NTSB investigations: Allison 250-C30 series
104 cases on aircraft whose registry engine model is Allison 250-C30 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 ('03015'))
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 ('03015'))
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 DFW06IA151Incident · Serious injuriesIncident investigationFinal reportBell 206L-1 · South Pass 57 (Gulf of Mexico)The passenger's failure to follow procedures associated with operations in the vicinity of the helicopter and his failure to see/avoid the tail rotor of the helicopter.NTSB ANC06LA066Accident · Minor injuriesLimited investigationFinal reportBell 206L-1 · Juneau, AKThe pilot's failure to maintain adequate altitude/clearance from terrain while maneuvering in adverse weather conditions. Factors associated with the accident are the pilot's decision to continue flight into adverse weather, fog, whiteout and flat light…NTSB DFW06IA145Incident · 1 fatalIncident investigationFinal reportBell 206L-3 · Grand Isle 43AAThe pilot's incapacitation and death due to pre-existing cardiac disease.NTSB DFW06FA083Accident · 2 fatalField investigationFinal reportBell 206L-1 · Patterson, LAThe improper installation of an engine fuel line fitting by other maintenance personnel, which resulted in a loose fitting and a loss of engine power during cruise flight. Factors associated with the accident are a tailwind, and the lack of a suitable site…NTSB LAX06LA098Accident · No injuriesLimited investigationFinal reportEurocopter AS350D · Kahului, HIA total loss of engine power due to the internal effects on the bearings consistent with an operating event of insufficient oil supply. Contributing to the accident was the pilot’s improper flare during the autorotative descent.NTSB DFW06CA058Accident · No injuriesData collectionFinal reportBell 206L-4 · Fort Worth, TXThe flight instructors failure to maintain main rotor RPM and improper flare, which resulted in a hard landing.NTSB DFW06FAMS1Accident · 3 fatalMissing aircraftFinal reportBell 206-L3 · Gulf of MexicoUndetermined. The aircraft is missing.NTSB DFW05MA230Accident · Serious injuriesMajor investigationFinal reportSikorsky S76 · Gulf of Mexico, TXThe pilots' delayed response to the No. 1 engine fire warning and the loss of power to both engines, which occurred for undetermined reasons. The pilots' delayed response was most likely due to stress and fatigue. Contributing to the delay of the initiation…NTSB DFW05CA213Accident · No injuriesData collectionFinal reportBell 206L · Gulf of MexicoThe pilot's failure to maintain clearance with a stationary object while landing.NTSB CHI05CA156Accident · Minor injuriesData collectionFinal reportBell 206L-3 · Algonac, MIThe pilot not maintaining helicopter control, the loss of tail rotor effectiveness he encountered, and his not maintaining clearance from objects during the approach. Factor were the low altitude, the transmission lines, and the garage.NTSB IAD05TA058Accident · Minor injuriesFinal reportHughes 369FF · Quantico, VAThe flight crew's failure to maintain adequate altitude/clearance from a building, which resulted in contact with the building, dynamic rollover, and collision with terrain.NTSB DFW05LA074Accident · No injuriesLimited investigationFinal reportBell 206L-3 · Cameron, LAFuel starvation due to a blocked and collapsed fuel nozzle screen, resulting from a contaminated fuel source/facility. Factors were the inadequate maintenance/inspection of fuel sources, and the lack of suitable terrain (high sea state) for the forced landing…NTSB LAX04CA268Accident · No injuriesData collectionFinal reportMcDonnell Douglas 369FF · Lihue, HIThe pilot misjudging the clearance between the tree and the main rotor blades. Contributing factors to the accident were the high workload of the pilot and his lack of experience with bambi bucket operations.NTSB LAX04LA216Accident · Minor injuriesLimited investigationFinal reportBell 206L-3 · Palmdale, CAThe momentary loss of engine power for undetermined reasons.NTSB FTW04LA088Accident · Minor injuriesLimited investigationFinal reportBell 206L-3 · W. Cameron 149A partial loss of engine power due to undetermined reasons. A contributing factor was the emergency floats not being deployed.NTSB FTW04FA007Accident · 3 fatalField investigationFinal reportBell 206L-3 · W. Cameron 509The pilot's loss of control following an inadvertent encounter with adverse weather conditions. Contributing factors were the prevailing thunderstorms, the low ceilings, and the miscommunication between the pilot and the company's