# Airspeed/mach indicating - Type: NTSB finding subsection - Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft systems](https://openairdocs.org/ntsb-findings/0102) › [Navigation system](https://openairdocs.org/ntsb-findings/010234) › Airspeed/mach indicating - NTSB code: 01023414 - Cases: 6 - In the probable cause: 4 - Fatal cases: 0 - All cases: https://openairdocs.org/ntsb-findings/01023414/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01023414/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/01023414 ## Cases per year (in the probable cause / all) - 2008: 1 / 1 - 2009: 2 / 3 - 2020: 0 / 1 - 2022: 1 / 1 ## Defining events in these cases - [Loss of control on ground](https://openairdocs.org/ntsb-events/230): 2 cases - [Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470): 1 cases - [Flight instrument malf/fail](https://openairdocs.org/ntsb-events/334): 1 cases - [Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241): 1 cases - [Hard landing](https://openairdocs.org/ntsb-events/092): 1 cases ## Aircraft models (registry) - [Cessna 150H](https://openairdocs.org/model/cessna-150h): 1 cases - [Beech S35](https://openairdocs.org/model/beech-s35): 1 cases - [Czech Aircraft Works Spol Sro SPORTCRUISER](https://openairdocs.org/model/czech-aircraft-works-spol-sro-sportcruiser): 1 cases - [GMK Ventures AL18](https://openairdocs.org/model/gmk-ventures-al18): 1 cases - [Chatham Robert M RV6-A](https://openairdocs.org/model/chatham-robert-m-rv6-a): 1 cases - [Hawkins August E AVENTURA II](https://openairdocs.org/model/hawkins-august-e-aventura-ii): 1 cases ## Other findings in the same cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 5 cases - [Directional control](https://openairdocs.org/ntsb-findings/01062020) (Aircraft): 3 cases - [Pitot/static system](https://openairdocs.org/ntsb-findings/01023411) (Aircraft): 2 cases - [Dark](https://openairdocs.org/ntsb-findings/03036020) (Environmental issues): 1 cases - [Debris/dirt/foreign object](https://openairdocs.org/ntsb-findings/03022055) (Environmental issues): 1 cases - [Preflight inspection](https://openairdocs.org/ntsb-findings/02061510) (Personnel issues): 1 cases - [Surface speed/braking](https://openairdocs.org/ntsb-findings/01062045) (Aircraft): 1 cases - [Landing flare](https://openairdocs.org/ntsb-findings/01062041) (Aircraft): 1 cases - [Descent/approach/glide path](https://openairdocs.org/ntsb-findings/01062040) (Aircraft): 1 cases - [Performance/control parameters, general](https://openairdocs.org/ntsb-findings/01062000) (Aircraft): 1 cases ## Newest cases - [NTSB WPR22LA233](https://openairdocs.org/ntsb/WPR22LA233), Jun 27, 2022: GMK Ventures AL18 (N17GK), Moab, UT, substantial damage. Probable cause: The pilot’s failure to maintain directional control during a landing attempt, which resulted in a ground loop and collision with terrain. Contributing to the accident was the absence of an airspeed… - [NTSB WPR21LA005](https://openairdocs.org/ntsb/WPR21LA005), Oct 5, 2020: Cessna 150 (N22979), Rimrock, AZ, substantial damage. Probable cause: The pilot’s improper landing flare, which resulted in a hard, bounced landing and runway excursion. - [NTSB ERA09CA333](https://openairdocs.org/ntsb/ERA09CA333), Jun 9, 2009: Chatham Robert M RV6-A (N55EC), Gilbert, SC, substantial damage. Probable cause: The pilot’s failure to maintain directional control of the airplane during landing roll. Contributing to the accident was the airspeed indicator that became inoperative during the landing approach. - [NTSB CEN09CA342](https://openairdocs.org/ntsb/CEN09CA342), Jun 5, 2009: Beech S35 (N8636Q), Decatur, TX, substantial damage. Probable cause: Both pilots' inadequate preflight inspection and failure to identify the presence of dirt and insect larvae in the pitot tube, and the owner-pilot's attempt to turn off the runway and onto the… - [NTSB CEN09LA276](https://openairdocs.org/ntsb/CEN09LA276), May 2, 2009: Hawkins August E Aventura II (N20GH), Griffith, IN, substantial damage. Probable cause: The pilot's failure to maintain control of the airplane due to an inadvertent stall. Contributing to the accident was the failure of the airspeed indicator due to separation of the pitot-static line… - [NTSB ERA09LA111](https://openairdocs.org/ntsb/ERA09LA111), Dec 23, 2008: Czech Aircraft Works SportCruiser (N524SC), Emporia, VA, substantial damage. Probable cause: The student pilot's failure to maintain directional control during the landing. Contributing to the accident was the improperly marked airspeed indicator and the airplane manufacturer's improper… 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.