# Aircraft systems

- Type: NTSB finding subcategory
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › Aircraft systems
- NTSB code: 0102
- Cases: 3618
- In the probable cause: 3197
- Fatal cases: 388
- All cases: https://openairdocs.org/ntsb-findings/0102/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/0102/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/0102

## Cases per year (in the probable cause / all)

- 2008: 222 / 286
- 2009: 195 / 222
- 2010: 181 / 215
- 2011: 207 / 232
- 2012: 218 / 239
- 2013: 171 / 198
- 2014: 153 / 174
- 2015: 157 / 178
- 2016: 178 / 195
- 2017: 177 / 193
- 2018: 180 / 203
- 2019: 187 / 196
- 2020: 147 / 163
- 2021: 155 / 181
- 2022: 153 / 171
- 2023: 171 / 200
- 2024: 180 / 195
- 2025: 119 / 130
- 2026: 46 / 47

## Sections

- [Landing gear system](https://openairdocs.org/ntsb-findings/010232): 1,783 cases, 1,579 in the probable cause
- [Fuel system](https://openairdocs.org/ntsb-findings/010228): 734 cases, 672 in the probable cause
- [Flight control system](https://openairdocs.org/ntsb-findings/010227): 459 cases, 410 in the probable cause
- [Electrical power system](https://openairdocs.org/ntsb-findings/010224): 183 cases, 157 in the probable cause
- [Ice/rain protection system](https://openairdocs.org/ntsb-findings/010230): 127 cases, 118 in the probable cause
- [Equipment/furnishings](https://openairdocs.org/ntsb-findings/010225): 125 cases, 85 in the probable cause
- [Indicating/recording systems](https://openairdocs.org/ntsb-findings/010231): 79 cases, 48 in the probable cause
- [Hydraulic power system](https://openairdocs.org/ntsb-findings/010229): 65 cases, 56 in the probable cause
- [Aircraft systems, general](https://openairdocs.org/ntsb-findings/010200): 63 cases, 50 in the probable cause
- [Navigation system](https://openairdocs.org/ntsb-findings/010234): 54 cases, 36 in the probable cause
- [Auto flight system](https://openairdocs.org/ntsb-findings/010222): 42 cases, 32 in the probable cause
- [Communications system](https://openairdocs.org/ntsb-findings/010223): 18 cases, 13 in the probable cause
- [Lighting system](https://openairdocs.org/ntsb-findings/010233): 16 cases, 13 in the probable cause
- [Vacuum system](https://openairdocs.org/ntsb-findings/010237): 15 cases, 12 in the probable cause
- [Air conditioning system](https://openairdocs.org/ntsb-findings/010221): 14 cases, 12 in the probable cause
- [Oxygen system](https://openairdocs.org/ntsb-findings/010235): 8 cases, 6 in the probable cause
- [Fire protection system](https://openairdocs.org/ntsb-findings/010226): 6 cases, 3 in the probable cause
- [Pneumatic system](https://openairdocs.org/ntsb-findings/010236): 5 cases, 5 in the probable cause
- [Water and waste system](https://openairdocs.org/ntsb-findings/010238): 2 cases, 2 in the probable cause
- [Airborne APU system](https://openairdocs.org/ntsb-findings/010249): 1 cases, 0 in the probable cause

## Defining events in these cases

- [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 413 cases
- [Landing gear collapse](https://openairdocs.org/ntsb-events/094): 364 cases
- [Landing gear not configured](https://openairdocs.org/ntsb-events/095): 356 cases
- [Loss of control on ground](https://openairdocs.org/ntsb-events/230): 344 cases
- [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 261 cases
- [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 231 cases
- [Fuel starvation](https://openairdocs.org/ntsb-events/191): 226 cases
- [Flight control sys malf/fail](https://openairdocs.org/ntsb-events/333): 163 cases
- [Nose over/nose down](https://openairdocs.org/ntsb-events/096): 118 cases
- [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 97 cases

