# Drag control system - Type: NTSB finding subsection - Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft systems](https://openairdocs.org/ntsb-findings/0102) › [Flight control system](https://openairdocs.org/ntsb-findings/010227) › Drag control system - NTSB code: 01022760 - Cases: 10 - In the probable cause: 10 - Fatal cases: 2 - All cases: https://openairdocs.org/ntsb-findings/01022760/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01022760/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/01022760 ## Cases per year (in the probable cause / all) - 2008: 2 / 2 - 2010: 1 / 1 - 2011: 1 / 1 - 2012: 1 / 1 - 2013: 2 / 2 - 2021: 2 / 2 - 2025: 1 / 1 ## Defining events in these cases - [Miscellaneous/other](https://openairdocs.org/ntsb-events/900): 2 cases - [Landing area overshoot](https://openairdocs.org/ntsb-events/380): 2 cases - [Landing area undershoot](https://openairdocs.org/ntsb-events/370): 2 cases - [Runway excursion](https://openairdocs.org/ntsb-events/300): 2 cases - [Loss of lift](https://openairdocs.org/ntsb-events/500): 1 cases - [Collision during takeoff/land](https://openairdocs.org/ntsb-events/490): 1 cases ## Aircraft models (registry) - [Dassault/Sud FAN JET FALCON](https://openairdocs.org/model/dassault-sud-fan-jet-falcon): 2 cases - [Schweizer SGS 2-33A](https://openairdocs.org/model/schweizer-sgs-2-33a): 1 cases - [Israel Aerospace Industriesltd GULFSTREAM G150](https://openairdocs.org/model/israel-aerospace-industriesltd-gulfstream-g150): 1 cases - [Grob-Werke TWIN ASTIR](https://openairdocs.org/model/grob-werke-twin-astir): 1 cases - [Boeing 757-223](https://openairdocs.org/model/boeing-757-223): 1 cases - [Boeing 737-7Q8](https://openairdocs.org/model/boeing-737-7q8): 1 cases - [Let L-23 SUPER BLANIK](https://openairdocs.org/model/let-l-23-super-blanik): 1 cases - [AMS Flight APIS-M (MOTORGLIDER)](https://openairdocs.org/model/ams-flight-apis-m-motorglider): 1 cases - [Schleicher Alexander ASH 26 E](https://openairdocs.org/model/schleicher-alexander-ash-26-e): 1 cases ## Other findings in the same cases - [Descent/approach/glide path](https://openairdocs.org/ntsb-findings/01062040) (Aircraft): 5 cases - [Incorrect action performance](https://openairdocs.org/ntsb-findings/02041015) (Personnel issues): 4 cases - [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 3 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 3 cases - [Tree(s)](https://openairdocs.org/ntsb-findings/03022020) (Environmental issues): 2 cases - [Identification/recognition](https://openairdocs.org/ntsb-findings/02041510) (Personnel issues): 2 cases - [Monitoring equip/instruments](https://openairdocs.org/ntsb-findings/02021525) (Personnel issues): 2 cases - [Altitude](https://openairdocs.org/ntsb-findings/01062012) (Aircraft): 2 cases - [Thrust reverser](https://openairdocs.org/ntsb-findings/01057830) (Aircraft): 2 cases - [Safety programs, general](https://openairdocs.org/ntsb-findings/04035000) (Organizational issues): 1 cases ## Newest cases - [NTSB ERA25LA287](https://openairdocs.org/ntsb/ERA25LA287), Jul 24, 2025: Grob-Werke Twin Astir (N103GV), Franconia, NH, substantial damage. Probable cause: The pilot’s failure to detect the inadvertent deployment of the spoilers, which resulted in a prolonged, excessive descent rate. Contributing to the accident was the pilot’s decision to conduct a… - [NTSB ERA22FA004](https://openairdocs.org/ntsb/ERA22FA004), Oct 5, 2021: Dassault Falcon 20 (N283SA), Thomson, GA, destroyed, 2 fatal. Probable cause: The flight crew’s continuation of an unstable dark night visual approach and the captain’s instruction to use air brakes during the approach contrary to airplane