National Transportation Safety Board Aviation Accident Final Report Location: Dexter, MO Accident Number: Date & Time: 05/10/2016, 1730 CDT Registration: N86TR Aircraft: BEECH B100 Aircraft Damage: Substantial Defining Event: Collision during takeoff/land Injuries: 4 None Flight Conducted Under: Part 91: General Aviation - Instructional Analysis The commercial pilot was seated in the left seat and conducting a familiarization flight in the airplane. After completing airwork, he returned to the airport and conducted a circling approach, then entered the airport traffic pattern. The right seat pilot read the before landing checklist, and the pilot performed the items accordingly. He stated that, after extending the landing gear, he noted three green lights, indicating that the landing gear were extended and locked. Upon touchdown, the right main landing gear collapsed. The airplane veered off the runway and into a grass area. Postaccident examination of the airplane revealed that the right main landing gear actuator assembly had numerous bent parts and was broken out of its mounting structure. The rigging for the landing gear system could not be checked, nor could functional gear swing test be performed due to damage sustained in the accident. No further testing was conducted. The reason for the landing gear collapse could not be determined. Probable Cause and Findings The National Transportation Safety Board determines the probable cause(s) of this accident to be: A collapse of the right main landing gear for reasons that could not be determined because of the damage to the landing gear system. Findings Aircraft Main landing gear - Not specified (Cause) Page 1 of 5
Factual Information On May 10, 2016, at 1730 central daylight time, a Beech B100, N86TR, impacted runway 18 when the right main landing gear collapsed during landing at Dexter Municipal Airport (DXE), Dexter, Missouri. The airplane sustained substantial damage. The pilot, flight instructor, and two passengers were uninjured. The airplane was operated by Dexter Air LLC under 14 Code of Federal Regulations Part 91 as an instructional flight that was not operating on a flight plan. Visual meteorological conditions prevailed for the flight that last departed from Jonesboro Municipal Airport, Jonesboro, Arkansas at 1650 and was destined to DXE. The pilot stated that the purpose of the flight was a Beechcraft B100 initial training flight with a second pilot who occupied the right pilot seat. According to the Federal Aviation Administration inspector, the flight instructor was in a non-seated position between both pilots. The left seat pilot stated that they flew about 3 hours and had taken turns performing turns, stalls, slow flight and approaches. He stated that the accident landing was the third landing of the day that he performed. He said that during the left downwind approach for landing on runway 18, he performed the airplane checklist items that the flight instructor read to him. The left seat pilot said that the landing gear extended, and the three landing gear position indicator lights illuminated green. The left seat pilot said that during touchdown, the right side of the airplane descended lower than the left side and then the right main landing gear collapsed. The airplane veered off and into a grass area adjacent to the runway. The aircraft came to rest approximately 2,518 feet from runway 18 touchdown end and 100 feet west of the runway edge in a field of grass. The right hand main gear was collapsed, right hand prop blades were bent and the right wing leading edge and tip was damaged. Evidence of fuel leakage was noted surrounding the right wing in the grass. The wing top skin outboard of the engine nacelle displayed evidence of wrinkling. Post-accident examination revealed the bottom right wing skin to the integral fuel tank was torn resulting in an approximate five by three inch hole. The right main gear actuator assembly exhibited numerous bent parts and was broken out of its mounting structure. The inboard top actuator mounting structure was torn away from the airframe. The right nacelle fuel tank bulkhead was ruptured with the top of the gear actuator resting inside the tank area. The top wing skin wrinkling was not as evident post recovery but still shows signs of damage. Puncture damage to the fuselage pressure vessel was noted in 5 places below the copilot side window and a two-inch crack or tear was found on the belly skin approximately centered between the main gear legs. The rigging for the landing gear system could not be checked nor could functional gear swing test be performed due to damage incurred to the system from the accident. Page 2 of 5
