# Sys/Comp malf/fail (non-power)

- Type: NTSB defining event
- NTSB code: 330
- CICTT category: System/Component Failure (Non-Powerplant)
- Defining event in: 725 cases
- In the sequence of: 994 cases
- Fatal cases: 37
- All cases: https://openairdocs.org/ntsb-events/330/cases.md
- Cases with it anywhere in the sequence: https://openairdocs.org/ntsb-events/330/sequence.md
- Page: https://openairdocs.org/ntsb-events/330

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

- 1979: 1 / 1
- 2008: 61 / 100
- 2009: 43 / 77
- 2010: 38 / 54
- 2011: 42 / 64
- 2012: 41 / 58
- 2013: 37 / 49
- 2014: 19 / 28
- 2015: 35 / 43
- 2016: 27 / 40
- 2017: 25 / 42
- 2018: 28 / 35
- 2019: 24 / 34
- 2020: 30 / 39
- 2021: 43 / 56
- 2022: 53 / 61
- 2023: 53 / 66
- 2024: 52 / 62
- 2025: 47 / 53
- 2026: 26 / 32

## Phase of flight

- Landing-landing roll: 151 cases
- Takeoff: 78 cases
- Landing: 67 cases
- Enroute-cruise: 61 cases
- Approach: 58 cases
- Initial climb: 58 cases
- Enroute: 43 cases
- Landing-flare/touchdown: 26 cases
- Maneuvering: 26 cases
- Maneuvering-low-alt flying: 24 cases

## In the probable cause of these cases

- [Directional control](https://openairdocs.org/ntsb-findings/01062020) (Aircraft): 73 cases
- [Gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230) (Aircraft): 51 cases
- [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 48 cases
- [Brake](https://openairdocs.org/ntsb-findings/01023242) (Aircraft): 42 cases
- [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 37 cases
- [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 35 cases
- [Main landing gear](https://openairdocs.org/ntsb-findings/01023210) (Aircraft): 33 cases
- [Nose/tail landing gear](https://openairdocs.org/ntsb-findings/01023220) (Aircraft): 32 cases
- [Installation](https://openairdocs.org/ntsb-findings/02062035) (Personnel issues): 27 cases
- [Landing gear actuator](https://openairdocs.org/ntsb-findings/01023233) (Aircraft): 26 cases

## Aircraft models (registry)

- [Robinson Helicopter R44 II](https://openairdocs.org/model/robinson-helicopter-r44-ii): 9 cases
- [Cessna 172RG](https://openairdocs.org/model/cessna-172rg): 9 cases
- [Cessna A185F](https://openairdocs.org/model/cessna-a185f): 8 cases
- [Cessna 402C](https://openairdocs.org/model/cessna-402c): 6 cases
- [Cessna 180](https://openairdocs.org/model/cessna-180): 6 cases
- [Bell 206B](https://openairdocs.org/model/bell-206b): 6 cases
- [Robinson Helicopter R44](https://openairdocs.org/model/robinson-helicopter-r44): 5 cases
- [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta): 5 cases
- [Piper PA-30](https://openairdocs.org/model/piper-pa-30): 5 cases
- [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e): 5 cases

## Newest cases

- [NTSB ERA27LA013](https://openairdocs.org/ntsb/ERA27LA013), Oct 15, 2026: Hughes 269C (N9655F), Gastonia, NC, investigation ongoing
- [NTSB DCA26WA365](https://openairdocs.org/ntsb/DCA26WA365), Sep 17, 2026: Boeing 737 (XA-GNS), Comalapa, El Salvador, incident
- [NTSB DCA26WA353](https://openairdocs.org/ntsb/DCA26WA353), Sep 8, 2026: Douglas DC8 (9S-AJO), Kinshasa, Congo - Kinshasa
- [NTSB WPR26LA367](https://openairdocs.org/ntsb/WPR26LA367), Aug 30, 2026: Hawker Beechcraft G36 (N646MM), Murrieta, CA, investigation ongoing
- [NTSB WPR26LA321](https://openairdocs.org/ntsb/WPR26LA321), Aug 28, 2026: Westwind 1124A (C-GIAW), Las Vegas, NV, substantial damage, investigation ongoing
- [NTSB CEN26LA270](https://openairdocs.org/ntsb/CEN26LA270), Jul 23, 2026: Cessna P210R (N5258A), Arkadelphia, AR, substantial damage, investigation ongoing
- [NTSB CEN26LA259](https://openairdocs.org/ntsb/CEN26LA259), Jul 18, 2026: Robinson Helicopter R44 (N484AT), Adair, IA, substantial damage, investigation ongoing
- [NTSB CEN26LA251](https://openairdocs.org/ntsb/CEN26LA251), Jul 10, 2026: Vans RV-12 (N812MM), Grand Junction, CO, substantial damage, investigation ongoing
- [NTSB WPR26LA227](https://openairdocs.org/ntsb/WPR26LA227), Jun 21, 2026: Emigh Trojan A2 (N8329H), Healdsburg, CA, substantial damage, investigation ongoing
- [NTSB CEN26LA230](https://openairdocs.org/ntsb/CEN26LA230), Jun 20, 2026: Zenith 601 XL (N165TJ), O'Donnell, TX, substantial damage, investigation ongoing

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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