORMAL CONVERSATION IS DIFFICULT IN AFT GALLEY. GROUNDED - YES. PRESSURIZED AIRCRAFT AND CONFIRMED LOUD SQUEAL @ 4 PSI DIFFERENTIAL PRESSURE. REMOVED AND REPLACED AFT OUTFLOW VALVE ASSEMBLY REF AMM 21-31-03-000-801 AND AMM 23-31-03-400-801. INSTALLATION TEST GOOD. PRESSURIZED AIRCRAFT TO 4 PSI DIFFERENTIAL PRESSURE. NO SQUEAL OR ABNORMAL NOISES NOTED AT R2 DOOR.

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