Individually Owned: 150,657
Corporate Owned: 137,281
Idaho Falls Regional Airport
Aircraft Accident/Incident Report
Idaho Falls, Idaho 83401
Tuesady, September 28, 2010 19:40 MDT
NTSB Narrative Summary Released at Completion of Accident
According to the pilot, he lowered the landing gear handle during a straight-in approach to a planned full-stop landing. Subsequently all three green "gear safe" lights illuminated, and the red "gear unsafe" light terminated its illumination. The pilot executed a normal landing touchdown on the main landing gear; however, during the landing roll the gear warning horn sounded, the red "gear unsafe" light illuminated, and the airplane began to settle toward the runway. The pilot then executed a go-around, during which the tail contacted the runway. The pilot continued the go-around, lowered the gear manually, and made an uneventful landing. A postaccident inspection revealed that for reasons that were unable to be determined, the weight of the airplane, which should have been carried by the over-center gear down locks, had been carried by the gear actuator system instead. This led to the tripping of the circuit breaker protecting the actuator electrical system, and ultimately to structural failures within the mechanical portion of the actuator system, which allowed the landing gear to partially retract.
NTSB Probable Cause Narrative
The partial retraction/collapse of the main landing gear during the landing roll for undetermined reasons.
Event Information
| Type of Event | Incident |
| Event Date | 9/28/2010 |
| Event Day of the Week | Tuesday |
| Time of Event | 1940 |
| Event Time Zone | Mountain Daylight Time |
| Event City | Idaho Falls |
| Event State | IDAHO |
| Event Country | -- |
| Zipcode of the event site | 83401 |
| Event Date Year | 2010 |
| Event Date Month | 9 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 433049N |
| Event Location Longitude | 1120415W |
| Event Location Airport | Idaho Falls Regional |
| Event Location Nearest Airport ID | KIDA |
| 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 | Pilot |
| 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 | Dusk |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | Clear |
| 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) | 23 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 190 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 6 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| 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 | 1 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 28495 |
| NTSB Notification Source | FAA Operations Center |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | May 27 2011 6:20PM |
| User who most recently changed record | stam |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N124BK |
| NTSB Number | WPR10IA482 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Minor |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | BEECH |
| Aircraft Model | F90 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | LA15 |
| Certified Max Gross Weight | 10950 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | 1 |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 7 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Sep 21 2010 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 8014 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | C126 |
| Aircraft Owner Name | MTB INVESTMENTS LLC |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | IDAHO FALLS |
| Aircraft Owner State | ID |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 83402 |
| Operator is an individual? | No |
| Operator Name | MTB INVESTMENTS LLC |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | IDAHO FALLS |
| Operator State | ID |
| Operator Country | USA |
| Operator Zip code | 83402 |
| 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 | KWYS |
| Departure City | W. Yellowstone |
| Departure State | MT |
| Departure Country | USA |
| Departure Time | 1915 |
| Departure Time Zone | MDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | KIDA |
| Destination City | Idaho Falss |
| Destination State | ID |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | May 27 2011 6:12PM |
| User who most recently changed record | stam |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | 20 |
| Runway Length | 9002 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |