# SDR QMLA2025072620080

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2025
- Submitted: July 26, 2025
- Operation: Air carrier
- Aircraft: [N796PC](https://openairdocs.org/aircraft/N796PC), registered now
- Make and model: Pilats PC1247
- Aircraft serial: 796
- Aircraft time: 7,157 hours, 9,001 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: O-Ring
- Condition: Pinched
- Location: Acm
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2025072620080

## Discrepancy

CABIN PRESSURIZATION DUMPED WHEN CLIMBING THROUGH FL200. SYSTEM WOULD NOT RESPOND TO ANY INPUTS TO THE CONTROLLER. IS AIRCRAFT HAS BEEN RETURNED TO REVENUE SERVICE, REF # MEC-012747. REPLACED PINCHED O-RING ON INLET
TUBE TO COLD AIR UNIT, TEST FLIGHT WAS GOOD.

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