# Monitoring other aircraft - Type: NTSB finding subsection - Path: [Personnel issues](https://openairdocs.org/ntsb-findings/02) › [Psychological](https://openairdocs.org/ntsb-findings/0202) › [Attention/monitoring](https://openairdocs.org/ntsb-findings/020215) › Monitoring other aircraft - NTSB code: 02021540 - Cases: 231 - In the probable cause: 222 - Fatal cases: 62 - All cases: https://openairdocs.org/ntsb-findings/02021540/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/02021540/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/02021540 ## Cases per year (in the probable cause / all) - 2008: 20 / 20 - 2009: 21 / 21 - 2010: 9 / 9 - 2011: 13 / 13 - 2012: 12 / 12 - 2013: 10 / 10 - 2014: 9 / 9 - 2015: 11 / 11 - 2016: 18 / 19 - 2017: 12 / 13 - 2018: 17 / 17 - 2019: 12 / 13 - 2020: 6 / 6 - 2021: 9 / 10 - 2022: 12 / 14 - 2023: 11 / 11 - 2024: 11 / 12 - 2025: 8 / 9 - 2026: 1 / 2 ## Defining events in these cases - [Midair collision](https://openairdocs.org/ntsb-events/250): 112 cases - [Ground collision](https://openairdocs.org/ntsb-events/200): 76 cases - [Collision during takeoff/land](https://openairdocs.org/ntsb-events/490): 10 cases - [Landing gear not configured](https://openairdocs.org/ntsb-events/095): 6 cases - [Abrupt maneuver](https://openairdocs.org/ntsb-events/270): 4 cases - [Aircraft wake turb encounter](https://openairdocs.org/ntsb-events/361): 3 cases - [Runway incursion veh/AC/person](https://openairdocs.org/ntsb-events/320): 3 cases - [Near midair/TCAS alert/loss of separation](https://openairdocs.org/ntsb-events/260): 3 cases - [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 3 cases - [Prop/jet/rotor blast/suction](https://openairdocs.org/ntsb-events/082): 3 cases ## Aircraft models (registry) - [Cessna 172S](https://openairdocs.org/model/cessna-172s): 12 cases - [Cessna 172N](https://openairdocs.org/model/cessna-172n): 9 cases - [Piper PA-28-161](https://openairdocs.org/model/piper-pa-28-161): 8 cases - [Cessna 172M](https://openairdocs.org/model/cessna-172m): 8 cases - [Cessna 152](https://openairdocs.org/model/cessna-152): 8 cases - [Piper PA-28-181](https://openairdocs.org/model/piper-pa-28-181): 6 cases - [Diamond Aircraft Ind DA20-C1](https://openairdocs.org/model/diamond-aircraft-ind-da20-c1): 5 cases - [Cirrus Design SR22](https://openairdocs.org/model/cirrus-design-sr22): 5 cases - [Air Tractor AT-802A](https://openairdocs.org/model/air-tractor-at-802a): 5 cases - [Air Tractor AT-502B](https://openairdocs.org/model/air-tractor-at-502b): 5 cases ## Other findings in the same cases - [Aircraft](https://openairdocs.org/ntsb-findings/03022040) (Environmental issues): 46 cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 21 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 20 cases - [Lack of communication](https://openairdocs.org/ntsb-findings/02063510) (Personnel issues): 15 cases - [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 14 cases - [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 13 cases - [Visibility](https://openairdocs.org/ntsb-findings/03041020) (Environmental issues): 10 cases - [Incorrect action performance](https://openairdocs.org/ntsb-findings/02041015) (Personnel issues): 9 cases - [Use of policy/procedure](https://openairdocs.org/ntsb-findings/02063032) (Personnel issues): 8 cases - [Attention](https://openairdocs.org/ntsb-findings/02021510) (Personnel issues): 8 cases ## Newest cases - [NTSB WPR26LA171](https://openairdocs.org/ntsb/WPR26LA171), Apr 25, 2026: Cessna 210 (N6130F), Redding, CA, substantial damage. Probable cause: The pilot’s failure to extend the landing gear before landing due to distraction and his failure to conduct the before landing checklist. - [NTSB WPR26LA083](https://openairdocs.org/ntsb/WPR26LA083), Jan 19, 2026: Robinson R44 (N996NR), Parkman, WY, substantial damage. Probable cause: The pilots’ failure to maintain separation while conducting air work in a common operational area. Contributing to the accident was the pilots’ divided attention associated with the mission activity… - [NTSB WPR26LA059](https://openairdocs.org/ntsb/WPR26LA059), Dec 14, 2025: Waco RNF (N110Y), Phoenix, AZ, substantial damage. Probable cause: The biplane pilot’s failure to maintain adequate clearance from the low-wing airplane while taxiing. - [NTSB ERA26LA025](https://openairdocs.org/ntsb/ERA26LA025), Oct 28, 2025: Akrotech Giles G-202 (N202RD), Boca Raton, FL, substantial damage. Probable cause: The low-wing pilot’s inadequate visual lookout, which resulted in a collision with another airplane while taxiing. - [NTSB ERA25LA356](https://openairdocs.org/ntsb/ERA25LA356), Sep 19, 2025: Cessna 182 (N2383X), Plymouth, MA, substantial damage. Probable cause: The low wing airplane pilot’s failure to maintain an adequate visual lookout and his decision to activate the portable ADS-B receiver while taxiing, which resulted in a ground collision. - [NTSB ERA25LA331](https://openairdocs.org/ntsb/ERA25LA331), Aug 30, 2025: Cessna 150 (N22998), Farmingdale, NY, minor damage. Probable cause: The Cessna 150 pilot’s decision to taxi in front of an oncoming Cessna 172, which resulted in a ground collision. Contributing to the accident was the Cessna 150 pilot’s momentary distraction, which… - [NTSB WPR25LA219](https://openairdocs.org/ntsb/WPR25LA219), Jul 19, 2025: Cirrus Design SR22 (N551SG), Hollister, CA, substantial damage. Probable cause: The departing pilot’s failure to see and avoid the landing airplane during the takeoff, which resulted in a mid-air collision. - [NTSB CEN25LA132](https://openairdocs.org/ntsb/CEN25LA132), Mar 22, 2025: Taylorcraft BC12 (N39158), Russellville, AR, substantial damage. Probable cause: The failure of the U.S. Army helicopter pilots to yield the right-of-way to the landing airplane, which resulted in the airplane encountering wake turbulence emitted from the three departing U.S.… - [NTSB CEN25LA133](https://openairdocs.org/ntsb/CEN25LA133), Mar 20, 2025: Piper PA-28R-201T (N38871), Liberal, KS, substantial damage. Probable cause: The pilot’s failure to extend the landing gear before landing due to distraction and his failure to conduct the prelanding checklist. - [NTSB ERA25LA129](https://openairdocs.org/ntsb/ERA25LA129), Feb 17, 2025: Eurocopter Deutschland EC135T2 (N405TJ), Philadelphia, PA, substantial damage. Probable cause: The sUAS operator’s failure to see and avoid a helicopter, resulting in a midair collision between the helicopter and the sUAS. 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.