# NTSB investigations: Propeller system NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. Page 1 of 4 · 177 cases ## Latest cases - [NTSB ERA25LA236](https://openairdocs.org/ntsb/ERA25LA236.md): Sting Sport TL-2000 · Dunavant, VA · Accident · No injuries · Class 4 · Limited · Final report · Jun 20, 2025 · N878N · Substantial damage > The inflight failure of the propeller due to its exceedance of the manufacturer’s overhaul requirement. - [NTSB ANC25LA028](https://openairdocs.org/ntsb/ANC25LA028.md): Piper PA-28-140 · Royal Kunia, HI · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 27, 2025 · N261FC · Substantial damage > Improper alteration of the crankshaft propeller flange at an unknown time, which resulted in an in-flight separation of the propeller assembly. - [NTSB CEN25LA117](https://openairdocs.org/ntsb/CEN25LA117.md): Vans RV-7A · Plainview, TX · Accident · No injuries · Class 3 · Limited · Final report · Mar 10, 2025 · N923ZA · Substantial damage > The improper machining of the propeller blade bearing seat, which resulted in an inflight propeller blade fatigue failure. Contributing to the accident was the improper machining of the propeller hub and propeller blade root and machining surface quality… - [NTSB WPR25LA096](https://openairdocs.org/ntsb/WPR25LA096.md): Cessna 150J · Minersville, UT · Accident · No injuries · Class 3 · Limited · Final report · Feb 16, 2025 · N151GW · Substantial damage > The failure of the propeller blade due to fatigue that originated from an impact pit sustained at an unknown time. Contributing to the accident was the failure of unknown maintenance personnel to detect and repair the impact pit before painting the propeller,… - [NTSB CEN25LA007](https://openairdocs.org/ntsb/CEN25LA007.md): Mooney M20E · Richmond, TX · Accident · No injuries · Class 3 · Limited · Final report · Oct 8, 2024 · N9151V · Substantial damage > The partial separation of a portion of the propeller spinner and its mounting bulkhead along with the upper cowl fairing while in a full-power climb. - [NTSB ERA24LA332](https://openairdocs.org/ntsb/ERA24LA332.md): Bucker Jungmann C.A.S.A. 1.131 · Red Hook, NY · Accident · No injuries · Class 4 · Limited · Final report · Jul 28, 2024 · N1041U · 2 aircraft · Substantial damage > The Great Lakes pilot's failure to maintain adequate clearance from the Bucker Jungmann while maneuvering during an air show, which resulted in a midair collision, the inability of the Bucker Jungmann to maintain altitude, and its subsequent forced landing. - [NTSB WPR24LA260](https://openairdocs.org/ntsb/WPR24LA260.md): Kitfox Series V · La Grande, OR · Accident · No injuries · Class 3 · Limited · Final report · Jul 23, 2024 · N53562 · Substantial damage > Separation of the propeller blades from progressive damage at the blade roots due to overtightening of the hub bolts. - [NTSB ERA24FA310](https://openairdocs.org/ntsb/ERA24FA310.md): Williams John Titan T-51 Mustang · Geneva, OH · Accident · 1 fatal · Class 3 · Field · Final report · Jul 21, 2024 · N751TX · Substantial damage > A sudden propeller overspeed and subsequent separation of the propeller blades and hub, while maneuvering at high speed and at low altitude, which resulted in a collision with a tree during the subsequent forced landing attempt. - [NTSB ANC24LA064](https://openairdocs.org/ntsb/ANC24LA064.md): Dehavilland DHC-2T · Petersville, AK · Accident · No injuries · Class 3 · Limited · Final report · Jul 13, 2024 · N535KT · Substantial damage > An in-flight loss of thrust due to an uncommanded feathering of the propeller for reasons that could not be determined. - [NTSB ERA24LA303](https://openairdocs.org/ntsb/ERA24LA303.md): Jones LONG-EZ · Thomasville, GA · Accident · No injuries · Class 3 · Limited · Final report · Jul 10, 2024 · N4JZ · Substantial damage > The pilot reported that he was maneuvering around weather at 11,500 ft mean sea level (msl) when he made a rapid descent to 3,500 ft msl to remain clear of clouds. He reported that he did not exceed the airplane’s maneuvering speed