# NTSB WPR21LA261: Beech 95-A55, N764SU, North Las Vegas, NV, June 29, 2021 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: June 29, 2021, 08:20 local (15:20 UTC) - Place: North Las Vegas, NV - Coordinates: 36.210109, -115.19467 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=36.2101&lon=-115.1947&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 103428 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR21LA261 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/103428/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=103428 - Page: https://openairdocs.org/ntsb/WPR21LA261 ## Probable cause The pilot’s inability to maintain directional control during landing roll due to a flat tire. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: tire casing](https://openairdocs.org/ntsb-findings/01023244): Aircraft › Aircraft systems · Failure (probable cause); cases with it: [Beech 95-A55, 1 case](https://openairdocs.org/ntsb-findings/01023244/cases.md?model=1152704), [All aircraft, 36 cases](https://openairdocs.org/ntsb-findings/01023244/cases.md) - [Use of equip/info: use of equip/system](https://openairdocs.org/ntsb-findings/02063015): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Beech 95-A55, 1 case](https://openairdocs.org/ntsb-findings/02063015/cases.md?model=1152704), [All aircraft, 1,391 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md) - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Beech 95-A55, 4 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=1152704), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Beech 95-A55, 7 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=1152704), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) (defining event); cases with it: [Beech 95-A55, 1 case](https://openairdocs.org/ntsb-events/094/sequence.md?model=1152704), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Beech 95-A55, 2 cases](https://openairdocs.org/ntsb-events/300/sequence.md?model=1152704), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Beech 95-A55, 6 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=1152704), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The flight instructor of the multi-engine, retractable landing gear airplane reported that, shortly after touchdown, with the pilot receiving instruction at the flight controls, the pilot was simulating max braking, the airplane began to veer left. He announced, “easy on brakes and back on center line.” The airplane continued to veer left, he started to apply right pressure and stated, “my controls off off off.” He heard a sound similar to a flat tire, the left main landing gear collapsed, and the airplane exited the left side of the runway. The pilot receiving instruction reported that when the airplane touched down, it immediately began to veer left. Despite multiple control inputs, the airplane continued to veer left. The flight instructor assumed the flight controls and continued to apply max right rudder. The left main landing gear began to chatter, then collapsed, and the airplane exited the left side of the runway. Postaccident examination of the airplane revealed that a large flat spot on the left main tire casing along with a large hole in the tire and tube. The left main landing gear actuator arm was found bent. It’s likely that during the landing roll, as a result of a side load imposed on the left main landing gear, the landing gear actuator arm was able to bend, which allowed for the landing gear to become unlocked and subsequently collapse. The airplane sustained substantial damage to the left aileron and left wing. The flight instructor and pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation, other than the flat tire. ## Aircraft - Registration: [N764SU](https://openairdocs.org/deregistered/N764SU-2022-12-31), registration cancelled 2022-12-31, S/N TC-356, built 1962 (OpenAirDocs) - Reported make and model: BEECH 95-A55 - Registry model: [Beech 95-A55](https://openairdocs.org/model/beech-95-a55) (registry code 1152704) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: TC-356 - Year built: 1962 - Airframe hours: 1198.7 - Engines: Continental Motors IO-470 260 horsepower reciprocating; Continental Motors IO-470 260 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Ace Of Spades Aviation LLC - Registered owner: Ace Of Spades Aviation LLC - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, May 9, 2021, 30.5 hours before - Destination: Same as departure - Airport: VGT, North Las Vegas, runway 12R, 5,001 × 75 ft, asphalt - Equipment: Stall warning system, Auto-pilot, ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 34; injuries: none; flight instructor, commercial; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review August 13, 2020; seat: left; restraint: none; flight hours: 1,286 total, 2 in this make and model, 1,176 as pilot in command, 115 in the last 90 days, 32 in the last 30 days, 4 in the last 24 hours - Pilot; age 32; injuries: none; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review August 28, 2020; seat: left; restraint: 3-point; flight hours: 331 total, 11 in this make and model, 266 as pilot in command, 17 in the last 90 days, 12 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 93 °F, dew point 43 °F - Altimeter: 29.80 inHg - Observed at: KVGT - METAR: KVGT 291453Z 00000KT 10SM CLR 34/06 A2980 RMK AO2 SLP073 T03440061 53015 $ ## 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 20210629012479A](https://openairdocs.org/incident/20210629012479A), Jun 29, 2021: Beech 95-A55, Vgt, NV, Substantial damage. At touchdown, the student pilot applied excessive left brake pressure causing the aircraft to skid to the left. Exiting the runway causing the left gear to… ## Docket (5 files) The files NTSB released with the investigation on August 20, 2021, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=103428. 16.7 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 - flight instructor (item 1, PDF, 11 pages, 15.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12574176&FileExtension=pdf&FileName=6120%20cfi_Redacted-Rel.pdf - Statement from the pilot receiving instruction (item 2, PDF, 1 page, 46 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12574224&FileExtension=pdf&FileName=Statement%20from%20the%20Pilot%20Receiving%20Instruction-Rel.pdf - Email from pilot receiving instruction (item 3, PDF, 1 page, 135 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12573745&FileExtension=pdf&FileName=Pilot%20Receiving%20Instruction%20Email_Redacted-Rel.pdf - Mechanic statement (item 4, PDF, 1 page, 141 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12587191&FileExtension=pdf&FileName=mechanic%20statement_Redacted-Rel.pdf - Photo array (item 5, PDF, 4 pages, 4 photos, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12574442&FileExtension=pdf&FileName=Photo%201-Rel.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.