NTSB investigations: Allison 250-C20 series
40 cases on aircraft whose registry engine model is Allison 250-C20 series, where the first occurrence was “Loss of control - in flight”. 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 per year
| 1984 | 1 |
|---|---|
| 1985 | 2 |
| 1986 | 1 |
| 1988 | 1 |
| 1989 | 3 |
| 1991 | 2 |
| 1994 | 3 |
| 1995 | 2 |
| 1996 | 1 |
| 1997 | 2 |
| 1998 | 1 |
| 2000 | 4 |
| 2001 | 1 |
| 2002 | 1 |
| 2003 | 3 |
| 2004 | 4 |
| 2005 | 6 |
| 2006 | 1 |
| 2007 | 1 |
Where
Open the mapLatest cases
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 ('03020')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o.\"occurrenceNumber\" = 1 AND o.\"occurrenceCode\" = 250))
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 ('03020')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 250))
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 DFW07LA109Accident · Minor injuriesLimited investigationFinal reportBell 206B · E. Cameron 219The pilot's failure to establish a climb and maintian directional control of the helicopter while departing the offshore platform.NTSB NYC06TA190Accident · Minor injuriesFinal reportMD Helicopter 500N · Louisville, KYThe pilot's failure to maintain control of the helicopter and the flight instructor's inadequate supervision, which resulted in a hard landing and subsequent rollover.NTSB SEA05MA202Accident · 3 fatalMajor investigationFinal reportAgusta A109A II · Edmonds, WALoss of control for an undetermined reason during maneuvering flight, which resulted in an in-flight collision with water.NTSB CHI05CA271Accident · No injuriesData collectionFinal reportBell 206B · Elk Point, SDThe loss of directional control for undetermined reasons which led to the pilot not being able to maintain clearance from the embankment during the forced landing. The rising embankment was a factor.NTSB DFW05LA239Accident · Minor injuriesLimited investigationFinal reportBell 206B · New Orleans, LAThe pilot's failure to maintain directional control after encountering a loss of tail rotor effectiveness. A contributing factor was the lack of suitable terrain.NTSB LAX05LA289Accident · Serious injuriesLimited investigationFinal reportBell 206B · Long Beach, CAthe pilot's decision not to release the banner when it became entangled on itself, which resulted in the banner tow rope becoming ensnarled with the tail rotor system.NTSB DFW05LA252Accident · Minor injuriesLimited investigationFinal reportBell 206B · Myrtle Grove, LAThe pilot's loss of control in flight for undetermined reasons.NTSB DFW05FA086Accident · 3 fatalField investigationFinal reportBell 206B-3 · Shelbyville, TXThe pilot's failure to maintain altitude and clearance for undetermined reasons.NTSB MIA05FA008Accident · 3 fatalField investigationFinal reportEurocopter Deutschland BO-105 CBS5 · Santa Rosa Bch, FLThe pilot's spatial disorientation and in-flight loss of control of the helicopter after encountering night instrument meteorological conditions resulting in collision with water during the resultant uncontrolled descent. A factor in the accident was the…NTSB MIA04LA121Accident · Minor injuriesLimited investigationFinal reportMcDonnell Douglas 369E · Ochopee, FLThe pilot's loss of control in flight for undetermined reasons, which resulted in an uncontrolled descent, and subsequent impact with trees and the terrain.NTSB SEA04TA163Accident · 1 fatalFinal reportBell 206B · Mead, WAThe reversal of the reel machine during a sock line pull which resulted in a loss of control while hovering out of ground effect. Factors were the failure of company management to develop adequate procedures for conducting sock line pulls, the inadequate…NTSB FTW04TA075Accident · Minor injuriesFinal reportBell 206B · Decatur, TXThe pilot's failure to maintain control of the helicopter during liftoff after encountering dynamic rollover. A contributing factor was the rough and uneven terrain.NTSB CHI03LA172Accident · Minor injuriesLimited investigationFinal reportBell 206B · Baxter, MNThe pilot's failure to maintain control of the helicopter due to a loss of tail rotor effectiveness. Factors contributing to this accident were the helicopter's low airspeed, low altitude, the crosswind, and the trees.NTSB FTW03LA134Accident · No injuriesLimited investigationFinal reportHughes 369HS · Conroe, TXThe pilot's inability to control the helicopter after encountering loss of tail rotor effectiveness. A contributing factor was the unfavorable winds.NTSB CHI03FA060Accident · 1 fatalField investigationFinal reportAgusta A109C · West Chicago, ILThe pilot's failure to maintain control of the helicopter while maneuvering, resulting in the excessive descent rate and impact with terrain. Factors to the accident included the dark night, low ceiling and reduced visibility at the time of the accident.NTSB FTW02FA099Accident · 1 fatalField investigationFinal reportBell 206L-4 · Eugene Isld 188The pilot's failure to maintain aircraft control during takeoff. A contributing factor was the pilot's inadequate preflight which resulted in his failure to