during the descent, and… - [NTSB ERA24LA223](https://openairdocs.org/ntsb/ERA24LA223.md): Beechcraft TC-12B · Lehigh Acres, FL · Accident · No injuries · Class 3 · Limited · Final report · May 20, 2024 · N762MC · Substantial damage > The asymmetric reverse thrust during the landing roll for reasons that could not be determined, resulting in the flightcrew’s inability to maintain directional control and a subsequent runway excursion. - [NTSB ERA24LA208](https://openairdocs.org/ntsb/ERA24LA208.md): Admore International Jets Aircam · DeLand, FL · Accident · Serious injuries · Class 3 · Limited · Final report · May 2, 2024 · N848HP · Substantial damage > The uncommanded movement of the left propeller into reverse during approach for undetermined reasons, resulting in an in-flight loss of control of the airplane at low altitude during approach. - [NTSB CEN24LA187](https://openairdocs.org/ntsb/CEN24LA187.md): Aviat A1 · Poole, NE · Accident · Serious injuries · Class 4 · Limited · Final report · Feb 11, 2024 · N122HU · Substantial damage > The non-certificated pilot’s failure to configure the airplane for takeoff, which resulted in a runway excursion. - [NTSB WPR24FA053](https://openairdocs.org/ntsb/WPR24FA053.md): Beauchamp Norm Kitfox · Eloy, AZ · Accident · 1 fatal · Class 3 · Field · Final report · Dec 8, 2023 · N66180 · Destroyed > The separation of a propeller blade during the initial climb due to insufficient blade retention forces. Contributing to the accident was the propeller blade retention design, manufacturing defects that prevented the propeller from achieving adequate grip… - [NTSB CEN24LA061](https://openairdocs.org/ntsb/CEN24LA061.md): Cessna 421C · McGregor, TX · Accident · No injuries · Class 3 · Limited · Final report · Dec 8, 2023 · N146TJ · Substantial damage > The failure of the spring pin in the right propeller governor, which precluded the pilot from controlling the propeller pitch to maintain engine rpm, resulting in a loss of engine thrust, excessive drag, and the subsequent forced landing to a field. - [NTSB CEN24LA038](https://openairdocs.org/ntsb/CEN24LA038.md): Bede BD-4 · Lowell, IN · Accident · Minor injuries · Class 3 · Limited · Final report · Nov 14, 2023 · N931AS · Substantial damage > Fatigue cracking of the propeller blade root, which resulted in the in-flight separation of the propeller blade from its root. Contributing to the accident was the improper machining of the blade root threads, which resulted in chatter/ratchet marks that… - [NTSB DCA23LA397](https://openairdocs.org/ntsb/DCA23LA397.md): Supernal SUP83-1 · California City, CA · Accident · No injuries · Class 4 · Limited · Final report · Aug 3, 2023 · N183TD · Substantial damage > A loss of control in flight due to a loss of electrical power to one of the lift-motors. - [NTSB WPR23LA283](https://openairdocs.org/ntsb/WPR23LA283.md): Beech C35 · Rock Springs, WY · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 20, 2023 · N620D · Substantial damage > Maintenance personnel’s failure to properly secure the propeller pitch control rod castellated nut hardware, which resulted in an in-flight failure of the pitch control bearing and subsequent loss of engine RPM and thrust. - [NTSB ERA23LA279](https://openairdocs.org/ntsb/ERA23LA279.md): Edmisten Robert Eugene SR Rans S-14 Airaile · Bonaire, GA · Accident · Serious injuries · Class 4 · Limited · Final report · Jun 25, 2023 · N528RE · Substantial damage > The pilot’s failure to properly adjust the propeller’s pitch angle, which resulted in a loss of thrust and an inability to maintain altitude. - [NTSB ERA23FA274](https://openairdocs.org/ntsb/ERA23FA274.md): Piper PA-30 · Claxton, GA · Accident · 3 fatal · Class 3 · Field · Final report · Jun 25, 2023 · N7240Y · Substantial damage > The flight crew’s improper fuel management, which resulted in the airplane’s right engine being starved of fuel and its subsequent total loss of power. - [NTSB CEN23LA218](https://openairdocs.org/ntsb/CEN23LA218.md): Piper J3C · Romeoville, IL · Incident · No injuries · Class 