## Aircraft models (registry)

- [Beech A36](https://openairdocs.org/model/beech-a36): 32 cases
- [Piper PA-30](https://openairdocs.org/model/piper-pa-30): 31 cases
- [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150): 31 cases
- [Piper PA-24-250](https://openairdocs.org/model/piper-pa-24-250): 28 cases
- [Cessna 172RG](https://openairdocs.org/model/cessna-172rg): 26 cases
- [Cessna P210N](https://openairdocs.org/model/cessna-p210n): 25 cases
- [Cirrus Design SR22](https://openairdocs.org/model/cirrus-design-sr22): 24 cases
- [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140): 23 cases
- [Cessna A185F](https://openairdocs.org/model/cessna-a185f): 23 cases
- [Cessna R182](https://openairdocs.org/model/cessna-r182): 23 cases

## Other findings in the same cases

- [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 599 cases
- [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 496 cases
- [Directional control](https://openairdocs.org/ntsb-findings/01062020) (Aircraft): 395 cases
- [Fuel](https://openairdocs.org/ntsb-findings/01071010) (Aircraft): 321 cases
- [Forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035) (Personnel issues): 286 cases
- [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 277 cases
- [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 209 cases
- [Incorrect action performance](https://openairdocs.org/ntsb-findings/02041015) (Personnel issues): 200 cases
- [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 190 cases
- [Use of checklist](https://openairdocs.org/ntsb-findings/02063030) (Personnel issues): 189 cases

## Newest cases

- [NTSB CEN26LA278](https://openairdocs.org/ntsb/CEN26LA278), Aug 1, 2026: Cessna 310 (N3618G), North Little Rock, AR, substantial damage. Probable cause: The flight instructor and pilot receiving instruction’s failure to verify that the landing gear was extended before landing, which resulted in a gear-up landing.
- [NTSB ERA26LA280](https://openairdocs.org/ntsb/ERA26LA280), Jul 24, 2026: Waco ASO (N119Y), Hamilton, OH, substantial damage. Probable cause: The separation of the right main landing gear axle, which resulted in a loss of control during the landing roll.
- [NTSB WPR26LA240](https://openairdocs.org/ntsb/WPR26LA240), Jun 27, 2026: Bellanca 17-30A (N501CR), Santa Paula, CA, substantial damage. Probable cause: The pilot’s improper fuel management, which resulted in fuel starvation and a loss of engine power.
- [NTSB ERA26LA265](https://openairdocs.org/ntsb/ERA26LA265), Jun 27, 2026: Beech E35 (N3272C), Lincoln, AL, substantial damage. Probable cause: The pilot’s failure to ensure that the landing gear were extended prior to landing.
- [NTSB CEN26LA240](https://openairdocs.org/ntsb/CEN26LA240), Jun 24, 2026: Beech 58 (N96GB), Traverse City, MI, substantial damage. Probable cause: The pilot’s failure to extend the landing gear before landing.
- [NTSB CEN26LA236](https://openairdocs.org/ntsb/CEN26LA236), Jun 24, 2026: Beech C24R (N6164C), Baton Rouge, LA, substantial damage. Probable cause: The pilot’s failure to extend the landing gear before landing.
- [NTSB CEN26LA232](https://openairdocs.org/ntsb/CEN26LA232), Jun 23, 2026: Rocky Mountain Kitplanes S-6S (N164GR), Marvel, AR, substantial damage. Probable cause: A partial blockage of the pitot static system that precluded the airspeed indicator from displaying the correct airspeed which led to the faster landing speed and bounced landing.
- [NTSB CEN26LA226](https://openairdocs.org/ntsb/CEN26LA226), Jun 14, 2026: Beech A36TC (N3701N), Kingsford, MI, substantial damage. Probable cause: The pin on the nose gear brace assembly that engages with the cam on the nose landing gear door actuator shaft was not seated inside the cam, which rendered the nose landing gear inoperative.
- [NTSB WPR26LA210](https://openairdocs.org/ntsb/WPR26LA210), Jun 3, 2026: Cessna P210 (N4875K), Salem, OR, substantial damage. Probable cause: The pilot’s failure to extend the landing gear prior to landing.
- [NTSB ERA26LA318](https://openairdocs.org/ntsb/ERA26LA318), May 30, 2026: Cessna 140 (N77061), Homestead, FL, substantial damage. Probable cause: The pilot’s excessive braking during the landing roll, which resulted in a nose over.

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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