# NTSB WPR11CA433: Sherman Craig W Glasair III, N17S, Kanab, UT, September 3, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 3, 2011, 13:00 local (19:00 UTC) - Place: Kanab, UT - Coordinates: 37.006389, -112.525276 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=37.0064&lon=-112.5253&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report November 22, 2011 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 81716 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR11CA433 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/81716/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=81716 - Page: https://openairdocs.org/ntsb/WPR11CA433 ## Probable cause The pilot’s failure to maintain directional control during the landing roll, as a result of a flat left main landing gear tire. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Attain/maintain not possible (probable cause); cases with it: [Sherman Craig W GLASAIR III, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=056056N), [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: [Sherman Craig W GLASAIR III, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=056056N), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Landing gear system: tube](https://openairdocs.org/ntsb-findings/01023245): Aircraft › Aircraft systems · Failure (probable cause); cases with it: [Sherman Craig W GLASAIR III, 1 case](https://openairdocs.org/ntsb-findings/01023245/cases.md?model=056056N), [All aircraft, 19 cases](https://openairdocs.org/ntsb-findings/01023245/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: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Sherman Craig W GLASAIR III, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=056056N), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Sherman Craig W GLASAIR III, 1 case](https://openairdocs.org/ntsb-events/300/sequence.md?model=056056N), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) ## Analysis According to the pilot, when the airplane touched down on the runway, he felt a vibration followed by the airplane pulling to the left. The pilot added right brake in attempt to realign the airplane; however, it continued to the left and exited the left side of the runway. The airplane traversed over the gravel adjacent to the runway and into brush, where it came to rest. A postaccident examination of the airplane revealed that the airplane’s left main landing gear tire was flat. No other anomalies were noted that would have precluded normal flight. ## Factual narrative The pilot reported that when the airplane touched down on the runway he felt a vibration followed by the airplane pulling to the left. The pilot added right brake in attempt to realign the airplane; however, it continued to the left and exited the left side of the runway. The airplane traversed over the gravel adjacent to the runway and into brush, where it came to rest. Post accident examination of the airplane by a Federal Aviation Administration inspector revealed that the airplane’s left main landing gear tire was flat. No other anomalies were noted that would have precluded normal flight. ## Aircraft - Registration: [N17S](https://openairdocs.org/aircraft/N17S), registered now, S/N 3246, built 1998 (OpenAirDocs) - Reported make and model: SHERMAN CRAIG W GLASAIR III - Registry model: [Sherman Craig W GLASAIR III](https://openairdocs.org/model/sherman-craig-w-glasair-iii) (registry code 056056N) (OpenAirDocs) - Registry engine: [Lycoming IO-540 series](https://openairdocs.org/engine/lycoming-io-540-series) (registry code 41530, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 3246 - Airframe hours: 543 - Engines: LYCOMING IO-540 SER 300 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Hutter Robert A - Registered owner: Hutter Robert A - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, August 3, 2011 - Departed: 00C, Durango, CO - Destination: KNB, Kanab, UT - Airport: KNB, Kanab Municipal Airport, runway 01, 6,193 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 55; injuries: none; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, with waivers/limitations; last flight review September 29, 2010; seat: left; flight hours: 2,222 total, 117 in this make and model, 18 in the last 90 days, 6 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Visibility: 6 statute miles - Lowest ceiling: none - Temperature: 70 °F, dew point 25 °F - Altimeter: 30.31 inHg - Observed at: KNB ## 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 20110903019789A](https://openairdocs.org/incident/20110903019789A), Sep 3, 2011: Sherman Craig W GLASAIR III, Kanab, UT, Substantial damage. On approach to Kanab, runway one, when the pilot touched down he noticed a vibration and the aircraft veered to the left. The aircraft left the runway and came… ## Docket (2 files) The files NTSB released with the investigation on October 4, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=81716. 496 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 442 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40353682&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Record of Conversation - FAA Inspector (item 2, .PDF, 55 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40355151&FileExtension=.PDF&FileName=Record%20of%20Conversation%20-%20FAA%20Inspector-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.