NTSB investigations: Lycoming VO-435 series
629 cases on aircraft whose registry engine model is Lycoming VO-435 series. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases, newest first
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 x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41525'))
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 x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41525'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun 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 CEN09LA324Accident · Serious injuriesLimited investigationFinal reportBell 47G · Kyle, TXThe ground crewmember's failure to assure that the fuel nozzle was closed before pressurizing the line. Contributing to the accident was the lack of an available fire extinguisher.NTSB CHI08CA019Accident · No injuriesData collectionFinal reportBell 47G-2A · Wautoma, WIThe pilot's failure to maintain control of the helicopter resulting from a distraction in the cockpit. A contributing factor was the distraction due to the dog in the cockpit.NTSB DFW07CA156Accident · Minor injuriesData collectionFinal reportBell 47G-2A · Mercedes, TXThe pilot's failure to maintain clearance from the power transmission line.NTSB CHI07CA212Accident · No injuriesData collectionFinal reportBell 47G-5 · Jesup, IAThe pilot's inability to maintain control of the helicopter when it unexpectedly encountered a whirlwind shortly after takeoff.NTSB ATL07LA052Accident · Minor injuriesLimited investigationFinal reportBell 47G2A · Huntsville, ALThe loss of engine power due to undetermined reasons.NTSB DEN06CA124Accident · No injuriesData collectionFinal reportBell 47G-2 · Hayden, ALengine fire for reasons undetermined.NTSB LAX06CA180Accident · No injuriesData collectionFinal reportBell 47-G5 · Soledad, CAfuel exhaustion due to the pilot's inaccurate fuel consumption calculations and failure to refuel the helicopter which resulted in a loss of engine power.NTSB DFW06CA123Accident · Minor injuriesData collectionFinal reportBell 47G-2 · Rosenberg, TXThe pilots encounter with loss of tail rotor effectiveness during an aerial application flight. A contributing factor was the gusty winds.NTSB NYC06FA100Accident · 2 fatalField investigationFinal reportBell 47G-3B-1 · East Hanover Tw, PAThe pilot's improper decision to hover out-of-ground-effect in a tailwind, and his failure to maintain aircraft control. A factor in the accident was the tailwind.NTSB ATL05CA161Accident · Minor injuriesData collectionFinal reportBell 47G-3B · Summerville, TNThe pilot's failure to maintain adequate clearance and adequate visual lookout during take-off which resulted in an in-flight collision with a tree and roll over.NTSB SEA05LA138Accident · No injuriesLimited investigationFinal reportBell 47G-2A · Oroville, WAThe failure of the throttle cable housing, which permitted the engine's RPM to decay to the idle position. Contributing factors were the trees and the lack of suitable terrain for a forced landing.NTSB DEN05CA078Accident · No injuriesData collectionFinal reportBell 47G-5A · Brush, COThe pilot's failure to maintain clearance from the truck trailer during takeoff. A factor contributing to this accident was the truck trailer.NTSB CHI05CA147Accident · Minor injuriesData collectionFinal reportBell 47G · Twin Brooks, SDThe pilot's inadequate lookout and his failure to maintain clearance with the power lines. A factor was the low altitude at which the helicopter was operating.NTSB CHI04CA229Accident · No injuriesData collectionFinal reportBell 47G2 · Muncie, INThe engine failure for an undetermined reason, and the pilot's inability to properly level-off for landing due to the low rotor speed, which resulted in the hard landing. The low altitude where the engine failure occurred was a factor.NTSB FTW04CA207Accident · No injuriesData collectionFinal reportBell 47G-3B-1 · Troy, TXThe flight instructor's improper flare, resulting in a hard landing. A contributing factor was the high density altitude.NTSB CHI04CA180Accident · No injuriesData collectionFinal reportTexas Helicopter M-74 · Clear Lake, MNThe pilot failed to maintain a proper glidepath to the landing zone. A factor was the truck pad.NTSB LAX04LA158Accident · No injuriesLimited investigationFinal reportQuinn E L Tom Cat MK-5A · Galt, CAa loss of engine power due