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 FTW92LA159Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Danbury, TXThe failure of the landing gear skid due to internal corrosion. A factor was the soft ground.NTSB BFO92LA062Accident · No injuriesLimited investigationFinal reportContinental Copters MK6B · Middleboro, MAThe pilot's failure to release a tie down strap from the helicopter's skid during the preflight.NTSB CHI92LA137Accident · Serious injuriesLimited investigationFinal reportBell 47-G2A · Dousman, WIThe in-flight loss of the swash plate drive link bolt which allowed the swash plate drive assembly to disconnect.NTSB FTW92LA044Accident · No injuriesLimited investigationFinal reportHiller-Osborn UH-12D · Rio Medina, TXThe pilot's improper flare during touchdown.NTSB MIA92WA037Accident · No injuriesForeign investigationBell-Transworld 47G2 · David, PanamaNTSB FTW91LA166Accident · Minor injuriesLimited investigationFinal reportBell 47G-5A · Pearsall, TXThe pilot's failure to maintain adequate visual lookout for obstacles during operations from a remote site.NTSB CHI91FA294Accident · 3 fatalField investigationFinal reportBell-K Copter 47D1 · Laurie, MOPoor judgement of the pilot, due to impairment from consumption of alcoholic beverage before flight, his intentional buzzing, and his inadequate visual lookout (failure to see-and-avoid power lines).NTSB MIA91LA215Accident · No injuriesLimited investigationFinal reportBell 47G2A · Immokalee, FLThe improper use of the flight controls by the pilot in command, which resulted in a collision with the ground and a nose over.NTSB LAX91LA369Accident · No injuriesLimited investigationFinal reportHiller UH12D · Sparks, NVThe encounter with rough, unsuitable terrain during a precautionary landing. Contributing to the accident was the pilot's decision to make an autorotation after encountering an airframe vibration.NTSB CHI91LA245Accident · Serious injuriesLimited investigationFinal reportHiller 1345 · Michigan City, INFuel exhaustion due the pilot's delay in refueling. Factors related to the accident were pressure induced by others (passenger), and the absence of suitable terrain.NTSB FTW91LA125Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Slidell, LAThe pilot performing a touchdown autorotation to unsuitable terrain. Factors were the soft terrain and the inadequate supervision by the FAA inspector.NTSB CHI91LA205Accident · No injuriesLimited investigationFinal reportHiller UH-12D · Savoy, ILThe pilot's failure to maintain tail rotor clearance from the ground. A related factor is the pilot's lack of total experience in helicopters.NTSB FTW91LA091Accident · No injuriesLimited investigationFinal reportBell 47D-1 · Peach Orchard, ARThe pilot's failure to maintain adequate main rotor RPM resulting in deteriorated helicopter performance. A factor was the tailwind condition.NTSB SEA91LA077Accident · No injuriesLimited investigationFinal reportBell BH-47G2A · Waitsburg, WAThe improper installation of the main rotor mast nut and lock washer by maintenance personnel which resulted in the separation of the main rotor system.NTSB MIA91TL#03Accident · No injuriesClass 3Final reportBell 47-G5A · Titusville, FLNTSB LAX91LA128Accident · No injuriesLimited investigationFinal reportBell 47G-5A · Farmington, CAThe contamination of the engine induction air filter. Soft terrain during the touchdown was a factor in the accident.NTSB LAX91LA013Accident · 2 fatalLimited investigationFinal reportBell 47G5 · AntarcticaThe pilot's failure to maintain on adequate altitude while maneuvering above the water.NTSB CHI90LA205Accident · No injuriesLimited investigationFinal reportBell 47G-5 · Hudson, IAImproper touchdown performed by the pilot in command.NTSB MKC90LA144Accident · Minor injuriesLimited investigationFinal reportBell 47D-1 · Fair Oaks, ARTail rotor cable disengagement due to inadequate maintenance.NTSB CHI90DEP07Accident · No injuriesFinal reportBell 47-G2 · Hatley, WIThe partial loss of power due to sticking intake valves.NTSB MKC90LA138Accident · No injuriesLimited investigationFinal reportHiller 12-E · Watson, MNPilot misjudged his flare and collided with the terrain.NTSB NYC90LA122Accident · No injuriesLimited investigationFinal reportBell 47G-3B1 · Becket, MAA power loss due to oil starvation, after maintenance personnel failed to comply with Lycoming directives during the engine overhaul. Factors related to the accident were: improper adjustment of the engine oil pressure by maintenance personnel and unsuitable…NTSB LAX90LA042Accident · Minor injuriesLimited investigationFinal reportBell 47G-II · Rialto, CAThe pilot's loss of directional control and subsequent overcontrol while hovering. Contributing to the accident were the gusty wind conditions and the pilot's inexperience.NTSB LAX90DVM01Accident · No injuriesFinal reportBell 47G-5 · Guadalupe, CAThe pilot's failure to maintain sufficient clearance allowing the aircraft to collide with a wooden power pole. Contributing to the accident was the sunglare which inhibited the pilot's vision.NTSB ATL90DKJ02Accident · No injuriesFinal reportBell 47G2 · Wettumpka, ALThe pilot's failure to avoid obstacles during aerial application maneuvering.NTSB MIA89LA240Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Cayey, PRLoss of engine power for an unknown reason. A factor related to the accident was: the presence of trees in the emergency landing area.NTSB MIA89LA221Accident · Serious injuriesLimited investigationFinal reportContinental Copters Tomcat MK6C · Quitman, MSFailure of the tail boom attachment.NTSB MIA89LA213Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Sarasota, FLThe student pilot's inadequate preflight planning/preparation, which resulted in fuel exhaustion due to an inadequate supply of fuel. Factors related to the accident were: the student pilot's lack of total experience & tree(s) in the emergency landing area.NTSB ATL89FA193Accident · 1 fatalField investigationFinal reportTexas Helicopter OH-13/M74 · Norman Park, GAImproper planning/decision by the pilot, which resulted in his physical impairment from exposure to lannate, and his failure to maintain altitude/clearance above the ground. A factor related to the accident was: failure of the pilot to use a respirator while…NTSB LAX89DVA07Accident · No injuriesFinal reportTexas Helicopter OH-13E/M74 · Hilmar, CAThe pilot's loss of directional control during an attempted takeoff from a loading platform.NTSB CHI89DEX05Accident · No injuriesFinal reportTexas Helicopter OH-13H/M74A · New Richmond, INThe pilot's misjudgement of the fuel supply which resulted in fuel exhaustion.NTSB BFO89LA049Accident · No injuriesLimited investigationFinal reportBell 47J · Fruitland, MDPoor judgement of the pilot by flying, while physically impaired by alcohol, and his misjudgement of clearance between the helicopter and the structure. The dark night and object (structure) were considered to be contributing factors.NTSB SEA89LA098Accident · Serious injuriesLimited investigationFinal reportBell 47G-2 · Buena, WAThe pilot's failure to maintain an adequate visual lookout and clearance to avoid the power lines.NTSB LAX88DUG07Accident · No injuriesFinal reportBell 47G-5A · Perris, CAOn liftoff, tail rotor control was lost and helicopter spun with main rotor striking terrain. Investigation revealed fatigue failure of engine mounting cage. The eng basket had failed and allowed the t/r drive shaft to pull out of the coupling. The basket had…NTSB LAX88DUQ04Accident · No injuriesFinal reportTexas Helicopter M74A · Lancaster, CADuring an aerial application flight, just after takeoff, the nose of the helicopter suddenly pitched up. The pilot reduced power to keep from climbing. The fore/aft cyclic control had no effect. The helicopter settled to the ground resulting in substantial…NTSB NYC88LA214Accident · Minor injuriesLimited investigationFinal reportBell 47G5 · Biddeford, METhe helicopter made an approach to a low hover above a hard surfaced rwy. The helicopter was slowly air taxiing when the plt felt the helicopter become unstable directionally and he considered making a run-on landing. However, before he could make the landing…NTSB MIA88LA250Accident · Minor injuriesLimited investigationFinal reportContinental Copters MK-5A · Valley Park, MSThe pilot stated that he thought he had 8 gallons of fuel prior to takeoff. The engine failed