NTSB investigations: Lycoming TVO-435-GIA
286 cases on aircraft whose registry engine model is Lycoming TVO-435-GIA. 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 ('41526'))
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 ('41526'))
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 LAX96LA263Accident · No injuriesLimited investigationFinal reportBell 47G3 · Wasco, CAthe pilot's failure to maintain adequate engine rpm during an aerial application flight.NTSB LAX95LA100Accident · No injuriesLimited investigationFinal reportBell 47G-3B · China Lake, CAthe pilot's misjudgement of the clearance between the main rotor and a tree while maneuvering at low altitude to herd animals.NTSB LAX94LA200Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Yuma, AZan uncommanded engine deceleration to idle due to the improper installation of the throttle arm on the carburetor shaft.NTSB SEA94LA065Accident · Serious injuriesLimited investigationFinal reportBell 47G-3B-1 · Gold Hill, ORSeparation of the crossover fuel line, and the inability of the pilot in command to maintain a proper rate of descent during the autorotation.NTSB SEA94LA042Accident · No injuriesLimited investigationFinal reportBell 47G3B1 · Mesa, WAThe pilot's improper flare. Factors include excessive airspeed while approaching the flare.NTSB CHI93LA305Accident · Minor injuriesLimited investigationFinal reportBell 47G-3B · Clarinda, IAThe commercial pilot's failure to maintain adequate clearance from obstacles during aerial application maneuvers.NTSB LAX93LA209Accident · No injuriesLimited investigationFinal reportBell 47-G2 · AntarcticaThe pilot's poorly planned approach.NTSB SEA93LA034Accident · No injuriesLimited investigationFinal reportBell 47G3-B2A · Montpelier, IDThe loss of engine power due to leaking internal carburetor seals, resulting from improper repair of the carburetor by an acft repair station.NTSB MIA93LA014Accident · Minor injuriesLimited investigationFinal reportBell 47-G3-B1 · Palm Beach, FLThe pilot's inadequate preflight planning. A factor was the pilot's failure to maintain rotor RPM during the autorotation.NTSB NYC92LA159Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · West Mifflin, PAA yaw for unknown reason(s) which resulted in the tail rotor contacting the dirt bank and a loss of control. A factor related to the accident was the decision of the pilot to operate in close vicinity to the dirk bank.NTSB FTW92LA026Accident · Serious injuriesLimited investigationFinal reportBell 47G3B2A · Texarkana, TXThe pilot's failure to maintain proper terrain clearance during takeoff. A factor was his lack of total experience in helicopters.NTSB NYC92LA006Accident · Minor injuriesLimited investigationFinal reportBell 47G-3B-1 · Catawissa, PAPilot factor in that the pilot used poor judgement and loaded more passengers than were seats on the helicopter this resulted in control interference and subsequent loss of control. Contributing was the pilot's failure to check the weight and balance for the…NTSB MIA91LA217Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Penuelas, PRInadvertent control interference by a passenger shortly after takeoff resulting in the loss of control and roll over after touchdown.NTSB CHI91LA257Accident · No injuriesLimited investigationFinal reportBell 47G · Lake Ozark, MOFailure of the rotorcraft's tail boom in flight. Factors related to the accident were reduced aircraft control available to the pilot.NTSB DEN91LA096Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Colorado Spring, COThe pilot attempting to operate the helicopter outside the design operating envelope. Factors were: high altitude, high temperature, and high density altitude.NTSB CHI91DER05Accident · No injuriesFinal reportBell 47G3B1 · Lasalle, MNThe pilot's failure to maintain adequate clearance from the terrain. A related factor is the pilot's misjudged altitude above the crop.NTSB SEA91LA109Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Malott, WAAn undetermined failure of the fuel pump casing resulting in an in flight fire and loss of engine power.NTSB ATL91FA013Accident · Serious injuriesField investigationFinal reportBell 47J-2 · Gatlinburg, TNThe accident was inadequate maintenance of the helicopter, allowing a tail rotor drive shaft bearing to exceed wear limits. This resulted in high loads on the tail rotor drive shaft, and the resulting fatigue failure of the drive shaft.NTSB CHI90DER03Accident · No injuriesFinal reportBell 47G3B1 · Coon Rapids, MNThe pilot-in-command's inaccurate fuel consumption calculations and misjudgement of his fuel supply.NTSB MIA90LA125Accident · Minor injuriesLimited investigationFinal reportBell 47G-3B-1 · Lake Wales, FLThe pilot's failure to maintain adequate clearance between the main rotor blades and a power line pole while maneuvering during an aerial application