# Propeller system, general - Type: NTSB finding subsection - Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft propeller/rotor](https://openairdocs.org/ntsb-findings/0104) › [Propeller system](https://openairdocs.org/ntsb-findings/010461) › Propeller system, general - NTSB code: 01046100 - Cases: 20 - In the probable cause: 17 - Fatal cases: 7 - All cases: https://openairdocs.org/ntsb-findings/01046100/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01046100/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/01046100 ## Cases per year (in the probable cause / all) - 2008: 3 / 3 - 2009: 2 / 2 - 2010: 4 / 4 - 2011: 1 / 1 - 2012: 3 / 3 - 2013: 1 / 2 - 2014: 1 / 2 - 2016: 2 / 2 - 2020: 0 / 1 ## Defining events in these cases - [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 9 cases - [Part(s) separation from AC](https://openairdocs.org/ntsb-events/338): 4 cases - [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 2 cases - [Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241): 2 cases - [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 1 cases - [Cabin safety event](https://openairdocs.org/ntsb-events/110): 1 cases - [Hard landing](https://openairdocs.org/ntsb-events/092): 1 cases ## Aircraft models (registry) - [Piper PA-14](https://openairdocs.org/model/piper-pa-14): 1 cases - [Mooney M20K](https://openairdocs.org/model/mooney-m20k): 1 cases - [Mooney M20J](https://openairdocs.org/model/mooney-m20j): 1 cases - [Curtiss JN4D](https://openairdocs.org/model/curtiss-jn4d): 1 cases - [M-Squared SPRINT 1000](https://openairdocs.org/model/m-squared-sprint-1000): 1 cases - [Frederick Hays-Roth VELOCITY TWIN](https://openairdocs.org/model/frederick-hays-roth-velocity-twin): 1 cases - [Mcdonald Howard Brian ZENAIR 701](https://openairdocs.org/model/mcdonald-howard-brian-zenair-701): 1 cases - [Mischke David BD-5B](https://openairdocs.org/model/mischke-david-bd-5b): 1 cases - [Fox Jack G MONG BIWING](https://openairdocs.org/model/fox-jack-g-mong-biwing): 1 cases - [Koleno William TITAN T-51](https://openairdocs.org/model/koleno-william-titan-t-51): 1 cases ## Other findings in the same cases - [Installation](https://openairdocs.org/ntsb-findings/02062035) (Personnel issues): 5 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 5 cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 3 cases - [Angle of attack](https://openairdocs.org/ntsb-findings/01062042) (Aircraft): 3 cases - [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 2 cases - [Documentation/record keeping, general](https://openairdocs.org/ntsb-findings/04033000) (Organizational issues): 2 cases - [Incorrect action performance](https://openairdocs.org/ntsb-findings/02041015) (Personnel issues): 2 cases - [Landing flare](https://openairdocs.org/ntsb-findings/01062041) (Aircraft): 2 cases - [Altitude](https://openairdocs.org/ntsb-findings/01062012) (Aircraft): 2 cases - [Airspeed](https://openairdocs.org/ntsb-findings/01062010) (Aircraft): 2 cases ## Newest cases - [NTSB WPR20LA270](https://openairdocs.org/ntsb/WPR20LA270), Aug 15, 2020: Piper PA 14 (N91449), Susanville, CA, substantial damage, 2 fatal. Probable cause: 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… - [NTSB ERA17FA050](https://openairdocs.org/ntsb/ERA17FA050), Nov 17, 2016: Curtiss JN4 (N1662), Williamson, GA, destroyed, 2 fatal. Probable cause: The in-flight failure of the propeller due to excessive engine vibration loads and the use of an incorrectly-sized propeller, which resulted in a fatigue crack of the leading edge strip. Contributing… - [NTSB ERA16FA325](https://openairdocs.org/ntsb/ERA16FA325), Sep 25, 2016: Mooney M20J (N526AM), Pittstown, NJ, substantial damage, 2 fatal. Probable cause: The pilot's improper landing touchdown attitude, which resulted in a propeller strike, and his inappropriate decision to abort the landing after the propeller had contacted the runway, which resulted… - [NTSB ERA14LA279](https://openairdocs.org/ntsb/ERA14LA279), Jun 2, 2014: Frederick Hays-Roth Velocity Twin (N360VT), Sebastian, FL, substantial damage. Probable cause: The pilot’s improper landing flare, which resulted in a bounced landing. Also causal to the accident were the pilot’s subsequent delayed decision to abort the landing and his improper execution of… - [NTSB CEN14LA235](https://openairdocs.org/ntsb/CEN14LA235), May 10, 2014: Pazmany PL 4 (N44PL), Yates City, IL, substantial damage. Probable cause: A loss of propeller thrust due to a failure of the reduction drive unit resulting from the improper installation of the unit. Contributing to the accident was a lack of documentation for the… - [NTSB CEN14CA039](https://openairdocs.org/ntsb/CEN14CA039), Oct 20, 2013: Wohaska John Parsons Stiles Gyro (N7064U), Festus, MO, substantial damage. Probable cause: The pilot's improper propeller adjustment, which resulted in decreased performance and a loss of aircraft control. - [NTSB ERA14LA004](https://openairdocs.org/ntsb/ERA14LA004), Oct 19, 2013: Mcdonald Howard Brian Zenair 701 (N538HB), Zephyrhills, FL, substantial damage. Probable cause: The failure of the propeller speed reduction unit drive belts due to inadequate belt tension being applied during installation, which resulted in a complete loss of thrust. - [NTSB CEN12LA539](https://openairdocs.org/ntsb/CEN12LA539), Aug 11, 2012: Gn-1 Aircamper Mathes (N31TM), Burlington, WI, substantial damage. Probable cause: The pilot's improper installation of the propeller bolts, which resulted in the in-flight separation of the propeller. - [NTSB CEN12CA597](https://openairdocs.org/ntsb/CEN12CA597), Jul 31, 2012: Bordelon Bruce Kitfox IV (N396BK), Castlerock, MN, destroyed. Probable cause: Propeller system failure during a go-around maneuver resulting in a forced landing. Contributing to the severity of damage to the airplane was the postimpact fire. - [NTSB WPR12LA265](https://openairdocs.org/ntsb/WPR12LA265), Jun 16, 2012: Roetman Ryland K JR Eagle (N106BD), Rexburg, ID, substantial damage. Probable cause: A loss of engine oil pressure, which led to the subsequent uncommanded loss of thrust and decrease in the propeller rpm during a low-level aerobatic maneuver. 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.