NTSB investigations: Hiller UH-12E
415 cases on aircraft the registry lists as Hiller UH-12E. 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.
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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.aircraft_model_code IN ('4360122', '4360137'))
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.aircraft_model_code IN ('4360122', '4360137'))
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 LAX00LA027Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Castroville, CAThe pilot's inadequate visual lookout and diverted attention.NTSB LAX99LA237Accident · No injuriesLimited investigationFinal reportHiller UH-12ET · Williams, CAThe pilot's inadequate preflight planning and verification that fuel was available for the intended flight. A factor was the fuel quantity false indication.NTSB SEA99FA037Accident · No injuriesField investigationFinal reportHiller UH-12E · Yellow Pine, IDAltitude deviation during aerial taxi for undetermined reasons.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 SEA99LA031Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Tensed, IDThe pilot-in-command's inadequate fuel management which resulted in fuel exhaustion. Contributing factors were the absence of cautionary markings on the fuel gauge, and high trees at the accident site.NTSB SEA99LA022Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Wenatchee, WAFuel exhaustion due to the pilot's failure to accomplish refueling.NTSB SEA99FA013Accident · 1 fatalField investigationFinal reportHiller UH-12E · Marshall, WAThe loss of the bolt that connects the lateral cyclic linkage push rod to the lower end of the upper firewall-mounted lateral cyclic linkage bellcrank, resulting in an uncontrolled descent into the terrain.NTSB CHI98LA312Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Shelton, NEThe pilot mismanaged the fuel which led to fuel starvation and subsequent loss of engine power.NTSB SEA98LA124Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Eltopia, WAFatigue of the control rotor blade spar and failure of the maintenance inspector to follow the procedures set forth in the airworthiness directive.NTSB CHI98LA218Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Park Rapids, MNthe pilot's failure to maintain control of aircraft. Factors were the congested helipad conditions and wind gusts.NTSB FTW98LA253Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Delaplaine, ARThe failure of maintenance personnel to comply with and airworthiness directive, which resulted in failure of the planetary gear due to lack of lubrication. A contributing factors was the lack of suitable terrain for the pilot to execute a forced landing.NTSB LAX98LA089Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Chico, CAFuel exhaustion due to the pilot's failure to ensure that an adequate fuel supply was onboard. A contributing factor was related to the fuel quantity gage's erroneous indication of fuel.NTSB CHI98LA012Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Liberty, NEA loss of engine power for undetermined reasons.NTSB NYC97LA101Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Granby, NYfailure of the pilot/owner to replace the torsional clutch as specified by the manufacturer, and subsequent failure of the helicopter's clutch, which resulted in a forced landing (autorotation). A related factor was: the encounter with trees in the emergency…NTSB SEA97LA117Accident · 1 fatalLimited investigationFinal reportHiller UH-12E · Miltonfreewater, ORThe main rotor blade separated due to fatigue. Factors were: an Airworthiness Directive was not properly performed, and inadequate inspection of the main rotor blades.NTSB LAX97LA179Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Truckee, CAA loss of engine power for undetermined reasons. A factor in the accident was the unsuccessful attempt to release the long line from the belly hook after it became entangled in a tree.NTSB FTW97LA131Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Donna, TXThe pilot's failure to maintain clearance with the power lines during an aerial application flight. A factor was the power lines.NTSB SEA97LA072Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Glide, ORfailure of the pilot to maintain clearance from a power transmission line. Factors relating to the accident included ambient light conditions, which made the power line hard to see.NTSB FTW96LA385Accident · Minor injuriesLimited investigationFinal reportHiller UH12E · Hamburg, ARThe loss of tail rotor control as result of a tail rotor blade strike by a partially disconnected ballast weight, due to a disconnected pin. A factor was the lack of suitable terrain for the forced landing.NTSB FTW96LA315Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Mount Holly, ARFuel exhaustion due to the pilot's failure to refuel the helicopter. A factor was the lack of suitable terrain for the forced landing.NTSB LAX96LA279Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Healdsburg, CAThe failure of the pilot to confirm a loss of power before entering autorotation after reading an erroneous instrument indication on the helicopter's dual tachometer. Factors in the accident were the erratic instrument, and maintenance personnel who failed to…NTSB ATL96LA104Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Cottondale, FLfailure of the main rotor drive torsional coupling and inner gimbal ring, which resulted in jamming of the flight controls during an attempted autorotation.NTSB FTW96LA285Accident · No injuriesLimited investigationFinal reportHiller UH12 · Franklin, LAloss of engine power for undetermined reasons, and the pilot's failure to maintain rotor RPM. A factor was the unsuitable terrain available for the precautionary landing.NTSB SEA96LA100Accident · No injuriesLimited investigationFinal reportHiller UH-12 · Walla Walla, WAthe pilot's inadequate preflight/planning, and his failure to refuel the helicopter with sufficient fuel before flight, which resulted in fuel exhaustion and a subsequent forced landing. A factor relating to the accident was: an inaccurate fuel quantity…NTSB IAD96LA077Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Hellam, PAthe pilot's loss of directional control during aerial application for undetermined reasons.NTSB CHI96LA151Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Big Lake, MNthe pilot's inadequate preflight of the helicopter by not having removed a tiedown strap before attempting takeoff.NTSB ATL96LA076Accident · Serious injuriesLimited investigationFinal reportHiller UH12-E · Huger, SCThe blocked fuel vent line that resulted in engine stoppage. A factor was tall trees that intervened the helicopter's flight path.NTSB LAX95LA318Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Dos Palos, CAthe fatigue failure of the tail rotor tension torsion bar plates.NTSB CHI95LA202Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Blue Rapids, KSthe leaking drain in the main fuel sump. Factors to the accident were the incorrect fuel indication, the ravine, fuel exhaustion, and the low rotor RPM.NTSB SEA95LA077Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Timber, ORThe pilot's inadequate aircraft preflight during which he failed to notice the main rotor shipping block had not been removed, and the resultant restricted movement of the flight control system.NTSB LAX95LA132Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Five Points, CAfuel exhaustion due to the pilot's inattention to the fuel supply.NTSB LAX95LA109Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Arvin, CAThe seizure of the transmission due to lack of lubrication from a plugged oil supply line.NTSB LAX95LA096Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Chowchilla, CAthe in-flight failure and separation of the main rotor hub due to a fatigue crack.NTSB LAX95LA005Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Salinas, CAan in-flight engine compartment fire for undetermined reasons.NTSB CHI94LA191Accident · 1 fatalLimited investigationFinal reportHiller HU-12E · Watertown, SDthe pilot's failure to maintain a visual lookout. A factor associated with the accident was the powerlines.NTSB SEA94LA149Accident · Minor injuriesLimited investigationFinal reportHiller-Soloy UH-12L4 · Clarkston, WADisconnection of the ballast bar aft retaining pin. Factor(s) were: tail rotor blade separation and reduced aircraft control.NTSB SEA94T#A01Accident · No injuriesClass 3Final reportHiller UH-12E · Eugene, ORNTSB FTW94LA144Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Osage, ARFuel exhaustion due to the pilot's failure to refuel and the lack of suitable terrain for a forced landing.NTSB BFO94LA040Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Farmville, VAthe pilot's failure to refuel the helicopter with the correct fuel. Factors in the accident were the unclear information given by the passenger and airport line service personnel, the insufficient information regarding the labeling of the airport's fuel…NTSB MIA94LA029Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Moore Haven, FLFailure of the pilot-in-command to maintain aircraft control following loss of engine power for undetermined reasons.NTSB LAX94LA054Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Salinas, CAa fatigue failure of the torsion-tension bar pin due to fretting corrosion. A factor in this accident was an inadequate quality of material utilized in the manufacture of the pin.NTSB LAX94LA043Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Salinas, CAThe pilot's improper handling of the helicopter which resulted in overloading of the rotor system in a maneuvering turn during aerial application of chemical, and subsequent failure of the main rotor paddle assembly.NTSB CHI94LA022Accident · No injuriesLimited investigationFinal reportHiller UH12E · Sioux Rapids, IAthe Pilot in Command failed to maintain clearance with the terrain while proceeding up an upslope.NTSB SEA93LA181Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Auburn, WAFailure of the connecting rod bolt. The high vegetation was a factor.NTSB LAX93LA319Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Dixon, CAthe failure of the pilot to visually detect and avoid the guy wire.NTSB CHI93DTK02Accident · Minor injuriesFinal reportHiller UH-12E · Milbank, SDUndeterminedNTSB ATL93LA065Accident · No injuriesLimited investigationFinal reportHiller UH12E · Greeleyville, SCThe pilot's misjudgment of the helicopter's altitude during the landing flare.NTSB DEN93FA033Accident · 3 fatalField investigationFinal reportHiller UH-12E · Applegate, ORThe pilot initiating flight into known adverse weather. Factors were: low ceiling, fog, and turbulence.NTSB SEA93GA052Accident · 1 fatalFinal reportHiller UH-12E · Chinook, MTInattentive FBO personnel.NTSB LAX92LA401Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Coachella, CAThe pilot's inadequate visual lookout and his failure to maintain an adequate clearance from the wires.