flight.NTSB FTW90DPA03Accident · No injuriesFinal reportBell-Moore 47G-2A · Sivell Bend, TXClearance was not maintained by the pilot-in-command.NTSB SEA90LA048Accident · Minor injuriesLimited investigationFinal reportBell BH-47G3B2 · Des Moines, WAPartial loss of engine power, cause undetermined. The aircraft was not recovered and examination of the engine was not possible.NTSB ATL90LA030Accident · Serious injuriesLimited investigationFinal reportBell 47G-3B1 · Ewell, ALThe loss of engine power, for undetermined reasons, at low altitude during a practice autorotation. Contributing to the accident was the instructor's failure to properly plan the demonstrated autorotation so as to preclude an accident, in the event that power…NTSB SEA89LA175Accident · 1 fatalLimited investigationFinal reportBell 47G3B2 · Monitor, WAThe pilot failed to maintain aircraft separation from obstacles on the ground. A factor in the accident was the bright glare from the rising sun.NTSB SEA89LA116Accident · Minor injuriesLimited investigationFinal reportBell 47G3B2A · Dyer, NVThe pilots poor planning in attempting a hover in undesirable conditions which resulting in the inability to maintain rotor rom. Contributing to the accident was the mountainous terrain and high density alt.NTSB LAX89DVA03Accident · Serious injuriesFinal reportBell 47G-3B2 · Strathmore, CAImproper compensation for wind conditions by the pilot, and his failure to maintain clearance from the service truck. Factors relating to the accident were: the unfavorable (variable) and gusty wind conditions and close proximity of the service vehicle.NTSB DEN88LA135Accident · Serious injuriesLimited investigationFinal reportBell 47G · Terry, MTThe aircraft was on a ferry flight from alpine, WY. To belfield, ND. The plt departed alpine at approximately 0950 and made several enroute stops to refuel. The plt intended to land at miles city, MT to refuel but he got lost and flew to Terry, MT, located 38…NTSB DEN88FA106Accident · 1 fatalField investigationFinal reportBell 47G-3B1 · Cortez, COThe plt said that he had just taken off and reached an alt of about 300 ft when his collective control went 'limp'. The helicopter entered a descent, partially controlled by the plt using throttle and cyclic control inputs. The helicopter touched down in soft…NTSB DEN87LA235Accident · No injuriesLimited investigationFinal reportBell 47-G3B2 · Oakley, UTThe plt had just taken off from a confined area surrounded on two sides with electrical power lines. As he attempted to climb, he said his RPM began to bleed off. He stated that he made a right pedal turn to avoid the wires but was unable to prevent a hard…NTSB SEA87LA118Accident · Minor injuriesLimited investigationFinal reportBell 47G-3B-2 · Milton-Freewatr, ORThe pilot was hovering up rising terrain at a slow airspeed, at 15 feet above the ground while on an agricultural spraying flight and encountered settling with power. The aircraft entered an uncontrolled descent and impacted the ground.NTSB DEN87LA120Accident · No injuriesLimited investigationFinal reportBell 47G3B2A · Brigham City, UTAn ag plt was ferrying a helicopter to another job in his local area. The plt, an ATP, had estimated that the helicopter had enough fuel for the flt. The helicopter's engine quit and an autorotation was performed, resulting in a hard landing. Less than one…NTSB FTW87GA083Accident · No injuriesFinal reportBell 47G-3B-1 · Odessa, TXInvestigation reveals the helicopter touched down on the heel of its skids, left skid first, and at a slightly low rotor RPM. The tail boom then moved upward while the main rotor blades flexed downward. The main rotor blades contacted and severed the tail…NTSB DEN87LA019Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Goshen, UTThe plt was practicing power recovery autorotations then attempted one power off, full stop. The plt allowed the main rotor RPM to decay during approach and took no corrective action. The acft landed hard with slight forward motion and the plt applied aft…NTSB SEA86LA182Accident · Serious injuriesLimited investigationFinal reportBell 47G3B1 · Albany, ORA Bell 47G3B1 crashed into the south santiam river after contacting power lines while on an instructional flight. The CFI (helicopter) plt received serious injuries and the private plt (airplane) helicopter student received minor injuries. The helicopter…NTSB SEA86LA176Accident · 1 fatalLimited investigationFinal reportBell 47G-3B1 · Burbank, WAThe helicopter had landed for reloading and was stationary with rotors idling. A ground loader person approached the helicopter over a small sandy knoll and was struck by the main rotor, sustaining fatal injury.NTSB ATL86LA138Accident · No injuriesLimited investigationFinal reportBell 47G-3B · Red Bay, ALThe pilot had completed a dispensing operation and was returning to the ag staging area to