Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Farmersville, Texas 75442
Thursday, August 14, 2008 11:00 CDT
NTSB Narrative Summary Released at Completion of Accident
According to the private pilot receiving instruction, during the flight he became aware of increased airflow on his side of the airplane and noted that the canopy on the flight instructor's side had become unlatched. He mentioned this to the flight instructor and the flight instructor attempted to relatch the canopy. The canopy came completely unlatched and opened to a position of 50 degrees. The nose of the airplane pitched down violently to 60 degrees. The open canopy disrupted the airflow over the empennage resulting in a stalled condition. Neither the private pilot nor flight instructor was able to close the canopy or recover the airplane from the nose low attitude. An examination of the airframe, power plant, and flight control surfaces revealed no anomalies. The latching bolts and latches related to the canopy exhibited scratching consistent with the flexing and movement of the canopy assembly. There is no mechanism to relatch just one side of the canopy without opening the other side of the canopy. According to the pilot operating handbook emergency procedures, in the event that the canopy becomes completely unlatched, the pilot is to ignore the open canopy and wind noise and land the airplane normally. The emergency procedures imply that the airplane is controllable when the canopy is open. The emergency procedures do not address a partially open canopy. Further review of the pilot operating handbook revealed conflicting airspeed information between several chapters in the book and with the markings on the airspeed indicator in the airplane.
NTSB Probable Cause Narrative
The inadvertent tail stall and subsequent loss of airplane control as a result of the open canopy. Contributing to the accident was the inadequate emergency procedures provided by the airplane manufacturer and the inadequate design of the canopy latching mechanism.
Event Information
| Type of Event | Accident |
| Event Date | 8/14/2008 |
| Event Day of the Week | Thursday |
| Time of Event | 1100 |
| Event Time Zone | Central Daylight Time |
| Event City | Farmersville |
| Event State | TEXAS |
| Event Country | -- |
| Zipcode of the event site | 75442 |
| Event Date Year | 2008 |
| Event Date Month | 8 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 330923N |
| Event Location Longitude | 0962854W |
| Event Location Airport | -- |
| Event Location Nearest Airport ID | -- |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| 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 | 1105 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 110 |
| Weather Observation Facility ID | KGVT |
| Elevation of weather observation facility | 535 |
| Distance of event from weather observation facility (units?) | 15 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | -- |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 31 |
| Dew Point at event time (in degress fahrenheit) | 18 |
| Wind Direction (degrees magnetic) | 210 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 4 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.94 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Serious |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | 1 |
| Injury Total None | -- |
| Injury Total Serious | 1 |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 25216 |
| NTSB Notification Source | FAA ASW ROC |
| NTSB Notification Date | Aug 14 2008 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Mar 10 2009 4:09PM |
| User who most recently changed record | kaij |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | DAL |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N451BB |
| NTSB Number | DEN08FA140 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Aircraft Mfg & Dev. Co. (AMD) |
| Aircraft Model | CH601XLi |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 601-051S |
| Certified Max Gross Weight | 1320 |
| 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 | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Jul 8 2008 12:00AM |
| Airframe hours since last inspection | 36 |
| Airframe Hours | 131.5 |
| ELT Installed | Yes |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | LCI Solutions Incorporated |
| Aircraft Owner Street Address | 2408 Hopkins Drive |
| Aircraft Owner City | Plano |
| Aircraft Owner State | TX |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 75025 |
| Operator is an individual? | No |
| Operator Name | LCI Solutions Incorporated |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | 2408 Hopkins Drive |
| Operator City | Plano |
| Operator State | TX |
| Operator Country | USA |
| Operator Zip code | 75025 |
| 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 | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | TKI |
| Departure City | McKinney |
| Departure State | TX |
| Departure Country | USA |
| Departure Time | 1030 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | TKI |
| Destination City | McKinney |
| Destination State | TX |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Mar 10 2009 3:25PM |
| User who most recently changed record | kaij |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | N/A |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |