# NTSB CEN16LA187: Beech B100, N86TR, Dexter, MO, May 10, 2016 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 10, 2016, 17:30 local (22:30 UTC) - Place: Dexter, MO - Coordinates: 36.775554, -89.941108 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=36.7756&lon=-89.9411&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report March 19, 2018 - Report: Approved by Office Director - NTSB office: Central Region - Parties: Federal Aviation Administration; STL FSDO - NTSB case key (mKey): 93191 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN16LA187 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/93191/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=93191 - Page: https://openairdocs.org/ntsb/CEN16LA187 ## Probable cause 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 NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: main landing gear](https://openairdocs.org/ntsb-findings/01023210): Aircraft › Aircraft systems · Not specified (probable cause); cases with it: [Beech B100, 1 case](https://openairdocs.org/ntsb-findings/01023210/cases.md?model=1152919), [All aircraft, 241 cases](https://openairdocs.org/ntsb-findings/01023210/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Beech B100, 3 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=1152919), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) - [Landing-landing roll: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490) (defining event); cases with it: [Beech B100, 1 case](https://openairdocs.org/ntsb-events/490/sequence.md?model=1152919), [All aircraft, 1,309 cases](https://openairdocs.org/ntsb-events/490/sequence.md) ## 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. ## Factual narrative 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. ## Aircraft - Registration: [N86TR](https://openairdocs.org/deregistered/N86TR-2019-02-27), registration cancelled 2019-02-27, S/N BE-22, built 1977 (OpenAirDocs) - Reported make and model: BEECH B100 - Registry model: [Beech B100](https://openairdocs.org/model/beech-b100) (registry code 1152919) (OpenAirDocs) - Registry engine: [AiResearch TPE331-5&6SER](https://openairdocs.org/engine/airesearch-tpe331-5-6ser) (registry code 01515, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: BE-22 - Year built: 1977 - Airframe hours: 17777 - Engines: Garrett TPE 331-6-251 715 horsepower turbo prop; Garrett TPE 331-6-251 715 horsepower turbo prop - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Dexter Air LLC - Registered owner: Dexter Air LLC - Airworthiness certificate: Standard, Normal - Last inspection: Continuous airworthiness, April 25, 2016 - Departed: JBR, Jonesboro, MO - Destination: Dexter, MO - Airport: DXE, Dexter Municipal Airport, runway 18, 5,000 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 44; injuries: none; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; seat: left; restraint: lap only; flight hours: 1,333 total, 16 in this make and model, 1,333 as pilot in command, 51 in the last 90 days, 19 in the last 30 days, 3 in the last 24 hours - Pilot; age 79; injuries: none; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; seat: right; restraint: lap only - Flight instructor; age 85; injuries: none; commercial, airline transport; airplane ratings: multi-engine land, single-engine sea, single-engine land; medical: class 2, with waivers/limitations; seat: center ## Weather - Conditions: Visual (VMC), Day - Wind: 210° at 12 knots - Visibility: 9 statute miles - Lowest ceiling: none - Temperature: 81 °F, dew point 68 °F - Observed at: POF, 18 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20160510023909A](https://openairdocs.org/incident/20160510023909A), May 10, 2016: Beech B100, Dexter, MO, Substantial damage. On may 10, 2016 at approximately 17:15 local time a twin turboprop king air landed with the right hand main landing gear collapsing upon touchdown. The… ## Docket (3 files) The files NTSB released with the investigation on November 16, 2017, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=93191. 906 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 - Pilot (item 1, .PDF, 598 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40458075&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1%20-%20Pilot-Master.PDF - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 - Flight Instructor (item 2, .PDF, 257 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40458076&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1%20-%20Flight%20Instructor-Master.PDF - FAA Inspector's Statement (item 3, .PDF, 52 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40458077&FileExtension=.PDF&FileName=FAA%20Inspector%27s%20Statement-Master.PDF From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.