Individually Owned: 150,657
Corporate Owned: 137,281
Na Airport
Aircraft Accident/Incident Report
Heber City, Utah 84032
Monday, April 17, 2006 10:26 MDT
NTSB Narrative Summary Released at Completion of Accident
Radar data depicted the airplane reverse course from a southerly track to a northerly track. The pilot reported to air route traffic control center (ARTCC) that he had just lost manifold pressure in the left engine and that he needed to go lower. The controller cleared the pilot to descend from 16,000 feet mean sea level (msl) to 14,000 feet msl. The center controller asked the pilot if he had reversed course due to his engine problem and the pilot acknowledged in the affirmative. The controller assigned the pilot another frequency and the pilot acknowledged the frequency change. No further transmissions were made from the pilot on either frequency and radar contact was lost at an encoded altitude of 11,400 feet msl. The wreckage was located in mountainous, down sloping, snow covered, forested terrain. The airplane was destroyed. An examination of the airframe, engines, and airplane systems revealed no anomalies. Radar echoes and satellite data indicated that the accident airplane most likely entered clouds approximately 1010. Based upon the current icing potential algorithm, there was a high likelihood of icing and supercooled large water droplets at 14,000 to 16,000 feet msl in the accident area. Based on area forecasts, PIREPS, and weather advisories, the accident airplane most likely encountered moderate to severe turbulence and moderate to severe mixed icing during the final few minutes before the accident.
NTSB Probable Cause Narrative
the pilot's loss of aircraft control due to the loss of engine power due to induction icing. Contributing factors include the in-flight encounter with structural icing, the severe turbulence, and the pilot's increased workload.
Event Information
| Type of Event | Accident |
| Event Date | 4/17/2006 |
| Event Day of the Week | Monday |
| Time of Event | 1026 |
| Event Time Zone | Mountain Daylight Time |
| Event City | Heber City |
| Event State | UTAH |
| Event Country | -- |
| Zipcode of the event site | 84032 |
| Event Date Year | 2006 |
| Event Date Month | 4 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 402823N |
| Event Location Longitude | 1110807W |
| Event Location Airport | NA |
| Event Location Nearest Airport ID | -- |
| Indicates whether the acc/inc occurred off or on an airport | -- |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1055 Mountain Daylight Time |
| Direction of event from weather observation facility (degrees) | 270 |
| Weather Observation Facility ID | 36U |
| Elevation of weather observation facility | 5637 |
| Distance of event from weather observation facility (units?) | 15 |
| Time Zone of the weather observation | MDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 600 |
| Lowest Non-Ceiling Height | 600 |
| Sky/Lowest/Cloud Conditions | Thin Overcast |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 1 |
| Air Temperature at event time (in degrees celsius) | 2 |
| Dew Point at event time (in degress fahrenheit) | 0 |
| Wind Direction (degrees magnetic) | 10 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 9 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Gusting |
| Wind Gust (knots) | 16 |
| Altimeter Setting at event time (in. Hg) | 29.71 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Fatal |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | 1 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | -- |
| NTSB Docket Number (internal use) | 20909 |
| NTSB Notification Source | FAA-Northwest Mountain Region |
| NTSB Notification Date | Apr 17 2006 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Jan 31 2007 9:40AM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Instrument Meteorological Cond |
| FAA District Office | SLC FAA Flight Standards District Office |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N289WB |
| NTSB Number | DEN06FA065 |
| Missing Aircraft Indicator | Y |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | Yes |
| Damage | Destroyed |
| Aircraft Fire | Ground |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Cessna |
| Aircraft Model | T310R |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 310R0817 |
| Certified Max Gross Weight | 5680 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 4 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Jan 1 2006 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 8834.6 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | On File |
| Aircraft Owner Street Address | On File |
| Aircraft Owner City | Billings |
| Aircraft Owner State | MT |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 59102 |
| Operator is an individual? | Yes |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | -- |
| Operator State | -- |
| Operator Country | -- |
| Operator Zip code | -- |
| Operator Code | -- |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | -- |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | -- |
| Indicates Domestic or International Flight | -- |
| Operator carrying Pax/Cargo/Mail | -- |
| Type of Flying (Per_Bus / Primary) | Business |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | BIL |
| Departure City | Billings |
| Departure State | MT |
| Departure Country | USA |
| Departure Time | 730 |
| Departure Time Zone | MDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | CDC |
| Destination City | Cedar City |
| Destination State | UT |
| Destination Country | USA |
| Specific Phase of Flight | Descent - emergency |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Nov 21 2006 10:31AM |
| User who most recently changed record | BOWL |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |