Individually Owned: 150,657
Corporate Owned: 137,281
Mack-Mesa Airport
Aircraft Accident/Incident Report
Mack, Colorado 81525
Saturday, August 14, 2010 8:50 MDT
NTSB Narrative Summary Released at Completion of Accident
The certificated flight instructor (CFI) and his student were practicing a 180-degree autorotation with a power recovery occurring at the hover. The helicopter's sink rate increased dramatically in the flare, about 40 feet above the ground. The CFI initiated a go-around by increasing power, raising the collective, and pushing the cyclic forward. The helicopter continued to descend and contacted the runway in a level attitude. After it came to a stop, the CFI confirmed that the main rotor blade had struck the tail boom. The instructor reported that there were no preimpact mechanical deficiencies with the helicopter.
NTSB Probable Cause Narrative
The flight instructor's failure to maintain control of the helicopter during a practice autorotation, which resulted in a hard landing.
Event Information
| Type of Event | Accident |
| Event Date | 8/14/2010 |
| Event Day of the Week | Saturday |
| Time of Event | 850 |
| Event Time Zone | Mountain Daylight Time |
| Event City | Mack |
| Event State | COLORADO |
| Event Country | -- |
| Zipcode of the event site | 81525 |
| Event Date Year | 2010 |
| Event Date Month | 8 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 391603N |
| Event Location Longitude | 1085130W |
| Event Location Airport | Mack-Mesa Airport |
| Event Location Nearest Airport ID | C07 |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Unknown |
| Time of the weather observation | |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | -- |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | -- |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | -- |
| Sky Condition for Lowest Ceiling | -- |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | -- |
| Air Temperature at event time (in degrees celsius) | -- |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | -- |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 27550 |
| NTSB Notification Source | NWR ROC |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Dec 20 2010 12:31PM |
| User who most recently changed record | kelz |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N404LE |
| NTSB Number | CEN10CA485 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | Unknown |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | -- |
| Aircraft Manufacturer's Full Name | ROBINSON HELICOPTER |
| Aircraft Model | R22 BETA |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 4040 |
| Certified Max Gross Weight | -- |
| Aircraft Category | Helicopter |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | -- |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | -- |
| ELT Installed | Unknown |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | NEBO HELICOPTER REBUILD LLC |
| Aircraft Owner Street Address | 826 N 100 E STE 7 |
| Aircraft Owner City | SPANISH FORK |
| Aircraft Owner State | UT |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 84660-1241 |
| Operator is an individual? | No |
| Operator Name | North Canyon Helicopters |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | -- |
| Operator City | Spanish Fork |
| Operator State | UT |
| Operator Country | USA |
| Operator Zip code | -- |
| 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) | Instructional |
| Second Pilot on Board | -- |
| Departure Point Same as Event | No |
| Departure Airport Code | -- |
| Departure City | Grand Junction |
| Departure State | CO |
| Departure Country | USA |
| Departure Time | -- |
| Departure Time Zone | -- |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | C07 |
| Destination City | Mack |
| Destination State | CO |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Sep 17 2010 10:02AM |
| User who most recently changed record | yeal |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 07 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |