# Fatigue due to work schedule - 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) › Fatigue due to work schedule - NTSB code: 02013520 - Cases: 25 - In the probable cause: 21 - Fatal cases: 9 - All cases: https://openairdocs.org/ntsb-findings/02013520/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/02013520/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/02013520 ## Cases per year (in the probable cause / all) - 2008: 3 / 4 - 2011: 4 / 4 - 2013: 4 / 5 - 2015: 1 / 1 - 2016: 0 / 1 - 2017: 1 / 1 - 2020: 2 / 2 - 2021: 1 / 1 - 2022: 2 / 3 - 2023: 1 / 1 - 2024: 1 / 1 - 2026: 1 / 1 ## Defining events in these cases - [Landing gear not configured](https://openairdocs.org/ntsb-events/095): 4 cases - [Collision during takeoff/land](https://openairdocs.org/ntsb-events/490): 3 cases - [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 3 cases - [Controlled flight into terr/obj (CFIT)](https://openairdocs.org/ntsb-events/120): 3 cases - [Miscellaneous/other](https://openairdocs.org/ntsb-events/900): 1 cases - [Landing area undershoot](https://openairdocs.org/ntsb-events/370): 1 cases - [Electrical system malf/failure](https://openairdocs.org/ntsb-events/332): 1 cases - [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 1 cases - [Runway excursion](https://openairdocs.org/ntsb-events/300): 1 cases - [Wrong surface or wrong airport](https://openairdocs.org/ntsb-events/284): 1 cases ## Aircraft models (registry) - [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140): 2 cases - [Weatherly 620B](https://openairdocs.org/model/weatherly-620b): 1 cases - [Schweizer G-164D](https://openairdocs.org/model/schweizer-g-164d): 1 cases - [Robinson Helicopter R44 II](https://openairdocs.org/model/robinson-helicopter-r44-ii): 1 cases - [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350): 1 cases - [Eurocopter Deutschland MBB-BK 117 C-2](https://openairdocs.org/model/eurocopter-deutschland-mbb-bk-117-c-2): 1 cases - [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d): 1 cases - [Hawker Beechcraft 390](https://openairdocs.org/model/hawker-beechcraft-390): 1 cases - [Grumman Acft ENG Cor-Schweizer G-164B](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b): 1 cases - [Grumman G-164A](https://openairdocs.org/model/grumman-g-164a): 1 cases ## Other findings in the same cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 8 cases - [Forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035) (Personnel issues): 4 cases - [Lack of sleep](https://openairdocs.org/ntsb-findings/02013510) (Personnel issues): 4 cases - [Wire](https://openairdocs.org/ntsb-findings/03022032) (Environmental issues): 3 cases - [Identification/recognition](https://openairdocs.org/ntsb-findings/02041510) (Personnel issues): 3 cases - [Task monitoring/vigilance](https://openairdocs.org/ntsb-findings/02021520) (Personnel issues): 3 cases - [Performance/control parameters, general](https://openairdocs.org/ntsb-findings/01062000) (Aircraft): 3 cases - [Adequacy of policy/proc](https://openairdocs.org/ntsb-findings/04021015) (Organizational issues): 2 cases - [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 2 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 2 cases ## Newest cases - [NTSB CEN26LA105](https://openairdocs.org/ntsb/CEN26LA105), Jan 31, 2026: Cessna 441 (N441EC), Pflugerville, TX, substantial damage. Probable cause: The pilot’s failure to maintain airplane control during a rejected takeoff due to a flat nose wheel tire which resulted in a runway excursion and impact with terrain. Contributing to the accident was… - [NTSB WPR24LA265](https://openairdocs.org/ntsb/WPR24LA265), Aug 3, 2024: Bell 407 (N20BH), Raft River, ID, substantial damage. Probable cause: The pilot’s misdiagnosis of an erroneous engine instrument indication and his subsequent decision to enter an autorotation, which resulted in a hard landing due to degraded visual cues and low… - [NTSB WPR23LA212](https://openairdocs.org/ntsb/WPR23LA212), Jun 4, 2023: Grumman Acft ENG Cor-Schweizer G-164B (N6750K), Colusa, CA, substantial damage. Probable cause: The pilot’s failure to maintain clearance from a power line during a low-level aerial application flight. Contributing to the accident was the pilot’s fatigue. - [NTSB DCA22LA126](https://openairdocs.org/ntsb/DCA22LA126), Jun 8, 2022: Boeing 757-236 (N949FD), Tulsa, OK, incident, no damage. Probable cause: The flight crew’s misidentification of the intended landing runway. Contributing to the incident were (1) the flight crew’s failure to perceive and correctly interpret visual and auditory indicators… - [NTSB ERA22LA145](https://openairdocs.org/ntsb/ERA22LA145), Mar 7, 2022: Airbus Helicopters MBB-BK 117 C-2 (N29VA), Abingdon, VA, substantial damage. Probable cause: The pilot’s misalignment of the helicopter skids while landing on a dolly at night, which resulted in the skids becoming entangled with the dolly and a loss of control. Contributing to the accident… - [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 WPR21FA231](https://openairdocs.org/ntsb/WPR21FA231), Jun 18, 2021: Piper PA-28-140 (N6323R), Rush Valley, UT, substantial damage, 2 fatal. Probable cause: The pilot’s misidentification of a mountain pass at night, which resulted in controlled flight into terrain. Contributing to the accident were the pilot’s overconfidence based on her previous… - [NTSB ANC20CA054](https://openairdocs.org/ntsb/ANC20CA054), May 24, 2020: Cessna 120 (N72536), Gulkana, AK, substantial damage. Probable cause: The pilot's failure to maintain proper airspeed during final approach to landing, and his subsequent failure to attain sufficient altitude to clear trees during an attempted go-around. - [NTSB CEN20LA136](https://openairdocs.org/ntsb/CEN20LA136), Mar 31, 2020: Robinson Helicopter R44 II (N107EH), Audubon, IA, destroyed, 2 fatal. Probable cause: The pilot’s failure to recognize and avoid the power line during the low-altitude flight. Contributing to the accident was the pilot’s fatigue, which affected the pilot’s ability to see and avoid the… - [NTSB ERA17LA189](https://openairdocs.org/ntsb/ERA17LA189), May 24, 2017: Beech 58 (N9132S), Augusta, GA, substantial damage. Probable cause: The pilot’s failure to properly configure the airplane for landing. Contributing to the accident were the pilot’s fatigue and self-induced distractions. 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.