# NTSB CEN11LA596: Suminski Walter M Jabiru SP, N284E, Columbia, IL, August 17, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: August 17, 2011, 17:45 local (22:45 UTC) - Place: Columbia, IL - Coordinates: 38.45222, -90.236114 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=38.4522&lon=-90.2361&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Part(s) separation from AC](https://openairdocs.org/ntsb-events/338) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report December 1, 2011 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA-St. Louis Flight Standards - NTSB case key (mKey): 81602 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN11LA596 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/81602/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=81602 - Page: https://openairdocs.org/ntsb/CEN11LA596 ## Probable cause Separation of the right main wheel during landing rollout for undetermined reasons. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: wheel/ski/float](https://openairdocs.org/ntsb-findings/01023246): Aircraft › Aircraft systems · Failure (probable cause); cases with it: [Suminski Walter M JABIRU SP, 1 case](https://openairdocs.org/ntsb-findings/01023246/cases.md?model=05610IK), [All aircraft, 48 cases](https://openairdocs.org/ntsb-findings/01023246/cases.md) - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Suminski Walter M JABIRU SP, 1 case](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=05610IK), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/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: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330); cases with it: [Suminski Walter M JABIRU SP, 1 case](https://openairdocs.org/ntsb-events/330/sequence.md?model=05610IK), [All aircraft, 994 cases](https://openairdocs.org/ntsb-events/330/sequence.md) - [Landing-landing roll: Part(s) separation from AC](https://openairdocs.org/ntsb-events/338) (defining event); cases with it: [Suminski Walter M JABIRU SP, 1 case](https://openairdocs.org/ntsb-events/338/sequence.md?model=05610IK), [All aircraft, 563 cases](https://openairdocs.org/ntsb-events/338/sequence.md) - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230); cases with it: [Suminski Walter M JABIRU SP, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=05610IK), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Suminski Walter M JABIRU SP, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=05610IK), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Suminski Walter M JABIRU SP, 1 case](https://openairdocs.org/ntsb-events/094/sequence.md?model=05610IK), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The pilot said that, during the landing rollout, the airplane veered to the right and exited the runway. The airplane subsequently encountered a berm and came to rest in an adjacent corn field. The airplane sustained substantial damage to the left wing and fuselage. A postaccident examination revealed that the right main landing gear wheel had separated from the airplane. The components that retained the main wheel had separated from the axle and were not recovered. Visual examination of the bolt attachment hole on the landing gear strut axle did not reveal any damage. The reason for the wheel separation could not be determined. ## Factual narrative On August 17, 2011, about 1745 central daylight time, a Suminski Jabiru SP airplane, N284E, was substantially damaged during a runway excursion on landing at Sackman Field Airport (H49), Columbia, Illinois. The pilot and flight instructor were not injured. The experimental amateur-built airplane was registered to and operated by the pilot. The instructional flight was being conducted under the provisions of 14 Code of Federal Regulations Part 91. Visual meteorological conditions prevailed for the flight, which was not operated on a flight plan. The local flight originated from H49 about 1630. The pilot reported that he was conducting proficiency work with a flight instructor at the time of the accident. He stated that on the third landing of the flight, after rolling out about 500 feet, the airplane veered to the right and departed the runway. It subsequently encountered a berm and came to rest in an adjacent corn field. The airplane sustained substantial damage to the left wing and fuselage. A postaccident examination revealed that the right main landing gear wheel had separated from the airplane. Further inspection noted that the components that retained the main wheel, the Extension Stub Axle and 3/16-inch bolt, had separated from the axle. These components were not recovered. Visual examination of the bolt attachment hole on the landing gear strut axle did not reveal any damage. ## Aircraft - Registration: [N284E](https://openairdocs.org/aircraft/N284E), registered now, S/N 284, built 2000 (OpenAirDocs) - Reported make and model: SUMINSKI WALTER M JABIRU SP - Registry model: [Suminski Walter M JABIRU SP](https://openairdocs.org/model/suminski-walter-m-jabiru-sp) (registry code 05610IK) (OpenAirDocs) - Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 284 - Airframe hours: 389 - Engines: Jabiru 2200A 80 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, February 21, 2011 - Departed: H49, Columbia, IL - Destination: H49, Columbia, IL - Airport: H49, Sackman Field, runway 21, 2,450 × 150 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 73; injuries: none; private; airplane ratings: single-engine land; medical: sport pilot, with waivers/limitations; last flight review June 1, 2011; seat: left; flight hours: 649 total, 4 in this make and model, 527 as pilot in command, 5 in the last 90 days, 3 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 150° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: 5,000 ft broken - Temperature: 86 °F, dew point 72 °F - Altimeter: 29.96 inHg - Observed at: CPS, 8 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 20110817017779A](https://openairdocs.org/incident/20110817017779A), Aug 17, 2011: Suminski Walter M JABIRU SP, Columbia, IL, Substantial damage. On 08/17/2011, NTSB investigator [privacy data omitted] was contacted by the owner of aircraft N284E, from (H49), Sackman Field in Columbia, IL. He was… ## Docket (5 files) The files NTSB released with the investigation on October 25, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=81602. 982 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 306 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40355520&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Conversation Record -- FAA Inspectors (item 2, .PDF, 48 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40355380&FileExtension=.PDF&FileName=Conversation%20Record%20--%20FAA%20Inspectors-Master.PDF - Accident Site Diagram (item 3, .PDF, 342 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40355584&FileExtension=.PDF&FileName=Accident%20Site%20Diagram-Master.PDF - Airplane Specifications (item 4, .PDF, 74 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40355382&FileExtension=.PDF&FileName=Airplane%20Specifications-Master.PDF - Service Manual -- Main Wheel Diagram (item 5, .PDF, 212 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40355741&FileExtension=.PDF&FileName=Service%20Manual%20--%20Main%20Wheel%20Diagram-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.