Individually Owned: 150,657
Corporate Owned: 137,281
Double Eagle II Airport
Aircraft Accident/Incident Report
Albuquerque, New Mexico 87121
Saturday, March 10, 2007 15:58 MST
NTSB Narrative Summary Released at Completion of Accident
The company's chief pilot and student instructor had performed four successful touch-and-go landings. On the mishap landing, the student instructor started his flare at normal approach speed about 2 to 3 feet above the runway. As the airplane settled, the chief pilot raised the nose of the airplane slightly to prevent a bounced landing. The airplane subsequently ballooned. They elected to perform a go-around. The chief pilot advanced the power and "pitched the airplane to the landing attitude." The airplane settled to the runway in a slight left crab, touching down on the left main landing gear, which subsequently broke aft. The airplane came down on the runway and slid for 300 feet, departing the left side and flipping over onto its back. The airplane had been recently purchased by the company. Total airframe time was approximately 25 hours. An examination of the airplane showed the left main lower landing gear tube had fractured due to overstress at the landing gear wheel and brake attachment fitting. The overstress appeared consistent with a hard landing impact as a small compression buckle was observed at the top of the part and some tensile indications were seen at the bottom. There were also contact impressions on the inside of the tube most-likely made by the end of the main landing gear spring bar. The wheel and brake attachment fitting was identified as a steel with designation St37, according to the German DIN classification for steels. The St37 steel is specified to have a yield strength of at least 34 ksi (235 MPa) and tensile strength between 51 ksi and 70 ksi (350 MPa to 480 MPa). According to the ASM Metals Handbook, St37 is similar to SAE 1013 steel, which is a low-carbon steel. Hardness measurements on the fitting averaged 63.5 Rockwell B, with a standard deviation of 2 Rockwell B. For steel, a hardness of 65 Rockwell B corresponds to a tensile strength of 56 ksi, so the fitting appears to be within specification. This steel is at the lower end of the range of strength possible for steel. The ASM Metals Handbook indicates that fatigue resistance would also improve with increasing tensile strength. Information from the manufacturer indicates that the gear assembly was designed in accordance with ASTM F 2245, and successfully passed a drop test of 550 mm (21.7 inches) at a weight of 600 kg (1323 pounds).
**This narrative was modified on August 13, 2007.**
NTSB Probable Cause Narrative
The total failure of the left main landing gear strut due to overload during the landing resulting in the loss of control and subsequent nose over. A factor contributing to the accident was the chief pilot 's inability to maintain directional control of the airplane after the landing gear failed.
**This report was modified on August 13, 2007.**
Event Information
| Type of Event | Accident |
| Event Date | 3/10/2007 |
| Event Day of the Week | Saturday |
| Time of Event | 1558 |
| Event Time Zone | Mountain Standard Time |
| Event City | Albuquerque |
| Event State | NEW MEXICO |
| Event Country | -- |
| Zipcode of the event site | 87121 |
| Event Date Year | 2007 |
| Event Date Month | 3 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 350843N |
| Event Location Longitude | 1064743W |
| Event Location Airport | Double Eagle II Airport |
| Event Location Nearest Airport ID | AEG |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0.5 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 5837 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1550 Mountain Standard Time |
| Direction of event from weather observation facility (degrees) | 270 |
| Weather Observation Facility ID | AEG |
| Elevation of weather observation facility | 5837 |
| Distance of event from weather observation facility (units?) | 1 |
| Time Zone of the weather observation | MST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | 110 |
| Sky/Lowest/Cloud Conditions | Few |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 17 |
| Dew Point at event time (in degress fahrenheit) | -8 |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.05 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | 2 |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 21780 |
| NTSB Notification Source | FAA-Southwest Region |
| NTSB Notification Date | Mar 10 2007 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Jul 25 2007 12:22PM |
| User who most recently changed record | NTSB\lema |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Albuquerque, NM FSDO |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N102RK |
| NTSB Number | DEN07FA068 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Flight Design USA |
| Aircraft Model | CT-SW |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 06-11-15 |
| 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 | Annual |
| Date of Last Inspection | Feb 1 2007 12:00AM |
| Airframe hours since last inspection | 1 |
| Airframe Hours | 25 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | RK Aviation, Inc. |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Albuquerque |
| Aircraft Owner State | NM |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 87121 |
| Operator is an individual? | No |
| Operator Name | Bode Aviation, Inc. |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 7401 Paseo del Volcan, NW |
| Operator City | Albuquerque |
| Operator State | NM |
| Operator Country | USA |
| Operator Zip code | 87121 |
| 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) | Instructional |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | Yes |
| Departure Airport Code | AEG |
| Departure City | Albuquerque |
| Departure State | NM |
| Departure Country | USA |
| Departure Time | 1500 |
| Departure Time Zone | MST |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | -- |
| Destination City | -- |
| Destination State | -- |
| Destination Country | -- |
| Specific Phase of Flight | Landing - aborted |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jun 19 2007 11:19AM |
| User who most recently changed record | BOWL |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 22 |
| Runway Length | 7400 |
| Runway Width | 100 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |