# SDR ASAA2023010841486

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 8, 2023
- Submitted: January 11, 2023
- Operation: Air carrier
- Aircraft: [N462AS](https://openairdocs.org/aircraft/N462AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36362
- Aircraft time: 32,055 hours, 10,149 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Outflow Valve
- Part number: UNKNOWN
- Condition: Noisy
- Location: Unknown
- Stage of operation: NR
- 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/ASAA2023010841486

## Discrepancy

FLIGHT ATTENDANTS REPORTED PRESSURIZATION SQUEAL IN AFT GALLEY AREA. NOISE DID NOT INTERFERE WITH COMMUNICATION. GROUNDED - YES. ACCOMPLISHED EA-900ER-21EA-25149 CREATED DEFERRAL ON L/P 60365461 TO REPLACE EXISTING OUTFLOW VALVE WITH A P/N 21230-(*) VALVE WITHIN 150 FLIGHT HOURS OF 01/11/23.

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