# Trailing edge flaps - Type: NTSB finding subsection - Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft structures](https://openairdocs.org/ntsb-findings/0103) › [Wing structure](https://openairdocs.org/ntsb-findings/010357) › Trailing edge flaps - NTSB code: 01035753 - Cases: 33 - In the probable cause: 28 - Fatal cases: 8 - All cases: https://openairdocs.org/ntsb-findings/01035753/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01035753/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/01035753 ## Cases per year (in the probable cause / all) - 2008: 1 / 1 - 2009: 1 / 2 - 2010: 1 / 2 - 2011: 4 / 6 - 2012: 5 / 5 - 2013: 1 / 1 - 2014: 2 / 3 - 2015: 2 / 2 - 2016: 3 / 3 - 2017: 1 / 1 - 2018: 3 / 3 - 2021: 1 / 1 - 2022: 1 / 1 - 2023: 2 / 2 ## Defining events in these cases - [Collision during takeoff/land](https://openairdocs.org/ntsb-events/490): 8 cases - [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 6 cases - [Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241): 5 cases - [Flight control sys malf/fail](https://openairdocs.org/ntsb-events/333): 3 cases - [Miscellaneous/other](https://openairdocs.org/ntsb-events/900): 2 cases - [Runway excursion](https://openairdocs.org/ntsb-events/300): 2 cases - [Loss of control on ground](https://openairdocs.org/ntsb-events/230): 2 cases - [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 1 cases - [Aircraft structural failure](https://openairdocs.org/ntsb-events/337): 1 cases - [Hard landing](https://openairdocs.org/ntsb-events/092): 1 cases ## Aircraft models (registry) - [Cirrus Design SR22](https://openairdocs.org/model/cirrus-design-sr22): 2 cases - [Cessna 172S](https://openairdocs.org/model/cessna-172s): 2 cases - [Cessna 172M](https://openairdocs.org/model/cessna-172m): 2 cases - [Air Tractor AT-502B](https://openairdocs.org/model/air-tractor-at-502b): 2 cases - [Piper PA-32R-300](https://openairdocs.org/model/piper-pa-32r-300): 1 cases - [Piper PA-28R-180](https://openairdocs.org/model/piper-pa-28r-180): 1 cases - [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140): 1 cases - [Piper PA-25-235](https://openairdocs.org/model/piper-pa-25-235): 1 cases - [Mooney M20L](https://openairdocs.org/model/mooney-m20l): 1 cases - [Mitsubishi MU-2B-60](https://openairdocs.org/model/mitsubishi-mu-2b-60): 1 cases ## Other findings in the same cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 9 cases - [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 7 cases - [Incorrect action performance](https://openairdocs.org/ntsb-findings/02041015) (Personnel issues): 7 cases - [Incorrect action selection](https://openairdocs.org/ntsb-findings/02041010) (Personnel issues): 7 cases - [Climb rate](https://openairdocs.org/ntsb-findings/01062035) (Aircraft): 5 cases - [Airspeed](https://openairdocs.org/ntsb-findings/01062010) (Aircraft): 5 cases - [Tree(s)](https://openairdocs.org/ntsb-findings/03022020) (Environmental issues): 4 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 4 cases - [Use of checklist](https://openairdocs.org/ntsb-findings/02063030) (Personnel issues): 3 cases - [Performance calculations](https://openairdocs.org/ntsb-findings/02061010) (Personnel issues): 3 cases ## Newest cases - [NTSB CEN23LA335](https://openairdocs.org/ntsb/CEN23LA335), Jul 28, 2023: Piper PA-25-235 (N7094Z), Tyler, MN, substantial damage. Probable cause: The pilot’s improper flap position during takeoff, which resulted in degraded climb performance and a collision with terrain. - [NTSB ERA23LA271](https://openairdocs.org/ntsb/ERA23LA271), Jun 18, 2023: Cessna 172 (N12395), Seymore, TN, substantial damage. Probable cause: The flight instructor’s failure to properly configure the wing flaps for a soft-field takeoff on a short runway, which resulted in a runway overrun and collision with trees. - [NTSB ERA22LA116](https://openairdocs.org/ntsb/ERA22LA116), Feb 5, 2022: Dehavilland DHC-2 (N1454Z), Gilbert, SC, substantial damage. Probable cause: The pilot’s improper flap setting, which resulted in a collision with trees during a takeoff attempt from a short grass field. - [NTSB CEN21FA199](https://openairdocs.org/ntsb/CEN21FA199), Apr 24, 2021: Cirrus Design SR22 (N587CD), Port Aransas, TX, destroyed, 1 fatal. Probable cause: The pilot’s failure to maintain adequate airspeed during the go-around, which resulted in the airplane exceeding its critical angle of attack and a subsequent aerodynamic stall. - [NTSB GAA19CA029](https://openairdocs.org/ntsb/GAA19CA029), Oct 18, 2018: Capital Holdings 226 CCX-2000 (N468LM), Dahlonga, GA, substantial damage. Probable cause: The pilot's improper landing flare, which resulted in a bounced landing and his subsequent failure to maintain directional control. Also causal to the accident was the pilot’s failure to retract the… - [NTSB GAA18CA575](https://openairdocs.org/ntsb/GAA18CA575), Sep 29, 2018: Piper PA28 (N40825), Spokane, WA, substantial damage. Probable cause: The pilot’s improper retraction of the flaps during a go-around, which resulted in the airplane’s failure to climb and its subsequent collision with trees. - [NTSB GAA18CA287](https://openairdocs.org/ntsb/GAA18CA287), May 19, 2018: Maule M 7 (N427LS), Burnet, TX, substantial damage. Probable cause: The pilot’s failure to maintain directional control during landing in gusting wind conditions and with an incorrect flap configuration. - [NTSB ERA17LA141](https://openairdocs.org/ntsb/ERA17LA141), Mar 29, 2017: Cessna R182 (N2383C), Mooresville, NC, substantial damage. Probable cause: The pilot's failure to properly configure the airplane's flaps for takeoff, which resulted in a longer ground roll and subsequent runway excursion. - [NTSB ERA16LA322](https://openairdocs.org/ntsb/ERA16LA322), Sep 23, 2016: Aero Vodochody L 39 (N139AJ), Norfolk, VA, substantial damage. Probable cause: An uncommanded flap retraction for reasons that could not be determined, as a postaccident examination of the flap system did not reveal evidence of any preaccident anomalies. - [NTSB CEN16LA342](https://openairdocs.org/ntsb/CEN16LA342), Aug 30, 2016: Fairchild M 62A-3 (N47164), Madison, OH, substantial damage. Probable cause: The pilot's failure to follow the Before Takeoff checklist and his improper use of flaps during takeoff, which degraded the airplane's climb performance and resulted in a collision with trees. 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.