refuel. As the helicopter hovered towards the parked refueling vehicle, the main rotor blades struck a metal structure attached to the truck. The pilot stated that the…NTSB MIA86LA152Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Panama City, FLWhile approaching to land during a sightseeing flt a loss of eng pwr was experienced and an autorotation was made 70 ft short of the helipad. During touchdown, the main rotor struck and severed the tail boom. The plt stated after touchdown the eng continued…NTSB DEN86LA119Accident · No injuriesLimited investigationFinal reportBell 47G-3B-2 · Santa Fe, NMAccording to the student plt, he was attempting to hover the helicopter when he encountered turbulence. The student plt stated that the hard landing which followed resulted in spreading the skids & severing the tailboom.NTSB SEA86LA105Accident · No injuriesLimited investigationFinal reportBell 47G3B1 · Albany, ORThe plt reported that after aprx 15 minutes of flt, the eng sputtered 2 or 3 times. An autorotation was performed onto rough terrain during which the tail rotor drive shaft was damaged by the main rotor blades. Post accident inspection revealed a hole in the…NTSB DEN86LA079Accident · Minor injuriesLimited investigationFinal reportBell 47G3 B-2 · Grand Junction, COThe plt stated that while turning to the intended landing area, the helicopter he was piloting encountered both downdrafts & tailwind. The plt indicated the helicopter settled until grnd contact.NTSB SEA85LA174Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Lebanon, ORThe plt stated he performed 4 circling approaches over a sand bar and on the 5th approcah, rotor RPM decayed. Unable to regain the RPM, a hard landing resulted during which the main rotor blades severed the tailrotor.NTSB SEA85LA178Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Idaho City, IDWhile the student plt was on a x-country flt, the eng lost power after the supercharger failed. The plt stated that he was unable to maintain altitude & RPM; he subsequently made a forced landing in a heavily timbered, mountainous area.NTSB DEN85LA144Accident · Minor injuriesLimited investigationFinal reportContinental Copters Tomcat Mark 5A/OH13H · Freeman, SDThe plt said he had completed 4 to 5 swath runs (crop spraying mission). During a turning manuever with a left quatering tail wind, full left pedal,full pwr,the helicopter had a high sink rate until grd impact.NTSB DEN84LA260Accident · No injuriesLimited investigationFinal reportBell 47G · West Glacier, MTFollowing in-flight power loss the pilot performed an autorotation to a forced landing on a highway. On touchdown, the main rotor made contact with a passing motor home. Investigation revealed no fuel on board, although the pilot calculated 0.6 hours of fuel…NTSB SEA84LA162Accident · Minor injuriesLimited investigationFinal reportBell 47G-3B · Eagle Point, ORThe acft main rotor struck the ground during landing. The commercial plt had taken 2 passengers for a sight seeing tour and during landing he said one of them grabbed his right arm at 4 ft AGL and he was unable to recover before ground contact.NTSB CHI84LA232Accident · Minor injuriesLimited investigationFinal reportBell 47G · Fairfax, MNThe helicopter plt turned at the end of a spray run & the acft collided with a power line. He said that because of a quartering tailwind, the helicopter was in a nose high attitude & the tail rotor hit a wire. The plt was able to make an autorotation after…NTSB DEN84LA079Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Ogden, UTThe plt took off from a mountainous work site to return to salt lake city, UT. The wx was clear at the work site (elevation 6700 ft), but there was fog below. After encountering the fog, the plt hovered with a slow forward speed over snow covered terrain. A…NTSB ATL84FA001Accident · 1 fatalField investigationFinal reportBell 47G-3B1 · Pliny, WVThe helicopter was being used in the construction of elect transmission lines. A 150-FT longline cable had been utilizedon an earlier flight for lifting external loads. However, there was no reason for the longline to be attached on the accident flight as the…NTSB MKC83FA196Accident · Serious injuriesField investigationFinal reportBell 47G-3B · Paxton, NEThe plt stated that after landing on a truck platform, he did not decrease rotor RPM & did not lower collective to flat pitch as he was attempting to recover a piece of paper that had fallen to the floor on the right side of the cockpit. As he released the…NTSB LAX83FA366Accident · Serious injuriesField investigationFinal reportBell 47G-3B-1 · S. Lake Tahoe, CADuring takeoff over descending terrain in a mountainous area, the RPM began decaying when the helicopter had accelerated to 40 KTS & was about 75 ft AGL. The plt applied more throttle & increased the collective, then noted that the manifold pressure was…