3 · Limited · Final report · Apr 27, 2023 · N6384H · Minor damage > The inflight failure of the propeller blade due to fatigue cracking from corrosion pits, initiating at the midpoint of the cambered face. - [NTSB WPR23LA149](https://openairdocs.org/ntsb/WPR23LA149.md): Stevens Kelly C RV-7 · Morgan, UT · Accident · No injuries · Class 3 · Limited · Final report · Apr 9, 2023 · N17NK · Substantial damage > The pilot/builder improperly torqued the propeller attachment bolts while reinstalling the propeller, which resulted in the fatigue failure of the bolts and the separation of the propeller assembly. - [NTSB ERA22FA387](https://openairdocs.org/ntsb/ERA22FA387.md): Sea & Sky Krucker Cygnet · Emily, MN · Accident · 2 fatal · Class 3 · Field · Final report · Aug 28, 2022 · N505DB · Substantial damage > The pilot’s operation of the weight-shift control aircraft over its design gross weight and his decision to take off with the engine operating at less than the specified takeoff rpm, which resulted in degraded takeoff and climb performance. Contributing to… - [NTSB CEN22LA250](https://openairdocs.org/ntsb/CEN22LA250.md): Beech 58 · Evansville, IN · Incident · No injuries · Class 3 · Limited · Final report · Jun 8, 2022 · N78KL · Minor damage > The failure of the propeller blade due to high-cycle fatigue that originated from damage that occurred at an unknown time. Contributing to the accident was the failure to identify the damage before the accident flight. - [NTSB ERA22LA237](https://openairdocs.org/ntsb/ERA22LA237.md): Diamond DA42 · Lehighton, PA · Accident · Minor injuries · Class 3 · Limited · Final report · May 9, 2022 · N988JA · Substantial damage > The flight instructor’s inadequate supervision of the flight and his failure to secure the right engine following an unsuccessful engine restart attempt, which resulted in the airplane’s inability to maintain altitude and a subsequent off-airport landing. - [NTSB WPR22LA114](https://openairdocs.org/ntsb/WPR22LA114.md): Cessna 208B · Oceanside, CA · Accident · Serious injuries · Class 3 · Limited · Final report · Feb 24, 2022 · N10JA · Substantial damage > The pilot’s intentional inflight operation of the propeller in beta, which led to an aerodynamic lock, his inability to restore forward thrust, and subsequent collision with terrain. - [NTSB DCA22FA082](https://openairdocs.org/ntsb/DCA22FA082.md): Joby Aero JAS4-2 · Jolon, CA · Accident · No injuries · Class 3 · Field · Final report · Feb 16, 2022 · N542AJ · Substantial damage > The separation of a propeller blade during expansion flight testing that resulted in cascading effects to include the separation of multiple propulsion motor/propeller assemblies and the loss of remote pilot control of the aircraft. Contributing to the… - [NTSB CEN22LA085](https://openairdocs.org/ntsb/CEN22LA085.md): Beech A100 · West Helena, AR · Accident · No injuries · Class 3 · Limited · Final report · Dec 28, 2021 · N93GT · Substantial damage > The malfunction of the propeller autofeather system after takeoff for undetermined reasons, which resulted in both propellers going into feather and a hard landing. - [NTSB WPR21LA301](https://openairdocs.org/ntsb/WPR21LA301.md): Piper PA-28-140 · Amado, AZ · Accident · No injuries · Class 3 · Limited · Final report · Aug 2, 2021 · N44245 · Substantial damage > The inflight separation of a section of a propeller blade due to a fatigue crack, which resulted in a forced landing. - [NTSB ERA21LA289](https://openairdocs.org/ntsb/ERA21LA289.md): Piper PA-23 · Easton, MD · Accident · No injuries · Class 3 · Limited · Final report · Jul 15, 2021 · N776MC · Substantial damage > A total loss of left engine power and uncommanded feathering of the left propeller for reasons that could not be determined. - [NTSB WPR21LA208](https://openairdocs.org/ntsb/WPR21LA208.md): Boeing A75N1(PT17) · Hollister, CA · Accident · Minor injuries · Class 3 · Limited · Final report · May 26, 2021 · N75016 · Substantial damage > The improper installation of a relief valve spring that was shorter than