about 100 ft AGL and he attempted to stretch the glide of the helicopter by using collective pitch. The aircraft hit hard and rolled over. Only 1 quart of fuel was…NTSB CHI88DEX11Accident · 1 fatalFinal reportContinental Copters MK-5 · Redkey, INPhysical impairment of the pilot due to drugs which resulted in a misjudged approach and subsequent contact with trees during the approach to an aerial application swath run.NTSB CHI88DET05Accident · No injuriesFinal reportBell 47J · Dowagiac, MIFailure to maintian adequate rotor RPM by the unqualified pilot.NTSB CHI88DEX08Accident · No injuriesFinal reportContinental Copters Tomcat MK-6 · Straughn, INAerial application helicopter struck power lines in field on first swath run. This was the first time the pilot had sprayed this field. Prior to spraying the field he questioned the farmer regarding power lines or other obstructions. The farmer replied that…NTSB MIA88LA186Accident · No injuriesLimited investigationFinal reportContinental Copters MK6B · Callahan, FLWhile maneuvering the helicopter during an aerial application flt the eng quit. During the autorotative landing the helicopter landed hard. Examination of the eng revealed the accessory drive gear, which is attached to the crankshaft by 6 AN-4A bolts with the…NTSB CHI88DEM05Accident · No injuriesFinal reportBell 47G-2A · Midland, MIThe plt rprtd that before takeoff, he checked the fuel gage & concluded there was enough fuel to dispense his load. However, after spraying out the load, he started to return to the landing site & then the eng lost power from fuel exhaustion. The helicopter…NTSB MKC88LA092Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Mc Dougal, ARThe pilot stated that he had just begun the spraying of a rice field when one of the spray nozzles malfunctioned. As he was attempting to set the helicopter down on the ground, to work on the nozzle, the main rotor blades struck a tree. The main rotor blades…NTSB LAX88LA126Accident · Minor injuriesLimited investigationFinal reportBell 47G-2A-1 · Oceanside, CAThe non-U.S. Certificated pilot lost control of the helicopter while hovering 3-FT AGL during a maintenance test flight. The acft descended, touched down hard and rolled over. The non-english speaking pilot immediately departed the scene & reportedly headed…NTSB FTW88DRA03Accident · Serious injuriesFinal reportHiller UH-12-D · Bon-Wier, TXGround crewmember's failure to follow established procedures for secureing the aircraft to the transport trailer.NTSB SEA88LA014Accident · No injuriesLimited investigationFinal reportBell 47G2 · Lebanon, ORThe student was performing an autorotation at about 50' AGL and the flare was begun. The instructor pilot noticed that the helicopter was not leveling and took control of the aircraft. The helicopter settled tail low onto the soft ground striking the tail…NTSB FTW88LA008Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Lapra, TXUpon entering a bank approx. 80 to 100 ft. off the ground, the aircraft experienced a power loss with vibration. During autorotation the aircraft contacted a tree causing substantial damage. Examination of the wreckage found the transmission clutch assembly…NTSB FTW87DPJ09Accident · Serious injuriesFinal reportG&C Helicopters EL Tomcat MK5A · Marlow, OKPilot failed to see and avoid tree at end of swath run during a spraying operation. After contacting the tree, the helicopter started to spin and struck the ground in an approximate 90 degree right bank and started to burn.NTSB ATL87LA249Accident · No injuriesLimited investigationFinal reportBell 47G3B1 · Enterprise, ALDuring a practice autorotation, the instructor pilot delayed in appling power to arrest the autorotative descent. The other pilot reported that the autorotation profile was was not the same as the previous successful autorotation. There were no reported…NTSB MIA87FA236Accident · 1 fatalField investigationFinal reportCessna 152 · Opa Locka, FLA student plt & instructor (CFI) in Cessna 152, N48864, took off & entered rgt traffic to practice lndgs on rwy 9R. Soonthereafter, a helicopter plt (h/p) in a bell 47G-2, N6728D, took off & entered rgt traffic to practice lndgs in a desig-nated helicopter…