NTSB investigations
29 cases where NTSB found Hydraulic, main system.
Cases per year
| 2008 | 1 |
|---|---|
| 2009 | 2 |
| 2010 | 2 |
| 2011 | 2 |
| 2012 | 3 |
| 2014 | 5 |
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 2 |
| 2024 | 1 |
| 2026 | 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\", '01022910')) 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", '01022910')) 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 WPR26LA343Accident · No injuriesClass 4 · LimitedFinal reportAerovodochody L-29 Delfin · Roswell, NMThe malfunction of a diode in the airplanes electrical system that resulted in low batter power and subsequent landing gear collapse.NTSB DCA26LA151Accident · No injuriesClass 4 · LimitedFinal reportFairchild SA227-AC · Denver, COThe overstress failure of the left main landing gear lower drag brace links during takeoff which resulted in a runway excursion during landing due to the left main landing gear collapsing.NTSB DCA24LA095Incident · No injuriesClass 2 · LimitedFinal reportBoeing 737-823 · Dallas, TXImproper maintenance due to human error during a braking system modification diminished braking performance. Contributing to the diminished braking performance was the lack of a functional check to verify the flexible hydraulic hoses and transducer wiring…NTSB DCA24FA002Accident · No injuriesClass 2 · FieldFinal reportBoeing 757-236 · Chattanooga, TNThe failure of the alternate gear extension system, which prevented the landing gear from being lowered. The cause of the system failure was a broken wire, due to tensile overload, between the alternate gear extend switch and the alternate extension power…NTSB ERA23LA202Accident · No injuriesClass 3 · LimitedFinal reportRockwell International 112 · Miami, FLFailure of the right main landing gear due to inadequate hydraulic pressure as result of a torn O-ring that was installed on the hydraulic pack’s check valve during overhaul.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 DCA21LA229Accident · Serious injuriesClass 4 · LimitedFinal reportBoeing 767-332 · Seattle, WAThe flightcrew’s failure to set the hydraulic panel correctly during the execution of the pushback checklist, and when the hydraulic panel setting was corrected, that resulted in the airplane coming to a sudden stop and a flight attendant receiving a serious…NTSB WPR20LA280Accident · 1 fatalClass 3 · LimitedFinal reportArrow-Falcon Exporters UH-1H · Coalinga, CAThe pilot’s inability to maintain control of the helicopter due to a hydraulic system failure for reasons that could not be fully determined due to the thermal destruction from the postimpact fire.NTSB CEN19LA246Accident · No injuriesClass 3 · LimitedFinal reportSwearingen SA227 · El Paso, TXFailure of the left main landing gear to fully extend due to a lack of hydraulic fluid and during emergency extension procedures, which resulted in the collapse of the landing gear during landing and the subsequent runway excursion and collision with a sign.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 GAA17CA570Accident · No injuriesData collectionFinal reportPiper PA 31 · SaipanImpact with multiple birds while retracting the landing gear, which resulted in the subsequent failure of the right inboard main landing gear door actuator hose and prevented the pilot from being able to extend the landing gear.NTSB WPR17LA165Accident · No injuriesClass 3 · LimitedFinal reportLake LA 4 · Byron, CAThe pilot’s failure to activate the hydraulic system during the approach, and his failure to ensure that the landing gear was down and locked before touchdown. Contributing to the accident was the pilot's decision to operate the airplane with an inoperative…NTSB WPR16LA187Accident · No injuriesLimited investigationFinal reportJurcan Seawind 3000 · Renton, WAThe failure of the landing gear system to either fully retract or extend due to a cracked hydraulic fitting flare, which resulted in the loss of hydraulic pressure.NTSB ERA15LA296Accident · No injuriesLimited investigationFinal reportBell 47G 3B 1 · Camden, ALA failure of the helicopter's hydraulic flight control systems for reasons that could not be determined due to the fire damage, and the pilot's inability to turn off the hydraulic system to relieve control pressure.NTSB CEN15IA014Incident · No injuriesIncident investigationFinal reportRaytheon Hawker · Denver, COThe failure of the main landing gear tire, which resulted in separation of the servo block and subsequent total loss of all hydraulic system pressure and prevented the landing gear from extending before landing.NTSB WPR14TA248Accident · No injuriesFinal reportLockheed SP 2H · Fresno, CAThe collapse of the nosewheel landing gear due to the disengagement of the nosewheel landing gear pin. Contributing to the accident was the failure of the main hydraulic system due to overpressurization for reasons that could not be determined during…NTSB WPR14FA137Accident · 2 fatalField investigationFinal reportEurocopter AS 350 B2 · Seattle, WAThe loss of helicopter control due to a loss of hydraulic boost to the tail rotor pedal controls at takeoff, followed by a loss of hydraulic boost to the main rotor controls after takeoff. The reason for the loss of hydraulic boost to the main and tail rotor…NTSB CEN14LA127Accident · No injuriesLimited investigationFinal reportPiaggio P180 - Avanti II · Springfield, ILThe pilot's decision to reengage the hydraulic system following the successful extension of the landing gear using the emergency extension procedures. Contributing to the accident was the failure of the directional control valve in the gear-up position and…NTSB WPR14LA105Accident · No injuriesLimited investigationFinal reportPiper PA 23-250 · Camarillo, CAThe inadequate hydraulic pressure due to a damaged O-ring in the hydraulic powerpack, which prevented the right main landing gear (MLG) downlock from locking in the extended positon and allowed the right MLG to collapse during landing.NTSB CEN12LA420Accident · No injuriesLimited investigationFinal reportCessna T210M · Colorado Springs, COThe failure of the right hydraulic main gear down-lock actuator hose in flight.NTSB DCA12IA096Incident · No injuriesIncident investigationFinal reportAirbus A320 · Las Vegas, NVthe failure of the right main landing gear door retraction flexible hydraulic line in the Green hydraulic system, which led to prolonged operation of the power transfer unit and subsequent overheating and loss of pressure in the Yellow hydraulic system,…NTSB ANC12LA017Accident · No injuriesLimited investigationFinal reportPzl-Swidnik SW-4 · Fairbanks, AKA loss of control during a simulated hydraulic emergency, which resulted in an inadvertent dynamic rollover from the which the pilot could not recover.NTSB ERA11WA472Accident · 4 fatalForeign investigationAgusta AW139 · BrazilOn August 19, 2011, at 1948 coordinated universal time (16:48 local time), an Agusta, AW139, helicopter, Brazilian registration PT-SEK, impacted into the Atlantic Ocean, near an oil rig, identifier P-65, the helicopter sank in waters with a recorded floor…NTSB CEN11FA359Accident · Minor injuriesField investigationFinal reportEurocopter AS 350 B2 · Fort Worth, TXThe pilot’s loss of control due to his not maintaining adequate airspeed and altitude during a simulated hydraulic flight control failure. Contributing to the accident was the flight instructor’s inadequate supervision and delayed remedial response.NTSB ERA10TA501Accident · Minor injuriesFinal reportEurocopter AS-350 · Covington, GAThe flight instructor's loss of control of the helicopter during the intentional demonstration of a low speed, hydraulics-off maneuver, that was warned against in the helicopter manufacturer's flight manual.NTSB CEN10TA355Accident · No injuriesFinal reportLockheed P2V-5 · Broomfield, COThe pilot’s failure to follow published emergency procedures by taxiing to the parking ramp with a known hydraulic system failure. Contributing to the accident was the co-pilot’s improper selection of the bypass position on the emergency nose gear extension…NTSB WPR09LA371Accident · No injuriesLimited investigationFinal reportSikorsky S-55 · Chelan, WAFailure of a seal in the hydraulic system resulting in a loss of hydraulic pressure while maneuvering at low altitude.NTSB CEN09CA343Accident · No injuriesData collectionFinal reportCessna 404 · Englewood, COThe failure of the landing gear to extend due to the failure of a hydraulic line.NTSB MIA08LA149Accident · No injuriesLimited investigationFinal reportAero Commander 500-B · Charlotte AmaliThe failure of maintenance personnel to identify inadequate clamping of the aluminum line during inspection, and the undetected fatigue cracking of the line which resulted in the loss of hydraulic fluid.