History of Flight Landing-flare/touchdown Landing-landing roll Landing gear collapse Collision during takeoff/land (Defining event) Pilot Information Certificate: Commercial Age: 44, Male Land Other Aircraft Rating(s): None Restraint Used: Lap Only Instrument Rating(s): Airplane Second Pilot Present: Yes Instructor Rating(s): None Toxicology Performed: No Medical Certification: Class 2 With Waivers/Limitations Last FAA Medical Exam: 07/20/2015 Pilot Information 1333 hours (Total, all aircraft), 16 hours (Total, this make and model), 1333 hours (Pilot In Command, all aircraft), 51 hours (Last 90 days, all aircraft), 19 hours (Last 30 days, all aircraft), 3 hours (Last 24 hours, all aircraft) Certificate: Commercial Age: 79, Male Land Other Aircraft Rating(s): None Restraint Used: Lap Only Instrument Rating(s): Airplane Second Pilot Present: Yes Instructor Rating(s): Airplane Multi-engine; Airplane Single-engine; Instrument Airplane Toxicology Performed: Medical Certification: Class 2 With Waivers/Limitations Last FAA Medical Exam: 11/24/2015 Flight Instructor Information Certificate: Airline Transport; Commercial Age: 85, Male Other Aircraft Rating(s): Land; Single-engine Sea Restraint Used: Instrument Rating(s): Second Pilot Present: Yes Instructor Rating(s): Toxicology Performed: No Left Right No Center Medical Certification: Class 2 With Waivers/Limitations Last FAA Medical Exam: 07/30/2016 Page 3 of 5
Aircraft and Owner/Operator Information Aircraft Manufacturer: BEECH Registration: N86TR Model/Series: B100 Aircraft Category: Airplane Year of Manufacture: 1977 Amateur Built: No Airworthiness Certificate: Normal Serial Number: BE-22 Landing Gear Type: Retractable - Tricycle Seats: 9 Date/Type of Last Inspection: 04/25/2016, Continuous Airworthiness Certified Max Gross Wt.: 1180 lbs Time Since Last Inspection: Engines: 2 Turbo Prop Airframe Total Time: 17777 Hours as of last inspection Engine Manufacturer: Garrett ELT: Installed, not activated Engine Model/Series: TPE 331-6-251 Registered Owner: Dexter Air LLC Rated Power: 715 hp Operator: Dexter Air LLC Operating Certificate(s) Held: None Meteorological Information and Flight Plan Conditions at Accident Site: Visual Conditions Condition of Light: Day Observation Facility, Elevation: POF, 331 ft msl Observation Time: 1653 CDT Distance from Accident Site: 18 Nautical Miles Direction from Accident Site: 270 Lowest Cloud Condition: Few / 3000 ft agl Temperature/Dew Point: 27 C / 20 C Lowest Ceiling: None Visibility 9 Miles Wind Speed/Gusts, Direction: 12 knots, 210 Visibility (RVR): Altimeter Setting: Visibility (RVV): Precipitation and Obscuration: No Obscuration; No Precipitation Departure Point: Jonesboro, MO (JBR) Type of Flight Plan Filed: None Destination: Dexter, MO Type of Clearance: None Departure Time: 1650 CDT Type of Airspace: Airport Information Airport: Dexter Municipal Airport (DXE) Runway Surface Type: Asphalt Airport Elevation: 304 ft Runway Surface Condition: Dry Runway Used: 18 IFR Approach: None Runway Length/Width: 5000 ft / 100 ft VFR Approach/Landing: Traffic Pattern Page 4 of 5
Wreckage and Impact Information Crew Injuries: 2 None Aircraft Damage: Substantial Passenger Injuries: 2 None Aircraft Fire: None Ground Injuries: N/A Aircraft Explosion: None Total Injuries: 4 None Latitude, Longitude: 36.775556, -89.941111 (est) Administrative Information Investigator In Charge (IIC): Mitchell F Gallo Adopted Date: 03/19/2018 Additional Participating Persons: Dennis Mueller; Federal Aviation Administration; STL FSDO; St. Ann, MO Publish Date: 03/19/2018 Note: The NTSB did not travel to the scene of this accident. Investigation Docket: http://dms.ntsb.gov/pubdms/search/docklist.cfm?mkey=93191 The National Transportation Safety Board (NTSB), established in 1967, is an independent federal agency mandated by Congress through the Independent Safety Board Act of 1974 to investigate transportation accidents, determine the probable causes of the accidents, issue safety recommendations, study transportation safety issues, and evaluate the safety effectiveness of government agencies involved in transportation. The NTSB makes public its actions and decisions through accident reports, safety studies, special investigation reports, safety recommendations, and statistical reviews. The Independent Safety Board Act, as codified at 49 U.S.C. Section 1154(b), precludes the admission into evidence or use of any part of an NTSB report related to an incident or accident in a civil action for damages resulting from a matter mentioned in the report. Page 5 of 5