operating limitations, which resulted… - [NTSB ERA21LA208](https://openairdocs.org/ntsb/ERA21LA208), May 5, 2021: Israel Aerospace Industries Gulfstream G150 (N22ST), Ridgeland, SC, substantial damage. Probable cause: The flight crew’s continuation of an unstable approach and the failure of the ground air brakes to deploy upon touchdown, both of which resulted in the runway overrun. Contributing was the crew’s… - [NTSB ERA13CA352](https://openairdocs.org/ntsb/ERA13CA352), Aug 4, 2013: Schweizer SGS 2-33A (N1211S), Erwinna, PA, substantial damage. Probable cause: The student pilot's improper altitude and energy management in the landing pattern which resulted in the glider impacting a tree and landing short of the runway. - [NTSB ERA13CA310](https://openairdocs.org/ntsb/ERA13CA310), Apr 12, 2013: Schleicher Alexander ASH 26 E (N26EL), Tullahoma, TN, substantial damage. Probable cause: The pilot's improper use of wing spoilers during approach resulting in an altitude loss and collision with a tree. - [NTSB ERA12CA454](https://openairdocs.org/ntsb/ERA12CA454), Jun 28, 2012: Let L-23 Super Blanik (N273BA), Benton, TN, substantial damage. Probable cause: The pilot's inadvertent extension of the wing airbrakes, which resulted in a loss of lift and subsequent landing prior to the runway. - [NTSB DCA11IA047](https://openairdocs.org/ntsb/DCA11IA047), Apr 26, 2011: Boeing 737-7Q8 (N799SW), Chicago, IL, incident, minor damage. Probable cause: The flight crew's delayed deployment of the speedbrakes and thrust reversers, resulting in insufficient runway remaining to bring the airplane to a stop. Contributing to the delay in deployment of… - [NTSB DCA11IA015](https://openairdocs.org/ntsb/DCA11IA015), Dec 29, 2010: Boeing 757-223 (N668AA), Jackson Hole, WY, incident, no damage. Probable cause: a manufacturing defect in a clutch mechanism that prevented the speedbrakes from automatically deploying after touchdown, and the captain’s failure to monitor and extend the speedbrakes manually.… - [NTSB ERA09LA282](https://openairdocs.org/ntsb/ERA09LA282), Dec 21, 2008: Dassault/Sud FAN JET (N165TW), Jamestown, NY, substantial damage. Probable cause: The inability to stop the airplane on the remaining runway because of icy runway conditions. A factor was the failure of the drag chute to properly deploy. - [NTSB MIA08LA131](https://openairdocs.org/ntsb/MIA08LA131), Jun 28, 2008: AMS Flight APIS-M (N1870R), Modena, NY, substantial damage, 1 fatal. Probable cause: The pilot's improper use of wing spoilers on final approach and his misjudged distance/altitude resulting in the glider colliding with trees short of the runway. NTSB has coded findings and defining events since 2008; earlier cases used its older occurrence and cause codes and aren't counted. Findings: https://openairdocs.org/ntsb-findings.md. Defining events: https://openairdocs.org/ntsb-events.md. Phases of flight: https://openairdocs.org/ntsb-phases.md. Every investigation, filtered by finding, event, phase, state, year or model: https://openairdocs.org/ntsb.md (for example ?state=MI&fatal=1). NTSB's definitions: Accident and incident, 49 CFR 830.2 (https://www.ecfr.gov/current/title-49/subtitle-B/chapter-VIII/part-830/subpart-A/section-830.2), CICTT occurrence categories (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/OccurrenceCategoryDefinitions.pdf), CICTT phases of flight (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/PhaseofFlightDefinitions.pdf), and NTSB coding manual, before 2008 (PDF) (https://www.ntsb.gov/GILS/Documents/codman.pdf). NTSB publishes no definitions for its findings, only their names. --- 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.