# SDR K11A2026092400392

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 24, 2026
- Submitted: September 24, 2026
- Operation: Air carrier
- Aircraft: [N733CK](https://openairdocs.org/aircraft/N733CK), registered now
- Make and model: Boeing 737436
- Aircraft serial: 25849
- Aircraft time: 61,615 hours, 41,756 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Control Panel
- Part number: 7110025
- Part serial: 10234
- Condition: Failed
- Location: Cabin Pressure
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/K11A2026092400392

## Discrepancy

PRESSURIZATION FAIL DURING DESCENT, MANUAL MODE DID NOT WORK.  REMOVED AND REPLACED PRESSURE CONTROL MODULE IAW AMM 21-31-25, OPS CHECK PERFORMED IAW AMM 21-31-00/205 OPS CHECK GOOD NO DEFECTS NOTED, REF LP 737-004-8615 ITEM #2. PERFORMED CABIN PRESSURIZATION LEAK CHECK CHECKS IAW AMM 5-51-91 OPS AND LEAK CHECK GOOD NO DEFECTS NOTED

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