Individually Owned: 151,845
Corporate Owned: 143,699
Yampa Valley Airport
Aircraft Accident/Incident Report
Hayden, Colorado 81639
Sunday, February 19, 2012 15:25 MST
NTSB Narrative Summary Released at Completion of Accident
The pilot performed an instrument approach to the runway with an approaching winter storm. A review of on-board global positioning system (GPS) data indicated that the airplane flew through the approach course several times during the approach and was consistently below the glideslope path. The airplane continued below the published decision height altitude and drifted to the right of the runway’s extended centerline. The GPS recorded the pilot’s attempt to perform a missed approach, a rapid decrease in ground speed, and then the airplane descend to the ground, consistent with an aerodynamic stall. Further, the airplane owner, who was also a passenger on the flight, stated that, after the pilot made the two “left turning circles” and had begun a third circle, he perceived that the airplane “just stalled.” An examination of the airframe and engine did not detect any preimpact anomalies that would have precluded normal operation. The airplane’s anti-ice and propeller anti-ice switches were found in the “off” position. A review of weather information revealed that the airplane was operating in an area with the potential for moderate icing and snow. Based on the GPS data and weather information, it is likely that the airframe collected ice during the descent and approach, which affected the airplane’s performance and led to an aerodynamic stall during the climb.
NTSB Probable Cause Narrative
The pilot’s inadvertent stall during a missed approach. Contributing to the accident was the pilot’s operation of the airplane in forecasted icing conditions without using all of its anti-ice systems.
Event Information
| Type of Event | Accident |
| Event Date | 2/19/2012 |
| Event Day of the Week | Sunday |
| Time of Event | 1525 |
| Event Time Zone | Mountain Standard Time |
| Event City | Hayden |
| Event State | COLORADO |
| Event Country | -- |
| Zipcode of the event site | 81639 |
| Event Date Year | 2012 |
| Event Date Month | 2 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 402902N |
| Event Location Longitude | 1071343W |
| Event Location Airport | Yampa Valley Airport |
| Event Location Nearest Airport ID | HDN |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 1 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 6606 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1535 Central Standard Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | HDN |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | CST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 400 |
| Lowest Non-Ceiling Height | 400 |
| 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) | -3 |
| Wind Direction (degrees magnetic) | 290 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 10 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Gusting |
| Wind Gust (knots) | 14 |
| Altimeter Setting at event time (in. Hg) | 29.62 |
| 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 | 2 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | 4 |
| Injury Total All | 6 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 31122 |
| NTSB Notification Source | NW ROC |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | May 14 2013 11:36AM |
| User who most recently changed record | seak |
| Basic weather conditions | Instrument Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N4772A |
| NTSB Number | CEN12FA161 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | Yes |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | CESSNA |
| Aircraft Model | 414A |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 414A0095 |
| Certified Max Gross Weight | -- |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | 2 |
| Cabin Crew Seats | -- |
| Passenger Seats | 6 |
| Total number of seats on the aircraft | 8 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | -- |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | -- |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | C126 |
| Aircraft Owner Name | HUMPAL SCOTT A |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | WOODSBORO |
| Aircraft Owner State | TX |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 78393-0637 |
| Operator is an individual? | Yes |
| Operator Name | HUMPAL SCOTT A |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | WOODSBORO |
| Operator State | TX |
| Operator Country | USA |
| Operator Zip code | 78393-0637 |
| Operator Code | -- |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | No |
| 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) | Personal |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | DHT |
| Departure City | Dalhart |
| Departure State | TX |
| Departure Country | USA |
| Departure Time | 1415 |
| Departure Time Zone | CST |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | HDN |
| Destination City | Hayden |
| Destination State | CO |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Feb 21 2013 2:30PM |
| User who most recently changed record | linj-i |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 10 |
| Runway Length | 9998 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |