NTSB investigations
33 cases where NTSB found Hydraulic fluid.
Cases per year
| 2008 | 3 |
|---|---|
| 2009 | 2 |
| 2010 | 3 |
| 2011 | 2 |
| 2012 | 2 |
| 2013 | 3 |
| 2015 | 1 |
| 2016 | 2 |
| 2018 | 5 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 1 |
| 2025 | 2 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c.\"mKey\" AND a.position = 1 WHERE c.\"mKey\" IN (SELECT f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f.\"findingCode\", '01071015')) ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"
Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1 WHERE c."mKey" IN (SELECT f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '01071015')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB ERA25LA314Accident · No injuriesClass 4 · LimitedFinal reportPiper PA32R · Miami, FLAn inflight loss of hydraulic fluid from the landing gear system through a cracked fitting, which resulted in a landing gear collapse upon touchdown.NTSB WPR25LA178Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-28R-200 · Vancouver, WAA failure of the brake system during landing due to a hydraulic fluid leak, which resulted in a runway excursion.NTSB ERA24LA051Accident · No injuriesClass 3 · LimitedFinal reportLancair 235 · Stuart, FLA landing gear collapse due to a hydraulic fluid leak in the landing gear system.NTSB WPR23LA076Accident · No injuriesClass 3 · LimitedFinal reportCessna 210N · Morgan, UTFailure of the brake system O-rings on the left landing gear trunnion, which allowed the hydraulic fluid to drain from the left brake system, resulting in a runway excursion and impact with a fence.NTSB WPR22LA341Accident · No injuriesClass 3 · LimitedFinal reportCessna 750 · Mesa, AZThe pilot’s improper decision to depart on the accident flight with a known hydraulic leak, resulting in an in-flight hydraulic system failure, and the pilot’s attempt to land during an unstabilized approach, which resulted in a loss of control during the…NTSB WPR21LA362Accident · No injuriesClass 3 · LimitedFinal reportMaule MX-7-235 · Ontario, ORA loss of hydraulic fluid and failure of the right brake for reasons that could not be determined due to a lack of available evidence.NTSB WPR20LA172Accident · No injuriesClass 3 · LimitedFinal reportAyres S2R · Imperial, CAThe pilot's loss of control during a landing roll due to a failure of the main O-ring in the right brake assembly, which resulted in a loss of brake pressure and subsequent brake failure.NTSB WPR20LA104Accident · No injuriesClass 3 · LimitedFinal reportPiper PA46 · San Jose, CAThe failure to properly service the hydraulic power pack prevented a normal landing gear extension. Contributing to the accident was the failure of the landing gear emergency release valve to function properly for reasons that could not be determined based on…NTSB ANC20LA013Accident · No injuriesClass 3 · LimitedFinal reportPiper PA31 · Fairbanks, AKThe improper installation of a hydraulic line at the right main landing gear (MLG) unlock actuator, which resulted in a total loss of system hydraulic pressure and failure of the landing gear to extend. Contributing to the accident was the failure of the…NTSB ERA19LA239Accident · No injuriesClass 3 · LimitedFinal reportCessna 210 · Chattanooga, TNThe improper maintenance of the airplane’s landing gear system, which resulted in a hydraulic fluid leak and insufficient pressure to extend and lock the landing gear during the accident flight.NTSB CEN18LA349Accident · Serious injuriesLimited investigationFinal reportNorth American T-28B · Minneapolis, MNThe fire during approach for reasons that could not be determined based on the available evidence, which resulted in impact with terrain during approach for a precautionary landing.NTSB ANC18LA043Accident · No injuriesClass 3 · LimitedFinal reportCessna 210 · Ramona, CAThe failure of the engine-driven hydraulic pump due to the installation of improper cap screws, which resulted in a gap in the pump housing, a subsequent hydraulic leak, and the landing gear collapsing.NTSB ERA18LA176Accident · No injuriesLimited investigationFinal reportCessna 337 · Atlanta, GAAn area of pitting and corrosion on the surface of the aluminum hydraulic line connecting the emergency handle/pump to the electric hydraulic pump, which resulted in a loss of hydraulic pressure and the pilot’s inability to extend the landing gear.NTSB ERA18LA067Accident · No injuriesLimited investigationFinal reportCessna 172RG · Martinsburg, WVA hydraulic leak in the right main landing gear actuator, which resulted in the main landing gear not extending.NTSB ANC18LA019Accident · No injuriesClass 3 · LimitedFinal reportCessna 210 · Juneau, AKA loss of hydraulic fluid due to a fatigue failure of the right main landing gear hydraulic actuator, which resulted in the pilot's inability to fully extend the landing gear and a main landing gear collapse during the landing roll.NTSB ANC17LA005Accident · No injuriesLimited investigationFinal reportCessna A185 · Ninilchik, AKA loss of brake system fluid due to leaks in the o-rings, which resulted in asymmetrical braking and a subsequent loss of directional control during the landing roll.NTSB CEN17LA022Accident · No injuriesLimited investigationFinal reportCessna T210L · Pflugerville, TXLanding gear collapse upon landing due to a hydraulic leak that led to insufficient pressure to fully extend and lock the gear in a down position.NTSB ANC15LA048Accident · No injuriesLimited investigationFinal reportCessna 210 · Juneau, AKA loss of hydraulic fluid due to a fractured left main landing gear hydraulic actuator as a result of a fatigue crack, which led to the landing gear collapsing upon touchdown.NTSB CEN13FA415Accident · 1 fatalField investigationFinal reportBell UH-1H · Dove Creek, COPilot-induced oscillations caused by the loss of hydraulic assist of the flight controls due to an excessive loss of hydraulic fluid during a critical phase of flight, which resulted in ground impact. Contributing to the accident was an inadequate analysis of…NTSB WPR13LA322Accident · No injuriesLimited investigationFinal reportPiper PA-28-235 · Albany, ORThe loss of hydraulic fluid, which rendered the brakes ineffective. The reason for the loss of hydraulic fluid could not be determined based on the available evidence.NTSB WPR13LA274Accident · No injuriesLimited investigationFinal reportCessna T210L · Fresno, CAA hydraulic fluid leak in the nose landing gear actuator rod seal, which prevented the hydraulic system from building up sufficient pressure to fully retract or extend the main landing gear.NTSB ERA13LA058Accident · No injuriesLimited investigationFinal reportCessna 172RG · Lexington, KYThe rupture of the landing gear’s hydraulic pressure hose, which resulted in the depletion of all of the hydraulic fluid, and the inability of the landing gear to raise or lower. Contributing to the accident was the installation of an unapproved hydraulic…NTSB WPR12LA430Accident · Minor injuriesLimited investigationFinal reportCessna 150F · Snohomish, WAThe failure of the right wheel brake hydraulic line during the landing roll, which rendered the brake system inoperative.NTSB CEN11IA379Incident · No injuriesIncident investigationFinal reportBombardier CL-600-2B19 · Milwaukee, WIThe failure of the right main landing gear (MLG) to extend normally, which resulted from the combination of a slightly worn uplock pin, the operation of the hydraulic pumps below their specified operating pressures, and contamination within the landing gear…NTSB CEN11FA193Accident · No injuriesField investigationFinal reportGulfstream Aerospace GV-SP · Appleton, WIThe pilot flying's (PF) decision to land on a shorter-than-recommended runway with a known left hydraulic system failure rather than go around as suggested by the pilot-not-flying, his failure to immediately apply emergency brakes following the detection of…NTSB ERA11LA011Accident · No injuriesLimited investigationFinal reportGrumman G164 · Edison, GALeakage of hydraulic fluid from the internal fuselage line fitting, resulting in a subsequent loss of the right brake’s effectiveness.NTSB CEN10LA389Accident · No injuriesLimited investigationFinal reportCessna 210 · Houston, TXThe failure of a hydraulic fluid line, which caused a loss of hydraulic pressure to the landing gear extension system and resulted in the partial collapse of the right main landing gear during touchdown.NTSB WPR10LA319Accident · No injuriesLimited investigationFinal reportPridmore Lancair IV · Caldwell, IDThe failure of maintenance personnel to ensure that a hydraulic line fitting was adequately secured during a conditional inspection, which resulted in a leak and subsequent on-ground fire.NTSB CEN09IA618Incident · No injuriesIncident investigationFinal reportBell 230 · Peoria, ILThe loss of the number one hydraulic system fluid and hydraulic pressure during cruise due to the failure of the bolts that secure the hydraulic pump's cover.NTSB ERA09IA338Incident · No injuriesIncident investigationFinal reportBombardier CL-600-2B1 · Atlanta, GAThe failure of the left main landing gear to extend due to high levels of particulate contamination in the hydraulic fluid.NTSB WPR09CA017Accident · No injuriesData collectionFinal reportPiper L-4 · Buckeye, AZAnother airplanes total loss of wheel brakes while taxing which resulted in the pilot of the other aircraft colliding with a standing aircraft. Contributing to the accident was the other airplanes low brake hydraulic fluid.NTSB NYC08LA273Accident · No injuriesLimited investigationFinal reportOuzts Rodney Rutan-LongEZ · Winder, GAThe failure of the left brake due to contamination of the brake fluid.NTSB MIA08LA053Accident · No injuriesLimited investigationFinal reportCessna C-172RG · Chamblee, GAA cracked nose gear actuator o-ring resulting in hydraulic fluid exhaustion, and collapse of the main gear.