Individually Owned: 150,657
Corporate Owned: 137,281
Minden-Tahoe Airport
Aircraft Accident/Incident Report
Minden, Nevada 89423
Friday, May 2, 2008 18:40 PDT
NTSB Narrative Summary Released at Completion of Accident
While beginning a 90-degree right turn onto the active runway for takeoff, both the left and right main landing gear partially collapsed. A Federal Aviation Administration inspector said the airplane's clam shell gear doors remained in the closed position, which is inconsistent with the landing gear being in an intransit operating mode, and the gear select handle was found in the DOWN position. The left main landing gear's inboard clevis, which secures the left gear's inboard hydraulic actuator to the gear's trunnion boss, was fractured. It had been installed incorrectly and had missed the barrel nut, which retains the clevis in the trunnion. When removed, the clevis bolt rotated relatively easily and the nut appeared to be incorrectly located. Maintenance personnel who had installed the clevis during the previous inspection, 26 days and 13 operating hours before the accident, stated that the breakage of the clevis pin would not be caused by the installation. A metallurgical examination of the fracture region revealed that the clevis failed during a single bending overstress event. No preexisting cracks or corrosion were noted at the fracture and the laboratory could not determine an underlying reason for the overstress fracture. The main landing gear is retained in the down and locked position by hydraulic pressure being applied to the inboard main landing gear actuating cylinder, as well as being assisted by the outboard main landing gear (hydraulic-pneumatic) actuating cylinder. Additionally, bungee cords attached to the main landing gear drag braces assures that the main landing gear is locked and retained in the down position. As a result of these redundant features that are designed to ensure that the main landing gear is locked in the down position, the gear collapse cannot be positively attributed to the failure of the clevis. An inspection of the right main landing gear's components failed to reveal any anomalies that would have precluded normal operation. After the failed clevis was replaced, multiple landing gear retraction and extension cycles were performed with no anomalies noted. The reason for the gear collapse was undetermined.
NTSB Probable Cause Narrative
The collapse of both main landing gear for undetermined reasons.
Event Information
| Type of Event | Accident |
| Event Date | 5/2/2008 |
| Event Day of the Week | Friday |
| Time of Event | 1840 |
| Event Time Zone | Pacific Daylight Time |
| Event City | Minden |
| Event State | NEVADA |
| Event Country | -- |
| Zipcode of the event site | 89423 |
| Event Date Year | 2008 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 390004N |
| Event Location Longitude | 1194507W |
| Event Location Airport | Minden-Tahoe |
| Event Location Nearest Airport ID | MEV |
| 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 | 4722 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1853 Pacific Daylight Time |
| Direction of event from weather observation facility (degrees) | 225 |
| Weather Observation Facility ID | TVL |
| Elevation of weather observation facility | 6264 |
| Distance of event from weather observation facility (units?) | 15 |
| Time Zone of the weather observation | PDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 8500 |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | -- |
| Sky Condition for Lowest Ceiling | Broken |
| 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) | -5 |
| Wind Direction (degrees magnetic) | 180 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 7 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.1 |
| 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) | 25130 |
| NTSB Notification Source | Regional Operations Center |
| NTSB Notification Date | May 2 2008 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Mar 2 2009 6:29PM |
| User who most recently changed record | stam |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Reno, Nevada |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N980AK |
| NTSB Number | SEA08LA117 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | No |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | ROCKWELL |
| Aircraft Model | 690C |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 11636 |
| Certified Max Gross Weight | 12500 |
| 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 | 9 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Mar 28 2008 12:00AM |
| Airframe hours since last inspection | 13 |
| Airframe Hours | 5204.2 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | Unknown |
| Aircraft Owner Name | Universal Pacific Investment |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Bend |
| Aircraft Owner State | OR |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 97701 |
| Operator is an individual? | No |
| Operator Name | William D Killebrew |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | Glenbrook |
| Operator State | NV |
| Operator Country | USA |
| Operator Zip code | 89413 |
| 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 | Yes |
| Departure Airport Code | MEV |
| Departure City | Minden |
| Departure State | NV |
| Departure Country | USA |
| Departure Time | -- |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | MRY |
| Destination City | Monterey |
| Destination State | CA |
| Destination Country | USA |
| Specific Phase of Flight | Taxi - to takeoff |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Mar 2 2009 6:29PM |
| User who most recently changed record | stam |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 16 |
| Runway Length | 7400 |
| Runway Width | 100 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |