# NTSB CEN10CA258: Calcote Clarence E Glasair RG, N236CC, Lee's Summit, MO, May 18, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 18, 2010, 12:00 local (17:00 UTC) - Place: Lee's Summit, MO - Coordinates: 38.955001, -94.373336 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=38.9550&lon=-94.3733&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing: Landing gear not configured](https://openairdocs.org/ntsb-events/095) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report July 22, 2010 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA Kansas City FSDO - NTSB case key (mKey): 76042 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN10CA258 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/76042/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=76042 - Page: https://openairdocs.org/ntsb/CEN10CA258 ## Probable cause The failure of the landing gear to fully extend and lock in the down position for unknown reasons. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230): Aircraft › Aircraft systems · Malfunction (probable cause); cases with it: [Calcote Clarence E GLASAIR RG, 1 case](https://openairdocs.org/ntsb-findings/01023230/cases.md?model=05655SD), [All aircraft, 416 cases](https://openairdocs.org/ntsb-findings/01023230/cases.md) - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Calcote Clarence E GLASAIR RG, 1 case](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=05655SD), [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 gear not configured](https://openairdocs.org/ntsb-events/095) (defining event); cases with it: [Calcote Clarence E GLASAIR RG, 1 case](https://openairdocs.org/ntsb-events/095/sequence.md?model=05655SD), [All aircraft, 584 cases](https://openairdocs.org/ntsb-events/095/sequence.md) - [Landing-flare/touchdown: Abnormal runway contact](https://openairdocs.org/ntsb-events/090); cases with it: [Calcote Clarence E GLASAIR RG, 1 case](https://openairdocs.org/ntsb-events/090/sequence.md?model=05655SD), [All aircraft, 1,506 cases](https://openairdocs.org/ntsb-events/090/sequence.md) - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Calcote Clarence E GLASAIR RG, 1 case](https://openairdocs.org/ntsb-events/094/sequence.md?model=05655SD), [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: [Calcote Clarence E GLASAIR RG, 1 case](https://openairdocs.org/ntsb-events/300/sequence.md?model=05655SD), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) - [Post-impact: Cabin safety event](https://openairdocs.org/ntsb-events/110); cases with it: [Calcote Clarence E GLASAIR RG, 1 case](https://openairdocs.org/ntsb-events/110/sequence.md?model=05655SD), [All aircraft, 151 cases](https://openairdocs.org/ntsb-events/110/sequence.md) ## Analysis The pilot was returning for landing at the non-towered airport after a local flight. The pilot said he had an electrical problem during the arrival and the landing gear failed to extend. The pilot then used the "override valve" to attempt to manually extend the gear. On touchdown the landing gear was not extended and the wings contacted the concrete pavement. There was substantial damage to both wings, one wingtip, and the airplane's engine mounts. The fuel tanks ruptured and there was a significant fuel spill but no post-impact fire. The solo pilot was not injured. The FAA inspector that responded to the scene observed the recovery of the airplane. With the airplane suspended on a hoist, the landing gear extended and retracted normally using airplane's battery power; and extended normally and locked into place using only the landing gear bypass valve. ## Factual narrative The pilot was returning for landing at the non-towered airport after a local flight. The pilot said he had an electrical problem during the arrival and the landing gear failed to extend. The pilot then used the "override valve" to attempt to manually extend the gear. On touchdown the landing gear was not extended and the wings contacted the concrete pavement. There was substantial damage to both wings, one wingtip, and the airplane's engine mounts. The fuel tanks ruptured and there was a significant fuel spill but no post-impact fire. The solo pilot was not injured. The FAA inspector that responded to the scene observed the recovery of the airplane. With the airplane suspended on a hoist, the landing gear extended and retracted normally using airplane's battery power; and extended normally and locked into place using only the landing gear bypass valve. ## Aircraft - Registration: [N236CC](https://openairdocs.org/aircraft/N236CC), registered now, S/N 295, built 1984 (OpenAirDocs) - Reported make and model: CALCOTE CLARENCE E Glasair RG - Registry model: [Calcote Clarence E GLASAIR RG](https://openairdocs.org/model/calcote-clarence-e-glasair-rg) (registry code 05655SD) (OpenAirDocs) - Registry engine: [Lycoming IO-320 series](https://openairdocs.org/engine/lycoming-io-320-series) (registry code 41509, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 295 - Airframe hours: 955 - Engines: Penn-Yan XE320 185 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, January 18, 2010, 3 hours before - Departed: LXT, Lee's Summit, MO - Destination: LXT, Lee's Summit, MO - Airport: LXT, Lee's Summit Municipal Airport, runway 36 ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 62; injuries: none; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, with waivers/limitations; last flight review March 2, 2009; seat: left; flight hours: 1,193 total, 283 in this make and model, 1,133 as pilot in command, 4 in the last 90 days, 2 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 300° at 8 knots - Visibility: 10 statute miles - Temperature: 162 °F - Observed at: LXT ## 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 20100518034589A](https://openairdocs.org/incident/20100518034589A), May 18, 2010: Calcote Cla GLASAIR RG, Lee'S Summit, MO, Substantial damage. The pilot stated that he lost electrical power and attempted to manually extend the landing gear by opening the bypass valve and placing the landing gear… ## Docket (1 files) The files NTSB released with the investigation on June 25, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=76042. 779 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 779 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40330511&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.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.