# SDR DXTA2026011306507

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 11, 2026
- Submitted: January 13, 2026
- Operation: Air carrier
- Aircraft: N689QS
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605659
- Aircraft time: 16,449 hours, 12,492 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 991240919
- Part serial: 1052B
- Condition: Faulty
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026011306507

## Discrepancy

ON DEPARTURE CABIN WAS NOT PRESSURIZING AND THE RATE OF CLIMB INDICATOR WAS MIRRORING THE AIRCRAFTS VERTICAL SPEED. WE TRIED MANUAL PRESS AND THE CHERRY PICKER WITH NO SUCCESS. MASKS DID NOT DEPLOY WE NEVER EXCEEDED 6000' AND WE WERE UNDER MAX LANDING WEIGHT FOR LANDING.   REMOVED DEFECTIVE PRIMARY OUTFLOW VALVE  AND INSTALLED A CUSTOMER SUPPLIED INSPECTED PRIMARY OUTFLOW VALVE  REF AMM 21-30-00

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