to water contamination of the fuel system.NTSB MIA04FA008Accident · 2 fatalField investigationFinal reportBell 47G-2A-1 · Balm, FLThe pilot's intentional buzzing and his failure to maintain altitude/clearance which resulted in an in-flight collision with a building.NTSB LAX03CA285Accident · No injuriesData collectionFinal reportBell 47G-5 · Greenfield, CAthe pilot's failure to maintain clearance with the wires due to an inadequate visual lookout.NTSB CHI03FA277Accident · Serious injuriesField investigationFinal reportBell TH-13T · Light, ARThe total failure and seizure of the main rotor transmission while in cruise flight leading to the helicopter’s impact with terrain.NTSB NYC03CA170Accident · No injuriesData collectionFinal reportBell 47G-2A · Jackson, NJPilot's inadequate preflight inspection and failure to remove a pesticide spraying hose from the helicopter prior to takeoff, which resulted in a loss of control.NTSB LAX03LA236Accident · No injuriesLimited investigationFinal reportBell 47G-2A · Porterville, CAFatigue-induced failure of bolts in the helicopter's rotor drive flange, which resulted in a total loss of torque to the rotor drive shaft.NTSB CHI03LA210Accident · Serious injuriesLimited investigationFinal reportBell 47G-5 · Cleveland, MNThe pilot's inadequate visual lookout and low altitude flight when he failed to maintain altitude/clearance from the transmission wire. A factor contributing to the accident was the transmission wire.NTSB CHI03LA204Accident · No injuriesLimited investigationFinal reportContinental Copters MK6B · Ft. Yates, NDThe inadvertent settling with power and unsuccessful remedial action by the pilot. A factor to the accident was the potato crop.NTSB CHI03LA184Accident · No injuriesLimited investigationFinal reportBell 47G-5A · Sandusky, MIThe failure of the ignition switch leading to an engine power loss in cruise flight and the subsequent high flare during autorotation. Factors contributing to the accident were the pilot's misjudgment of the landing flare and the unsuitable terrain…NTSB ATL03LA007Accident · No injuriesLimited investigationFinal reportBell 47G3B1 · Highfalls, GAThe pilots inadequate fuel management, and subsequent loss of engine power due to fuel exhaustion, and a in-flight collision with trees during an autorotation. A factor was the pilot's failure to insure that the required equipment (fuel gauge) was installed…NTSB FTW02LA264Accident · 1 fatalLimited investigationFinal reportBell 47G-2 · Edmondson, ARThe pilot's failure to maintain clearance from the high voltage power lines.NTSB LAX02LA262Accident · Serious injuriesLimited investigationFinal reportBell 47G-2 · Oasis, CAthe pilot's failure to maintain an adequate visual lookout and clearance with power lines while maneuvering during an aerial application flight.NTSB FTW02LA216Accident · No injuriesLimited investigationFinal reportBell TH-13T · New Iberia, LAThe loss of engine power for undetermined reasons. High vegetation was a factor.NTSB LAX02LA218Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Compton, CAthe failure and separation of a fan belt for the engine cooling system. A factor in the accident was the inadequate annual inspection 14 hours prior to the accident.NTSB CHI02LA163Accident · Minor injuriesLimited investigationFinal reportBell 47G-2A-1 · Jordan, MNThe loss of engine power due to improper maintenance by unknown maintenance personnel which led to a misalignment of the gearbox casing.NTSB MIA02LA101Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Bunnell, FLThe failure of the student pilot to secure the rotorcraft floorboard mounted ballast, resulting in shifting of the ballast on liftoff, and the subsequent dynamic rollover.NTSB ATL02LA094Accident · No injuriesLimited investigationFinal reportBell 47G-5A · La Belle, FLThe pilot's failure to maintain clearance of a tree while maneuvering, which resulted in an in-flight collision with the tree and subsequent uncontrolled descent and collision with terrain.NTSB MIA02FA045Accident · 4 fatalField investigationFinal reportPiper PA-32-260 · Jacksonville, FLThe pilot becoming spatially disoriented and losing control of the airplane during a missed approach resulting in the airplane descending uncontrolled and colliding with trees and the ground.NTSB FTW01LA202Accident · Minor injuriesLimited investigationFinal reportHiller UH-12D · Lubbock, TXthe failure of the tail rotor drive shaft hanger bearing, which resulted in the separation of the tail rotor drive shaft. A contributing factor was the lack of suitable terrain for the forced landing.NTSB CHI01LA259Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Blooming Prairi, MNThe reported loss of engine power for undetermined reasons during a the cruise portion of a CFR part 137 observation, and the pilot not following the height/velocity charts data.NTSB ATL01LA075Accident · No injuriesLimited investigationFinal reportBell 47 · Indianola, MSThe pilot's improper use of flight controls during an autorotation that resulted inn the collapse of the skids and cross tube assembly. A factor was the loss of engine power due to the failure of # 1 connecting rod and the overload failure of the skids and…NTSB NYC01LA130Accident · No injuriesLimited investigationFinal reportContinental Copters Tom Cat Mark 5A · Benton, PAThe pilot's inadequate preflight inspection, which resulted in a takeoff with a hose still attached and a subsequent dynamic rollover.NTSB CHI00TA306Accident · Minor injuriesFinal reportBell 47G-5A · Economy, INThe pilot failed to maintain control of the helicopter while attempting a landing on unsuitable terrain. A factor associated with the accident was the grass covered, down slope in the terrain.NTSB LAX00LA280Accident · No injuriesLimited investigationFinal reportBell 47G-5 · King City, CAThe pilot's intentional flight into adverse weather which resulted in loss of visual reference and flight into power transmission wires and terrain.NTSB CHI00LA204Accident · Minor injuriesLimited investigationFinal reportBell 47G-3B-1 · Holstein, NEthe settling with power encountered by the pilot. A factor was the sudden windshift.NTSB MIA00LA176Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Fort Walton Bch, FLThe unsuitable terrain encountered by the pilot-in-command during the forced landing and the loss of engine power for undetermined reasons.NTSB LAX00LA124Accident · Minor injuriesLimited investigationFinal reportBell 47G · Vacaville, CAFailure of the pilot to see wires and maintain clearance while flying at a low altitude.NTSB LAX00LA100Accident · No injuriesLimited investigationFinal reportBell 47G5 · Riverbank, CAthe pilot's failure to verify that ground personnel had disconnected the loading hose from the hopper before takeoff, resulting in restricted directional control and a hard landing.NTSB ATL99FA132Accident · 2 fatalField investigationFinal reportContinental Copters Tomcat MK5A · Heflin, ALThe pilot of N9010T's failure to maintain visual lookout while maneuvering, resulting in a midair collision with N30899. A factor was the sun glare.NTSB SEA99LA149Accident · 1 fatalLimited investigationFinal reportBell 47G-2 · Benton City, WAA loss of power for undetermined reasons and the failure of the pilot to maintain adequate rotor RPM following the power loss. Contributing factors were the pilot's lack of certification and total experience.NTSB FTW99TA194Accident · No injuriesFinal reportBell 47G-3B-1 · Sour Lake, TXThe pilot's failure to adequately preflight the helicopter's fuel system resulting in the total loss of engine power as a result of water contamination. Factors were the incorrect filter installed on the fueling truck and the pilot's improper touchdown…NTSB ATL99LA107Accident · Minor injuriesLimited investigationFinal reportContinental Copters Tomcat MK5A · Camden, ALThe failure of the cyclic control rod due to an overstress separation resulting from a material defect (inadequate quality of material) by the manufacturer.NTSB LAX99LA081Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Lemoore, CAThe inadequate nature of the operator's maintenance, which failed to detect the primer and magneto discrepancies. An overly lean fuel mixture and/or magneto cross firing resulted in detonation, an ensuing connecting rod failure, and a total loss of engine…NTSB IAD99LA024Accident · Serious injuriesLimited investigationFinal reportBell 47-G5 · Essex Junction, VTthe pilot's improper entry into the autorotation, which resulted in the loss of power and a low rotor rpm condition. Also causal was the pilot's improper execution of the autorotation which resulted in the hard landing. Factors in the accident were the…