# SDR ASAA2023072644278

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 2023
- Submitted: July 28, 2023
- Operation: Air carrier
- Aircraft: [N533AS](https://openairdocs.org/aircraft/N533AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35201
- Aircraft time: 45,608 hours, 13,216 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 40631997201AB
- Part serial: 0119845
- Condition: Leaking
- Location: Lower Fuselage
- Part time: 22,078 hours, 7,032 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023072644278

## Discrepancy

F/A REPORTS DURING CLIMB THAT THE R2 DOOR HAS A VERY LOUD SQUEAL. THE NOISE STARTED IN CLIMB @ 5.0PSID DIFF AND STOPPED AT 6.8 DIFF. ALL PRESSURIZATION INDICATIONS NORMAL. NO SQUEAL FROM R2 DOOR DURING DECENT. THE F/A SAID THEY COIULD HEAR NOISE DURING CLIMB FROM RO2 20 AND AFT. NO CREW COMMS PROBLEM. GROUNDED - YES. (RESOLVED ON W/O: 1961871 TASKCARD: N/R-00002 ) PRESSURIZED A/C, NO SQUEAL WAS NOTED OR HEARD. REMOVED OUTFLOW VALVE REF AMM 27-31-03. OPS CHECK GOOD. THIS CLEARS PLT, SEAMC DAVE NOTIFIED.

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