communication center in…NTSB DEN02LA101Accident · Serious injuriesLimited investigationFinal reportBell 206L-III · Canon City, COthe pilot's failure to maintain clearance of a static wire, and the subsequent loss of aircraft control due to the main rotor pitch change tubes being severed.NTSB NYC02LA083Accident · No injuriesLimited investigationFinal reportBell 206-L3 · New York, NYThe pilot's improper flare while landing, which resulted in a collision with a concrete curb.NTSB FTW02LA064Accident · No injuriesLimited investigationFinal reportBell 206L-3 · Grand Isle 74The pilot's misjudged landing flare. A contributing factor was the fatigue fracture of the PC air line due to the improper installation by company maintenance personnel, which resulted in a loss of engine power.NTSB FTW02LA019Accident · Serious injuriesLimited investigationFinal reportBell 206L-3 · East Cameron 78The hard landing due to the pilot's failure to maintain proper main rotor rpm. Contributing factors were the loss of engine power for undetermined reasons, and the pilot's failure to deploy the emergency floats.NTSB LAX01LA292Accident · No injuriesLimited investigationFinal reportBell 206-L4 · Mesa, AZThe pilot's improper autorotation in that he failed to attain the proper descent rate resulting in a hard landing and subsequent airframe damage. A factor was the high temperature.NTSB FTW01LA195Accident · Serious injuriesLimited investigationFinal reportBell 206L-3 · Cameron, LAfuel contamination due to the combination of DIEGME, water, and bacterial growth, which resulted in formation of an apple-jelly type material that blocked the fuel nozzle screen and led to a loss of engine power.NTSB FTW01LA176Accident · No injuriesLimited investigationFinal reportSikorsky SK-76A · New Iberia, LAthe loss of control while maneuvering for undetermined reasons.NTSB LAX01LA157Accident · No injuriesLimited investigationFinal reportBell 206-L3 · Willcox, AZA loss of engine power due to the likely unporting of the fuel tank pickups as the helicopter was maneuvered to look at animals on the ground. Also causal was the pilot's misjudged touchdown point during an autorotational approach, which resulted in the…NTSB FTW01IA061Incident · No injuriesIncident investigationFinal reportBell 206-L3 · Wc 368fuel exhaustion during approach due to the pilot's failure to refuel.NTSB FTW01LA004Accident · Serious injuriesLimited investigationFinal reportBell 206-L1 · Jasper, TXThe pilot's inadvertent VFR flight into instrument meteorological conditions, which resulted in his failure to maintain control of the helicopter. Factors were the fog and the pilot's lack of instrument flight experience.NTSB SEA00TA182Accident · No injuriesFinal reportBell 206-L4 · Atlanta, IDThe pilot's failure to maintain clearance from an object. Trees and inadequate ground communications were a factor.NTSB FTW00LA137Accident · No injuriesLimited investigationFinal reportBell 206L3 · Salt MarshThe company mechanic's failure to replace the bolt's cotter key properly and the subsequent loss of the nut, which then resulted in the tail rotor control disconnection and the pilot's inability to maintain aircraft control.NTSB LAX00FA160Accident · Serious injuriesField investigationFinal reportBell 206L-3 · Grand Canyon, AZA snow ingestion caused loss of engine power due to the pilot's inadequate preflight inspection and failure to remove the accumulated snow from the engine inlet area. Also causal was the pilot's failure to maintain main rotor rpm while maneuvering to avoid…NTSB SEA00LA020Accident · No injuriesLimited investigationFinal reportBell 206L-1 · Neihart, MTClearance from an object was not maintained. Gusting wind conditions was a factor.NTSB LAX00LA024Accident · No injuriesLimited investigationFinal reportBell 206-L4 · Santa Clarita, CAThe pilot's delay in adding power during a power-on recovery from an autorotation, which resulted in a hard landing and rollover. The flight instructor's inadequate supervision of the flight was also causal.NTSB FTW99LA240Accident · Serious injuriesLimited investigationFinal reportBell 206-L3 · Main Pass 225aThe pilot's failure to maintain directional control of the helicopter. A factor was the tailwind condition.NTSB FTW99LA077Accident · No injuriesLimited investigationFinal reportBell 206L-3 · West Delta 105bThe pilot's failure to maintain clearance with the oil platform's windsock on final approach to landing.NTSB FTW98TA328Accident · Minor injuriesFinal reportBell 206L-3 · Reklaw, TXThe pilot's failure to maintain proper alignment in that the external load was not centered