the standard spring length, which slowed the response of the propeller governor to change the pitch of the blades during climbout, resulting in a partial loss of power. - [NTSB ERA21LA223](https://openairdocs.org/ntsb/ERA21LA223.md): Zenith Zodiac 601 XL · McKenzie, TN · Accident · No injuries · Class 3 · Limited · Final report · May 15, 2021 · N493TG · Substantial damage > The improper installation and inspection of the propeller, which resulted in an in-flight separation of the propeller assembly. - [NTSB ERA20CA296](https://openairdocs.org/ntsb/ERA20CA296.md): Beech 55 · Nashville, TN · Accident · No injuries · Class 4 · Data collection · Final report · Aug 24, 2020 · N8629M · Substantial damage > The pilot's inadvertent feathering of the propellers during the landing flare, which resulted in a hard landing. A factor in the accident was the instructor's failure to fully monitor the pilot's manipulation of the levers in the airplane's non-standard… - [NTSB WPR20LA270](https://openairdocs.org/ntsb/WPR20LA270.md): Piper PA 14 · Susanville, CA · Accident · 2 fatal · Class 3 · Limited · Final report · Aug 15, 2020 · N91449 · Substantial damage > The pilot’s decision to conduct a steep departure at a high-density altitude and the exceedance of the airplane’s critical angle of attack during a climb, which resulted in an accelerated stall and subsequent loss of control. Contributing to the accident was… - [NTSB CEN20LA207](https://openairdocs.org/ntsb/CEN20LA207.md): Icon A5 · Duluth, MN · Accident · No injuries · Class 3 · Limited · Final report · Jun 3, 2020 · N838BA · Substantial damage > The pilot’s failure to remove an object from the airplane’s exterior, which impacted the propeller blades when he applied full power, causing them to fracture and damage the airplane. - [NTSB ERA20LA202](https://openairdocs.org/ntsb/ERA20LA202.md): Piper PA23 · San Juan, PR · Accident · 2 fatal · Class 3 · Limited · Final report · Jun 2, 2020 · N14181 · Substantial damage > The pilot’s intentional operation of the airplane with known deficiencies of the left engine and subsequent in-flight loss of control after takeoff. Contributing to the loss of engine power was internal contamination of the left servo fuel injector.… - [NTSB ERA20CA112](https://openairdocs.org/ntsb/ERA20CA112.md): Beech 58 · Augusta, GA · Accident · Minor injuries · Class 4 · Data collection · Final report · Feb 23, 2020 · N60SH · Substantial damage > The pilot's failure to land and stop the airplane within the available runway, which resulted in a runway overrun. Contributing to the outcome was the pilot's inadvertent feathering of both propellers during approach to landing. - [NTSB ERA20LA077](https://openairdocs.org/ntsb/ERA20LA077.md): Velocity Elite RG · St. Petersburg, FL · Accident · No injuries · Class 3 · Limited · Final report · Jan 14, 2020 · N78BM · Substantial damage > A failure of the propeller pitch change electric motor, which resulted in an improper setting for takeoff and a subsequent runway overrun. Also causal was the inadequate maintenance and inspection of the propeller system and the pilot’s failure to follow the… - [NTSB WPR20LA062](https://openairdocs.org/ntsb/WPR20LA062.md): Cessna 172H · El Monte, CA · Accident · No injuries · Class 3 · Limited · Final report · Jan 6, 2020 · N1658F · Substantial damage > The inflight separation of a section of a propeller blade due to a fatigue crack which resulted in a forced landing. - [NTSB GAA20CA039](https://openairdocs.org/ntsb/GAA20CA039.md): Zenair CH 701 · Safford, AZ · Accident · No injuries · Data collection · Final report · Oct 20, 2019 · N3784A · Substantial damage > The in-flight separation of a propeller blade for reasons that could not be determined based on the available evidence, which resulted in an off-airport landing on soft sand and the separation of main landing gear. Contributing to the accident was the pilot’s… - [NTSB WPR19LA273](https://openairdocs.org/ntsb/WPR19LA273.md): Smyth Sidewinder · Tucumcari, NM · Accident · No injuries · Class 3 · Limited · Final report · Sep 14, 2019 · N492AC · Substantial damage > The in-flight separation of a section of a propeller blade due to a fatigue crack, which resulted in a forced landing. - [NTSB CEN19LA313](https://openairdocs.org/ntsb/CEN19LA313.md): Jackson Velocity · Mack, CO · Accident · No injuries · Class 3 · Limited · Final report · Sep 3, 2019 · N2XF · Substantial damage > A propeller overspeed due to failure of the electronic ignition timing ring attachment screws, and a runway overrun during the subsequent forced landing. - [NTSB CEN19LA295](https://openairdocs.org/ntsb/CEN19LA295.md): Air Tractor AT502 · Olney, TX · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 29, 2019 · N8517Q · Substantial damage > A loss of thrust control due to a propeller surge event, which resulted in a forced landing shortly after takeoff. - [NTSB ANC19LA046](https://openairdocs.org/ntsb/ANC19LA046.md): Cessna 208B · Lahaina, HI · Accident · No injuries · Class 3 · Limited · Final report · Aug 18, 2019 · N879MA · Substantial damage > The pilots’ failure to maintain a proper approach speed and their decision to continue the approach for landing, which resulted in the airplane landing long and a subsequent runway overrun. - [NTSB ERA19LA232](https://openairdocs.org/ntsb/ERA19LA232.md): Vans RV7 · Ocean City, MD · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 19, 2019 · N849GS · Substantial damage > The disconnection of the propeller governor control arm from the propeller governor due to a missing attachment bolt, which resulted in a partial loss of engine power during takeoff when the governor control vibrated to a high pitch, low rpm setting. - [NTSB ERA19LA228](https://openairdocs.org/ntsb/ERA19LA228.md): Pietenpol BIG Piet · Gainesboro, TN · Accident · No injuries · Class 3 · Limited · Final report · Jul 16, 2019 · N973BP · Substantial damage > Separation of the spinner cap for reasons that could not be determined based on available evidence, which resulted in contact and subsequent separation of the wooden propeller blade tip. - [NTSB ERA19LA214](https://openairdocs.org/ntsb/ERA19LA214.md): Pipistrel Sinus · Haverhill, MA · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 4, 2019 · N269PW · Substantial damage > The pilot's failure to utilize the proper procedure and unfeather the motorized glider’s propeller prior to an in-flight engine restart, resulting in a lack of thrust and subsequent forced landing. - [NTSB ERA19LA096](https://openairdocs.org/ntsb/ERA19LA096.md): Convair C131 · Atlantic Ocean (Atlantic Ocean) · Accident · 1 fatal · Limited investigation · Final report · Feb 8, 2019 · N145GT · Destroyed > The captain's decision to continue with the flight with a malfunctioning left engine propeller control and the subsequent loss of engine power on both engines for undetermined reasons, which resulted in ditching into the ocean. Contributing to the accident… - [NTSB CEN19LA056](https://openairdocs.org/ntsb/CEN19LA056.md): Douglas DC3C · Kidron, OH · Accident · 2 fatal · Limited investigation · Final report · Jan 21, 2019 · N467KS · Substantial damage > The loss of airplane control after an engine flameout and auto-feather system interruption during the takeoff climb, which resulted in an impact with terrain. - [NTSB ERA19FA060](https://openairdocs.org/ntsb/ERA19FA060.md): Cessna 335 · Fort Lauderdale, FL · Accident · 2 fatal · Class 2 · Field · Final report · Dec 1, 2018 · N79HP · Destroyed > The pilot's improper decision to fly the unairworthy airplane and his failure to feather the left propeller following a partial loss of power from the left engine after takeoff. Also causal was the partial loss of power to the left engine due to detonation. Next page: https://openairdocs.org/ntsb-findings/010461/cases.md?page=2 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1 WHERE c."mKey" IN (SELECT f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '010461')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-findings/010461/cases --- 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.