# NTSB CHI05LA171: Yonchak Skybolt, N112MK, El Dorado, KS, July 2, 2005 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: July 2, 2005, 10:40 local (15:40 UTC) - Place: El Dorado, KS - Coordinates: 37.820507, -96.849693 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=37.8205&lon=-96.8497&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 2 serious - Status: Completed, report July 31, 2006 - Report: Approved by Office Director - Parties: FAA - NTSB case key (mKey): 61981 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI05LA171 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/61981/pdf - Page: https://openairdocs.org/ntsb/CHI05LA171 ## Probable cause The pilot's failure to maintain airspeed while maneuvering in the traffic pattern which resulted in an inadvertent stall. A factor was the low altitude. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, approach - vfr pattern - base leg/base to final - airspeed - not maintained, pilot in command (cause) - stall - inadvertent, pilot in command - altitude - low (contributing factor) - In flight collision with terrain/water, descent - uncontrolled - terrain condition - ground ## Analysis The airplane was damaged when it stalled and impacted the ground during a circling maneuver for spacing while in the traffic pattern for landing. The pilot reported that he executed the turning maneuver to allow a slower airplane to clear the runway. He stated that the airplane stalled during the turn and subsequently impacted the ground in a flat attitude. The pilot reported no malfunctions of the airplane. ## Factual narrative On July 2, 2005, about 1040 central daylight time, an amateur-built Yonchak Skybolt, sustained substantial damage when it impacted the ground near the Captain Jack Thomas/El Dorado Airport (EQA), El Dorado, Kansas. The airplane was approaching to land on runway 15 (4,200 feet by 75 feet, concrete) at EQA when the accident occurred. The pilot and passenger received serious injuries. The 14 CFR Part 91 personal flight was operating in visual meteorological conditions without a flight plan. The local flight originated about 1020. In a written report, the pilot stated, "I attempted a circle to land maneuver on the approach end of runway [15] at EQA to allow a slower aircraft ahead of me to clear the runway. As I circled to the left and about half way through my turn, the airplane stalled. I opened the throttle and used right rudder to lift the left wing level. Just before impact I cut the throttle to idle and pulled full aft on the stick [control]. The airplane impacted in a flat plane or 'pancake'." The pilot listed no mechanical problems with the airplane. ## Aircraft - Registration: [N112MK](https://openairdocs.org/deregistered/N112MK-2013-02-21), registration cancelled 2013-02-21, S/N 19442, built 1993 (OpenAirDocs) - Reported make and model: Yonchak Skybolt - Registry model: [Yonchak Mark Anthony SKYBOLT](https://openairdocs.org/model/yonchak-mark-anthony-skybolt) (registry code 056558J) (OpenAirDocs) - Registry engine: [Lycoming I0360 SER A&C](https://openairdocs.org/engine/lycoming-i0360-ser-a-c) (registry code 41511, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 19442 - Airframe hours: 300 - Engines: Lycoming O-360 200 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, February 1, 2005, 20 hours before - Departed: EQA, El Dorado, KS - Destination: EQA, EL DORADO, KS - Airport: EQA, Captain Jack Thomas/El Dorado, runway 15, 4,200 × 75 ft, concrete ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 60; injuries: serious; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review December 1, 2004; seat: rear; flight hours: 2,350 total, 208 in this make and model, 35 in the last 90 days, 10 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 170° at 11 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 75 °F, dew point 64 °F - Altimeter: 29.93 inHg - Observed at: AAO, 19 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 20050702016889A](https://openairdocs.org/incident/20050702016889A), Jul 2, 2005: Amtr SKYBOLT, El Dorado, KS, Substantial damage. (-23) The aircraft was on final approach to the El Dorado airport (keqa), Kansas with two occupants on board. Traffic taxied onto runway and the mishap pilot… 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.