during sling operation, which resulted in entanglement of the load with the landing gear, and the loss of aircraft control.NTSB FTW97LA356Accident · Serious injuriesLimited investigationFinal reportSikorsky S-76A · Patterson, LAfailure of the copilot to maintain a positive rate of climb after takeoff, which led to an inadvertent descent and collision with a crop of sugar cane and the ground. Factors relating to the accident were: darkness, fog, and the pilot-in-command's inadequate…NTSB FTW97LA217Accident · No injuriesLimited investigationFinal reportBell 206L-3 · Weston, COthe pilot's improper in-flight planning/decision and failure to maintain adequate altitude and/or clearance from rising mountainous/hilly terrain. The unfavorable wind condition and low airspeed were related factors.NTSB CHI97FA149Accident · No injuriesField investigationFinal reportBell 206L3 · Boise, IDthe improper torque meter installation by maintenance personnel, attempting flight with known discrepancies by the pilot-in-command and the check airman, and an improper autorotation by the pilot-in-command with improper oversight of the autorotation maneuver…NTSB FTW97LA016Accident · No injuriesLimited investigationFinal reportBell 206L-3 · Venice, LAa loss of engine power due to frogs being ingested into the engine as a result of the pilots failure to perform a thorough preflight, and the pilot's improper touchdown technique.NTSB FTW94FA274Accident · No injuriesField investigationFinal reportBell 230 · Albert Lea, MNThe pilot's failure to execute the proper approach and the ensuing settling with power. Factors were the tailwind, and the congestion around the airport.NTSB BFO94FA135Accident · 3 fatalField investigationFinal reportBell 206L-4 · Whiting, NJThe pilot's improper in-flight planning/decision, flight into instrument meteorological conditions (IMC), and subsequent spatial disorientation, which resulted in loss of aircraft control. Factors related to the accident were: darkness, the adverse weather…NTSB FTW94GA232Accident · 3 fatalFinal reportBell 206L-3 · Mimbres, NMThe pilot's improper decision to attempt to hover out of ground effect under adverse conditions while exceeding the maximum allowable weight for that maneuver. Factors in the accident were: high density altitude and the tailwind.NTSB SEA94LA073Accident · Minor injuriesLimited investigationFinal reportBell 206 L-1 · Salt Lake City, UTThe pilot's selection of unsuitable terrain for a landing site. Factors include snow covered terrain.NTSB FTW94LA071Accident · No injuriesLimited investigationFinal reportBell 206L-3 · Cascade, COThe pilot's improper in-flight planning which resulted in the aircraft's yaw performance being exceeded. A factor was the high density altitude.NTSB FTW92LA166Accident · No injuriesLimited investigationFinal reportBell 206L-3 · Ponca City, OKThe pilot's failure to maintain main rotor RPM. A factor was the contaminated fuel.NTSB LAX92LA254Accident · Minor injuriesLimited investigationFinal reportBell 206-L3 · Waikoloa, HIFailure of the rear landing gear cross tube due to corrosion.NTSB LAX92T#A04Accident · No injuriesClass 3Final reportBell 206L-1 · Fort Irwin, CANTSB DEN89MA130Accident · 4 fatalMajor investigationFinal reportBell 206L-3 · Big Timber, MTFailure of the pilot to maintain control of the aircraft during takeoff, due to spatial disorientation, which resulted in a collision with the terrain. Contributing factors were: dark night, pilot's visual perception, inadequate initial training of the pilot…NTSB NYC86IA109Incident · No injuriesIncident investigationFinal reportSikorsky S-76 · Atlantic City, NJDuring a preflight examination of a Sikorsky S76 the instructor and student discovered a hole in the leading edge of the pylon above the intermediate gear box and scuff mark on the main rotor blade caps. The instructor and student had just completed a 2.1 hr…NTSB NYC85FA145Accident · 1 fatalField investigationFinal reportSikorsky S76A · Belmar, NJDuring takeoff & landing practice for a pre-solo plt the CFI saw a helicopter, N176FJ, approaching the arpt. N4956B, at the time of 1st sighting, was on a left base for rwy 3. The rotorcraft apparently did not see N4956B or hear any radio calls at this…NTSB FTW85LA119Accident · Minor injuriesLimited investigationFinal reportSikorsky S-76A · Houma, LAThe aircrew had just completed a medivac flt & were repositioning the helicopter to the home base. While they were en route, the company dispatcher informed the crew that fog was moving into the area & that they had better hurry. During the night apch, the…