# NTSB CEN22LA289: Glasair II FT, N350CP, Monee, IL, June 24, 2022 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Class 3 · Limited · Final report - Date: June 24, 2022, 15:18 local (20:18 UTC) - Place: Monee, IL - Coordinates: 41.36772, -87.72652 - Nearby events: https://openairdocs.org/map.md?lat=41.3677&lon=-87.7265&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Defining event: [Maneuvering: Loss of control in flight](https://openairdocs.org/ntsb-events/240) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed - Report: Approved by Office Director - Investigation class: Class 3 - NTSB office: Central Region - Parties: FAA Flight Standards - NTSB case key (mKey): 105358 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN22LA289 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/105358/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=105358 - Page: https://openairdocs.org/ntsb/CEN22LA289 ## Probable cause The pilot’s in-flight loss of control while practicing aerodynamic stall recoveries. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Patterson Charles E GLASAIR II FT, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=0560201), [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. - [Maneuvering: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241); cases with it: [Patterson Charles E GLASAIR II FT, 1 case](https://openairdocs.org/ntsb-events/241/sequence.md?model=0560201), [All aircraft, 1,529 cases](https://openairdocs.org/ntsb-events/241/sequence.md) - [Maneuvering: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [Patterson Charles E GLASAIR II FT, 1 case](https://openairdocs.org/ntsb-events/240/sequence.md?model=0560201), [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md) - [Uncontrolled descent: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Patterson Charles E GLASAIR II FT, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=0560201), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot was conducting power-off aerodynamic stall recoveries about 3,000 ft mean sea level (msl) at the time of the accident. The first three stall recoveries were unremarkable. However, before the fourth stall, the airplane’s deceleration rate and pitch attitude were greater than the previous three stall entries. The airplane snapped to the left and rolled inverted. It continued to roll and settled into an upright left spin with a relatively flat nose-down pitch attitude between 10° and 20°. Multiple attempts to recover from the spin were not successful. The airplane made about 6 complete rotations before it impacted the terrain. The airplane sustained substantial damage to both wings, the fuselage, and the empennage. The pilot reported no malfunctions or failures associated with the airplane before the accident. He noted that initiating recovery at the first indication of the stall might have prevented the loss of control. ## Factual narrative On June 24, 2022, about 1518 central daylight time, a Glasair II FT airplane, N350CP, was substantially damaged when it was involved in an accident near Monee, Illinois. The pilot was seriously injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot was conducting power-off aerodynamic stall recoveries about 3,000 ft msl. The pilot reported that the first three stall recoveries were unremarkable. However, before the fourth stall, the airplane’s deceleration rate and pitch attitude were greater than the previous three stall entries. The airplane snapped to the left and rolled inverted. It continued to roll and settled into an upright left spin with a relatively flat nose-down pitch attitude between 10° and 20°. Multiple attempts to recover from the spin were not successful. The airplane made about 6 complete rotations before it impacted the terrain. The airplane sustained substantial damage to both wings, the fuselage, and the empennage. The pilot reported no malfunctions or failures associated with the airplane before the accident. He noted that initiating recovery at the first indication of the stall might have prevented the loss of control. ## Aircraft - Registration: [N350CP](https://openairdocs.org/deregistered/N350CP-2024-04-08), registration cancelled 2024-04-08, S/N 1008, built 1997 (OpenAirDocs) - Reported make and model: Glasair II FT - Registry model: [Patterson Charles E GLASAIR II FT](https://openairdocs.org/model/patterson-charles-e-glasair-ii-ft) (registry code 0560201) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 1008 - Year built: 1997 - Airframe hours: 603 - Engines: Lycoming O-320 150 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, April 17, 2022, 6 hours before - Departed: IGQ, Lansing, IL - Destination: ICQ, Lansing, IL - Equipment: Handheld GPS, ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 64; injuries: serious; private; airplane ratings: single-engine land; medical: basicmed, with waivers/limitations; last flight review June 10, 2022; seat: left; restraint: 3-point; flight hours: 535 total, 500 in this make and model, 421 as pilot in command, 5 in the last 90 days, 2 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 100° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 88 °F, dew point 57 °F - Altimeter: 30.02 inHg - Observed at: KIGQ, 14 nm away - METAR: METAR KIGQ 242015Z AUTO 10006KT 10SM CLR 31/14 A3002 ## 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 20220624011319A](https://openairdocs.org/incident/20220624011319A), Jun 24, 2022: Patterson Charles E GLASAIR II FT, Monee, IL, Destroyed. On June 24, 2022, a 1997 Patterson charles glasair ii aircraft departed lansing municapal airport (kigq) at approximately 1505 CDT. ADS-B data from AVP-100… ## Docket (2 files) The files NTSB released with the investigation on August 30, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=105358. 17.8 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 17.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14259070&FileExtension=pdf&FileName=Accident%20Report%20--%20CEN22LA289_redacted-Rel.pdf - Accident photos (item 2, PDF, 2 pages, 552 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14259264&FileExtension=pdf&FileName=Accident%20Photos%20--%20CEN22LA289-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.