# Aircraft propeller/rotor, general - Type: NTSB finding section - Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft propeller/rotor](https://openairdocs.org/ntsb-findings/0104) › Aircraft propeller/rotor, general - NTSB code: 010400 - Cases: 11 - In the probable cause: 7 - Fatal cases: 2 - All cases: https://openairdocs.org/ntsb-findings/010400/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/010400/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/010400 ## Cases per year (in the probable cause / all) - 2009: 0 / 1 - 2011: 1 / 2 - 2012: 2 / 2 - 2013: 2 / 2 - 2015: 0 / 1 - 2017: 0 / 1 - 2018: 1 / 1 - 2024: 1 / 1 ## Findings - [Aircraft propeller/rotor, general](https://openairdocs.org/ntsb-findings/01040000): 11 cases, 7 in the probable cause ## Defining events in these cases - [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 3 cases - [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 2 cases - [Loss of lift](https://openairdocs.org/ntsb-events/500): 1 cases - [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 1 cases - [Part(s) separation from AC](https://openairdocs.org/ntsb-events/338): 1 cases - [Controlled flight into terr/obj (CFIT)](https://openairdocs.org/ntsb-events/120): 1 cases - [Abnormal runway contact](https://openairdocs.org/ntsb-events/090): 1 cases - [AC/prop/rotor contact w person](https://openairdocs.org/ntsb-events/081): 1 cases ## Aircraft models (registry) - [Socata TB 10](https://openairdocs.org/model/socata-tb-10): 1 cases - [Robinson Helicopter R44 II](https://openairdocs.org/model/robinson-helicopter-r44-ii): 1 cases - [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta): 1 cases - [Cessna 152](https://openairdocs.org/model/cessna-152): 1 cases - [Bell OH-58A](https://openairdocs.org/model/bell-oh-58a): 1 cases - [Bell 47G-2](https://openairdocs.org/model/bell-47g-2): 1 cases - [Stemme S10-VT](https://openairdocs.org/model/stemme-s10-vt): 1 cases - [Robert Snyder SEAREY](https://openairdocs.org/model/robert-snyder-searey): 1 cases - [Frederick Bob JR TITAN T-51 MUSTANG](https://openairdocs.org/model/frederick-bob-jr-titan-t-51-mustang): 1 cases - [Burtner Charles W DERJAGER D IX](https://openairdocs.org/model/burtner-charles-w-derjager-d-ix): 1 cases ## Other findings in the same cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 2 cases - [Availability of policy/proc](https://openairdocs.org/ntsb-findings/04021010) (Organizational issues): 1 cases - [Haze/smoke](https://openairdocs.org/ntsb-findings/03035020) (Environmental issues): 1 cases - [Wind, general](https://openairdocs.org/ntsb-findings/03034000) (Environmental issues): 1 cases - [High density altitude](https://openairdocs.org/ntsb-findings/03031020) (Environmental issues): 1 cases - [Wire](https://openairdocs.org/ntsb-findings/03022032) (Environmental issues): 1 cases - [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 1 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 1 cases - [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 1 cases - [Recent experience](https://openairdocs.org/ntsb-findings/02031035) (Personnel issues): 1 cases ## Newest cases - [NTSB ERA24LA276](https://openairdocs.org/ntsb/ERA24LA276), Jun 25, 2024: Snyder Searey (N453TS), New Ipswich, NH, substantial damage. Probable cause: A total loss of engine power due to the exhaust muffler and tailpipe assembly separating from its attach points and impacting the propeller. - [NTSB CEN18FA258](https://openairdocs.org/ntsb/CEN18FA258), Jul 6, 2018: Bell 47G (N96195), Arlington, IN, substantial damage, 1 fatal. Probable cause: The inflight separation of the upper transmission due to the thread failure of transmission housing attachment bolts, which were installed on the helicopter with thread damage from a prior… - [NTSB WPR17LA121](https://openairdocs.org/ntsb/WPR17LA121), Jun 4, 2017: Bob Frederick Titan T-51 (N51FB), Goodyear, AZ, substantial damage. Probable cause: Failure of the propeller speed reduction gearbox input drive gear during the airplane’s initial climb for reasons that could not be determined due to extensive damage. - [NTSB GAA15CA196](https://openairdocs.org/ntsb/GAA15CA196), Jul 2, 2015: Robinson Helicopter R44 II (N824DK), Forest City, SD, substantial damage. Probable cause: The pilot's failure to monitor the flight environment for adequate terrain/obstacle clearance during takeoff, which resulted in the inflight collision with power transmission line wires. - [NTSB CEN13LA524](https://openairdocs.org/ntsb/CEN13LA524), Aug 31, 2013: Stemme S10-VT (N389BD), Mackinaw City, MI, substantial damage. Probable cause: The mechanic’s failure to inspect the tightness of the bolts that connected the flexible disk to the driveshaft, which resulted in the failure of these components. - [NTSB CEN13LA401](https://openairdocs.org/ntsb/CEN13LA401), Jul 6, 2013: JDT 1600R (UNREG), Chesaning, MI, destroyed, 1 fatal. Probable cause: The failure of the propeller reduction gearbox and the pilot’s subsequent failure to maintain adequate airspeed, which led to the airplane exceeding its critical angle-of-attack and experiencing an… - [NTSB ERA12IA459](https://openairdocs.org/ntsb/ERA12IA459), Jul 15, 2012: Socata TB10 (N189TB), Pawtucket, RI, incident, no damage. Probable cause: The in-flight separation of the propeller blade tip due to a fatigue fracture. - [NTSB WPR12LA096](https://openairdocs.org/ntsb/WPR12LA096), Jan 21, 2012: Arrow Falcon Exporters OH-58A (N902SF), Brawley, CA, substantial damage. Probable cause: The failure of the main rotor mast due to fatigue cracks that originated from corrosion pits. Contributing to the accident was the operator’s failure to adhere to the manufacturer’s recommended… - [NTSB CEN11LA464](https://openairdocs.org/ntsb/CEN11LA464), Jul 7, 2011: Burtner Charles W Derjager D IX (N7808M), East Liverpool, OH, substantial damage. Probable cause: The pilot's improper landing flare, which resulted in a porpoised landing and propeller contact with the runway, which caused an in-flight disintegration of the propeller during the go-around, and… - [NTSB CEN11LA368](https://openairdocs.org/ntsb/CEN11LA368), May 25, 2011: Cessna 152 (N222UM), Ann Arbor, MI, no damage. Probable cause: The flight instructor’s failure to maintain clearance from the propeller when exiting the airplane. Contributing to the accident were the instructor’s decision not to shut down the engine before… 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.