# Near midair/TCAS alert/loss of separation

- Type: NTSB defining event
- NTSB code: 260
- CICTT category: Midair
- Defining event in: 92 cases
- In the sequence of: 96 cases
- Fatal cases: 0
- All cases: https://openairdocs.org/ntsb-events/260/cases.md
- Cases with it anywhere in the sequence: https://openairdocs.org/ntsb-events/260/sequence.md
- Page: https://openairdocs.org/ntsb-events/260

## Cases per year (defining / in the sequence)

- 2008: 3 / 3
- 2009: 1 / 1
- 2010: 7 / 8
- 2011: 7 / 7
- 2012: 1 / 1
- 2014: 2 / 2
- 2015: 2 / 2
- 2016: 1 / 2
- 2017: 4 / 4
- 2018: 5 / 6
- 2021: 4 / 5
- 2022: 7 / 7
- 2023: 6 / 6
- 2024: 18 / 18
- 2025: 15 / 15
- 2026: 9 / 9

## Phase of flight

- Enroute: 16 cases
- Approach: 14 cases
- Initial climb: 12 cases
- Enroute-descent: 9 cases
- Enroute-cruise: 9 cases
- Approach-IFR final approach: 8 cases
- Enroute-climb to cruise: 6 cases
- Unknown: 4 cases
- Landing: 4 cases
- Approach-IFR missed approach: 4 cases

## In the probable cause of these cases

- [Identification/recognition](https://openairdocs.org/ntsb-findings/02041510) (Personnel issues): 9 cases
- [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 8 cases
- [Incorrect action performance](https://openairdocs.org/ntsb-findings/02041015) (Personnel issues): 6 cases
- [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 4 cases
- [Adequacy of policy/proc](https://openairdocs.org/ntsb-findings/04021015) (Organizational issues): 3 cases
- [Task performance, general](https://openairdocs.org/ntsb-findings/02060000) (Personnel issues): 3 cases
- [Expectation/assumption](https://openairdocs.org/ntsb-findings/02041525) (Personnel issues): 3 cases
- [Incorrect action selection](https://openairdocs.org/ntsb-findings/02041010) (Personnel issues): 3 cases
- [Monitoring other aircraft](https://openairdocs.org/ntsb-findings/02021540) (Personnel issues): 3 cases
- [Oversight of personnel](https://openairdocs.org/ntsb-findings/04032010) (Organizational issues): 2 cases

## Aircraft models (registry)

- [Boeing 737-824](https://openairdocs.org/model/boeing-737-824): 3 cases
- [Cirrus Design SR22](https://openairdocs.org/model/cirrus-design-sr22): 2 cases
- [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4): 2 cases
- [Robinson Helicopter R44](https://openairdocs.org/model/robinson-helicopter-r44): 1 cases
- [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350): 1 cases
- [Learjet 45](https://openairdocs.org/model/learjet-45): 1 cases
- [Learjet 60](https://openairdocs.org/model/learjet-60): 1 cases
- [Gulfstream Aerospace G1159B](https://openairdocs.org/model/gulfstream-aerospace-g1159b): 1 cases
- [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214): 1 cases
- [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232): 1 cases

## Newest cases

- [NTSB OPS26LA063](https://openairdocs.org/ntsb/OPS26LA063), Aug 4, 2026: Sikorsky VH3D (MILITARY - VM1), Washington, DC, incident, no damage, investigation ongoing
- [NTSB DCA26WA284](https://openairdocs.org/ntsb/DCA26WA284), Jul 10, 2026: Airbus A321 (EC-OLE), San Andrés, Spain, incident
- [NTSB OPS26LA036](https://openairdocs.org/ntsb/OPS26LA036), Apr 8, 2026: Boeing 737-7CT (N566WN), Orlando, FL, incident, no damage, investigation ongoing
- [NTSB OPS26LA027](https://openairdocs.org/ntsb/OPS26LA027), Mar 18, 2026: Boeing 737-9 (N738AL), Newark, NJ, incident, no damage, investigation ongoing
- [NTSB DCA26WA158](https://openairdocs.org/ntsb/DCA26WA158), Feb 18, 2026: Boeing 737 (EI-DWT), Cologne, Germany, incident, no damage
- [NTSB OPS26LA019](https://openairdocs.org/ntsb/OPS26LA019), Feb 13, 2026: Learjet 45 (N91SU), West Milford, NJ, incident, no damage, investigation ongoing
- [NTSB DCA26WA143](https://openairdocs.org/ntsb/DCA26WA143), Feb 12, 2026: Bombardier CL-600-2D24 (N589NN), Exhuma, Bahamas, incident, no damage
- [NTSB GAA26WA099](https://openairdocs.org/ntsb/GAA26WA099), Jan 22, 2026: Cirrus SR22 (VH-XC5), Tarrengower, Australia, occurrence, no damage
- [NTSB GAA26WA098](https://openairdocs.org/ntsb/GAA26WA098), Jan 18, 2026: Bell 212 (VH-KHO), Mt Hotham Aerodrome, Australia, incident, no damage
- [NTSB DCA26WA025](https://openairdocs.org/ntsb/DCA26WA025), Oct 23, 2025: Airbus A321 (OE-ISB), Amsterdam, Netherlands, incident, no damage

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.

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