# Incident 20230520004269I: Pilatus PC-12/45, Ogden, UT, May 20, 2023

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: May 20, 2023, 05:30 local time
- Place: Ogden, UT
- Airport: Ogden-Hinckley
- Damage: No damage
- Phase of flight: Takeoff: Climb Out
- Operating rules: Air taxi and commuter (Part 135)
- Operator: KNIA
- Location: 41.1951° N, 112.0122° W: Placed by OpenAirDocs at OGDEN-HINCKLEY (OGD), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.1951&lon=-112.0122&mi=10
- Aircraft: N515RP, registered now (https://openairdocs.org/aircraft/N515RP) (OpenAirDocs)
- Registry model: Pilatus PC-12/45 (registry code 7090551, https://openairdocs.org/model/pilatus-pc-12-45) (OpenAirDocs)
- Registry engine: Pratt & Whitney Canada PT6A-60A (registry code 52043, https://openairdocs.org/engine/pratt-whitney-canada-pt6a-60a) (OpenAirDocs)
- Reported make and model: PILATUS PC-12/45
- People aboard: 1
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Commercial pilot
- Pilot flight hours: 2,500 total
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20230520004269I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

^PRIVACY DATA OMITTED^LEFT OGD AT APPROXIMATELY 0500 ON A POSITIONING FLIGHT. AT FL23 THE PIC RECEIVED A CAUTION MESSAGE RELATING TO CABIN PRESSURE. HE NOTICED THE CABIN ALTITUDE WAS CRESTING 10,000 FT. AT THIS POINT HE DECIDED TO DON HIS OXYGEN MASK. HE LEVELED THE AIRCRAFT OUT AT FL 25 AT THIS POINT THE CABIN ALTITUDE WAS 14,000 FT. HE INITIATED AN EMERGENCY DESCENT TO APPROXIMATELY FL12 AND RETURNED TO OGD.

THE AIRCRAFT WAS TAKEN TO ^PRIVACY DATA OMITTED^FOR REPAIR. THEY DETERMINED AN THE CABIN OUTFLOW VALVE WAS FAILED AND THE ENGINE BLEED VALVE WAS INTERMITTENTLY WORKING. BOTH WERE REPLACED. A GROUND PRESSURIZATION WAS PERFORMED POST MAINTENANCE AND THE AIRCRAFT PRODUCED A HIGHER THAN REQUIRED LEAK DOWN RATE. THE AIRCRAFT WAS RETURNED TO SERVICE.

OUTFLOW VALVE P/N 103784-1 S/N 108-A0187

BLEED VALVE  P/N 2943A000 S/N 1812

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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