# Incident 20101202054569I: Cessna 421C, Provo, UT, December 2, 2010

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: December 2, 2010, 23:00 local time
- Place: Provo, UT
- Airport: Provo Municipal
- Damage: No damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 40.2192° N, 111.7234° W: Placed by OpenAirDocs at PROVO MUNI (PVU), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.2192&lon=-111.7234&mi=10
- Aircraft: N421CX, registered now (https://openairdocs.org/aircraft/N421CX) (OpenAirDocs)
- Registry model: Cessna 421C (registry code 2076016, https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Registry engine: Continental GTSIO-520 series (registry code 17039, https://openairdocs.org/engine/continental-gtsio-520-series) (OpenAirDocs)
- Reported make and model: CESSNA 421C
- Reported engine: CONT MOTOR GTSIO-520 SER
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Private pilot
- Pilot flight hours: 1,700 total, 600 in this make and model, 20 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20101202054569I

## Narrative

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

ON DECEMBER 2, 2010 AT APPROXIMATELY 1100 PM LOCAL, N421CX, A CESSNA 421C, EXPERIENCED A LOSS OF POWER ON THE LEFT ENGINE WHILE ENROUTE FROM SALT LAKE CITY, UT (SLC) TO CENTINIAL AIRPORT (APA) IN DENVER, CO.  THE PILOT WAS UNABLE TO RESTART SO HE SECURED THE ENGINE THEN DIVERTED TO PROVO, UT (PVU).  WHEN THE AIRCRAFT WAS FOUR MILES FROM THE PROVO AIRPORT, THE RIGHT ENGINE FAILED.  THE PILOT DID NOT SECURE THE RIGHT HAND ENGINE LEAVING THE PROPELLER WINDMILLING.  WHEN THE AIRCRAFT WAS APPROXIMATELY TWO MILES FROM THE PROVO AIRPORT, THE RIGHT HAND ENGINE REGAINED POWER.  THE PILOT APPLIED FULL THROTTLE TO THE RIGHT ENGINE AND WAS ABLE TO LAND SAFELY AT PROVO.  WHEN THE POWER WAS REDUCED TO LAND, THE RIGHT HAND ENGINE FAILED A SECOND TIME.INSPECTION OF THE AIRCRAFT FOUND THAT THE LEFT HAND FUEL PUMP HIGH PRESSURE ADJUSTMENT SCREW WAS STRIPPED ALLOWING THE ANEROID TO MOVE CAUSING AN EXCESSIVELY RICH MIXTURE AND SUBSEQUENT LOSS OF POWER.INSPECTION ALSO FOUND THAT THE LOW SIDE OF THE RIGHT HAND FUEL PRESSURE WAS BELOW THE MANUFACTURER LIMIT.   THIS MAY HAVE RESULTED IN INSUFFICIENT FUEL BEING SUPPLIED TO THE ENGINE WHEN THE RIGHT HAND THROTTLE WAS RETARTED.  THE SECOND FAILURE OF THE RIGHT HAND ENGINE WAS MOST LIKELY CAUSED BY AN EXCESSIVELY RICH MIXTURE DUE TO THE FUEL PUMP BEING SET TO "HIGH" WHEN THE ENGINE FAILED THE FIRST TIME.

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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