# Lack of sleep - Type: NTSB finding subsection - Path: [Personnel issues](https://openairdocs.org/ntsb-findings/02) › [Physical](https://openairdocs.org/ntsb-findings/0201) › [Alertness/Fatigue](https://openairdocs.org/ntsb-findings/020135) › Lack of sleep - NTSB code: 02013510 - Cases: 26 - In the probable cause: 19 - Fatal cases: 12 - All cases: https://openairdocs.org/ntsb-findings/02013510/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/02013510/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/02013510 ## Cases per year (in the probable cause / all) - 2008: 2 / 2 - 2009: 1 / 1 - 2010: 3 / 3 - 2011: 2 / 2 - 2012: 1 / 4 - 2013: 4 / 4 - 2014: 1 / 1 - 2015: 1 / 1 - 2016: 0 / 2 - 2017: 2 / 3 - 2019: 0 / 1 - 2022: 1 / 1 - 2025: 1 / 1 ## Defining events in these cases - [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 7 cases - [Controlled flight into terr/obj (CFIT)](https://openairdocs.org/ntsb-events/120): 4 cases - [Miscellaneous/other](https://openairdocs.org/ntsb-events/900): 2 cases - [Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470): 2 cases - [Low altitude operation/event](https://openairdocs.org/ntsb-events/220): 2 cases - [Collision during takeoff/land](https://openairdocs.org/ntsb-events/490): 1 cases - [VFR encounter with IMC](https://openairdocs.org/ntsb-events/401): 1 cases - [Wrong surface or wrong airport](https://openairdocs.org/ntsb-events/284): 1 cases - [Loss of tail rotor effectiveness](https://openairdocs.org/ntsb-events/242): 1 cases - [Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241): 1 cases ## Aircraft models (registry) - [Glines Kenneth TAILWIND W-8](https://openairdocs.org/model/glines-kenneth-tailwind-w-8): 1 cases - [Aerospatiale/Aeritalia ATR 42-320](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-320): 1 cases - [Robinson Helicopter R44 II](https://openairdocs.org/model/robinson-helicopter-r44-ii): 1 cases - [Robinson Helicopter R44](https://openairdocs.org/model/robinson-helicopter-r44): 1 cases - [Raytheon Corporate Jets BAE 125-800A](https://openairdocs.org/model/raytheon-corporate-jets-bae-125-800a): 1 cases - [Piper PA-44-180](https://openairdocs.org/model/piper-pa-44-180): 1 cases - [Piper PA-28R-180](https://openairdocs.org/model/piper-pa-28r-180): 1 cases - [Piper PA-28-151](https://openairdocs.org/model/piper-pa-28-151): 1 cases - [North American AT-6A](https://openairdocs.org/model/north-american-at-6a): 1 cases - [Mitsubishi MU-2B-40](https://openairdocs.org/model/mitsubishi-mu-2b-40): 1 cases ## Other findings in the same cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 8 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 4 cases - [Fatigue due to work schedule](https://openairdocs.org/ntsb-findings/02013520) (Personnel issues): 4 cases - [Circadian rhythms or jetlag](https://openairdocs.org/ntsb-findings/02013515) (Personnel issues): 4 cases - [Altitude](https://openairdocs.org/ntsb-findings/01062012) (Aircraft): 4 cases - [Adequacy of policy/proc](https://openairdocs.org/ntsb-findings/04021015) (Organizational issues): 3 cases - [Dark](https://openairdocs.org/ntsb-findings/03036020) (Environmental issues): 3 cases - [Low ceiling](https://openairdocs.org/ntsb-findings/03035010) (Environmental issues): 3 cases - [CRM/MRM techniques](https://openairdocs.org/ntsb-findings/02063540) (Personnel issues): 3 cases - [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 3 cases ## Newest cases - [NTSB CEN26LA033](https://openairdocs.org/ntsb/CEN26LA033), Oct 30, 2025: Cessna 182H (N2040X), Lakeview, AR, substantial damage. Probable cause: The pilot’s failure to maintain a proper approach path during landing which resulted in a collision with terrain short of the runway. Contributing to the accident was the improper flap position… - [NTSB WPR22FA101](https://openairdocs.org/ntsb/WPR22FA101), Feb 20, 2022: Mcdonnell Douglas 500N (N521HB), Newport Beach, CA, substantial damage, 1 fatal. Probable cause: The helicopter’s encounter with unanticipated right yaw during a low-altitude, low-airspeed, tight-radius orbit. Contributing to the accident was the pilot’s distraction during the orbit, which… - [NTSB CEN19MA312](https://openairdocs.org/ntsb/CEN19MA312), Sep 11, 2019: Convair 440 (N24DR), Monclova, OH, destroyed, 2 fatal. Probable cause: The flight crew’s failure to maintain the proper airspeed on final approach, which resulted in an inadvertent aerodynamic stall and impact with trees, and terrain. Contributing to the accident was… - [NTSB DCA17IA148](https://openairdocs.org/ntsb/DCA17IA148), Jul 8, 2017: Airbus A320-211 (C-FKCK), San Francisco, CA, incident, no damage. Probable cause: The flight crew's misidentification of taxiway C as the intended landing runway, which resulted from the crewmembers' lack of awareness of the parallel runway closure due to their ineffective review… - [NTSB ERA17FA181](https://openairdocs.org/ntsb/ERA17FA181), May 15, 2017: Mitsubishi MU2B (N220N), Eleuthera, Bahamas, destroyed, 4 fatal. Probable cause: The pilot's intentional flight into an area of known icing and convective thunderstorm activity, which resulted in a loss of control of the airplane. - [NTSB ERA17LA096](https://openairdocs.org/ntsb/ERA17LA096), Jan 27, 2017: Beech 200 (N60RA), West Palm Beach, FL, substantial damage. Probable cause: The pilot's failure to ensure that the landing gear were down and locked before touchdown. Contributing to the accident was the pilot’s self-reported fatigue at the time of the accident. - [NTSB WPR16FA087](https://openairdocs.org/ntsb/WPR16FA087), Mar 23, 2016: North American AT 6A (N7055D), Astoria, OR, destroyed, 2 fatal. Probable cause: The pilot's loss of aircraft control during a low-altitude ash dispersal maneuver. Contributing to the accident was his degraded performance due to his medical conditions. - [NTSB GAA16CA121](https://openairdocs.org/ntsb/GAA16CA121), Jan 25, 2016: Glines Kenneth Tailwind W 8 (N1983T), Big Bear, CA, substantial damage. Probable cause: The pilot's inadvertent landing off the left side of the snow-covered runway, resulting in a ground loop and nose over. - [NTSB ERA15FA326](https://openairdocs.org/ntsb/ERA15FA326), Aug 27, 2015: Piper PA44 (N553MD), Houlton, ME, destroyed, 1 fatal. Probable cause: The pilot's descent below the published minimum descent altitude in night instrument meteorological conditions without visual contact with the runway environment, which resulted in a collision with… - [NTSB WPR14TA149](https://openairdocs.org/ntsb/WPR14TA149), Mar 27, 2014: Bell OH-58A (N497E), Tehachapi, CA, substantial damage. Probable cause: The pilot's decision to attempt a mission at night with known en route weather conditions below operating minimums, likely due to self-induced pressure, and then continue flight beyond the alternate… 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.