# SDR 2022F00316

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 6, 2022
- Submitted: August 11, 2022
- Operation: General aviation
- Make and model: Boeing 737
- Aircraft serial: 27458
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Flow Valve
- Part number: 3964421
- Part serial: 2818
- Condition: Failed
- Location: Zone 100
- Stage of operation: CR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022F00316

## Discrepancy

RAPID DEPRESURIZATION. CABIN ALTITUDE WARNING UNCONTROLLED UNCONTROLLED. LEFT PACK TRIPOFF IN FLIGHT UNCONTROLLED. LEFT ENG BLEED SHUTOFF VALVE FAILED. CORRECTIVE ACTION: REMOVED AND REPLACED FLOW CONTROL VALVE IAW AMM 21-51-00/10. BLEED AIR REGULATOR WAS REPLACED IA AMM 36-11-16.

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