remove the left front tie down.NTSB MIA01TA194Accident · Minor injuriesFinal reportBell 206B-III · Jacksonville, FLthe pilot's failure to recognize and correct for unanticipated right yaw/loss of tail rotor effectiveness (LTE) during an approach to hover at a low altitude, which resulted in a loss of control and the helicopter descending and colliding with a house and the…NTSB CHI00LA121Accident · No injuriesLimited investigationFinal reportHughes 500C · Salina, KSthe loss of tail rotor effectiveness and the autorotation performed by the pilot. The unfavorable wind was a contributing factor.NTSB FTW00FA091Accident · 4 fatalField investigationFinal reportEurocopter BO105S-CBS-5 · Dalhart, TXThe pilot's failure to maintain control of the helicopter as a result of his continued flight into known adverse weather conditions. Factors were the dark night light condition, fog, low ceiling, and the pilot's lack of total instrument flight time.NTSB LAX00LA109Accident · Minor injuriesLimited investigationFinal reportHughes 500C · Pohnpei (Pacific Ocean)The pilot reported that he and the observer were planning to conduct tuna spotting operations. This was to be the first flight of the day. After takeoff, about 100 to 150 feet above sea level, the helicopter began an uncommanded right turn, followed by an…NTSB IAD00LA015Accident · No injuriesLimited investigationFinal reportBell 206A · Brutus, NYWas the pilot's failure to maintain directional control after encountering a loss of tail rotor effectiveness.NTSB LAX98LA200Accident · 2 fatalLimited investigationFinal reportHughes 369HS · Pacific Ocean (Pacific Ocean)The improper shimmying of the tail rotor driveshaft by maintenance personnel which induced fatigue in the tail rotor driveshaft coupling causing it to fail, which resulted in a loss of tail rotor control. A factor is the failure of the pilot to recognize the…NTSB FTW97LA252Accident · Serious injuriesLimited investigationFinal reportBell 206B · New Iberia, LAthe pilot's improper in-flight planning/decision. A related factor was his failure to follow the company procedure of maintaining visual contact with the external long-line cable, while hovering with it attached.NTSB LAX97GA105Accident · 1 fatalFinal reportMcDonnell Douglas 369D · Santee, CASpatial disorientation and temporary visual impairment that led to a loss of aircraft control as result of difficulty to light adaptivity. Contributing was the crew coordination and inadequate night flight recurrency training.NTSB FTW96LA147Accident · Minor injuriesLimited investigationFinal reportBell 206BIII · Houma, LAthe pilot's attempted maneuver which exceeded the dynamic capability of the helicopter.NTSB FTW96FA028Accident · 2 fatalField investigationFinal reportMbb BO-105S · League City, TXthe pilot's failure to maintain aircraft control. Factors were the pilot's lack of total experience in the MBB BO-105 helicopter and the dark night light conditions.NTSB ANC95LA115Accident · Minor injuriesLimited investigationFinal reportBell 206B · Talkeetna, AKThe inadvertent restriction of the anti-torque pedal by the pilot's foot, while the pilot (an incomplete paraplegic) was attempting to land.NTSB LAX94LA352Accident · Minor injuriesLimited investigationFinal reportHughes 369E · Volcano, HIthe pilot's failure to maintain adequate main rotor rpm and the resultant inadvertent skid contact with the ground.NTSB LAX94LA241Accident · No injuriesLimited investigationFinal reportHughes 369D · Kaneohe, HIthe operator's and pilot's failure to ensure that the cargo net containing empty paper bags was sufficiently ballasted to prevent it from flying up into the tail rotor.NTSB FTW94LA061Accident · Serious injuriesLimited investigationFinal reportHughes 369HS · Mason, TXLoss of aircraft control for an undetermined reason.NTSB SEA92FA016Accident · 1 fatalField investigationFinal reportBell 206B · Salt Lake City, UTThe pilot failed to maintain directional control. Factors to the accident were: inadeqaute remedial action, over confidence in personal ability, and lack of recent expereince.NTSB SEA91FA184Accident · 1 fatalField investigationFinal reportBell 206B · Toutle, WAFailure of the pilot to maintain airspeed and correct for the right yawing condition. Factors to the accident were: inadequate compensation for wind conditions, diverted attention, and lack of total expereince in type of aircraft.NTSB LAX90FA060Accident · 1 fatalField investigationFinal reportMcDonnell Douglas 369E · Santa Rosa, CAThe pilot's improper preflight planning/decision which resulted in the loss of tail rotor effectiveness. Contributing to the accident was the pilot allowing the maximum gross weight of the aircraft to be exceeded, and the tailwind.NTSB LAX89FA136Accident · No injuriesField investigationFinal reportAerospatiale AS-355-F · Bear Valley, CAImproper in-flight planning/decision by the pilot, which resulted in a loss of aircraft control during a slow speed, downwind approach to a high altitude stolport. Contributing factors were: high density altitude, tailwind, improper weather evaluation by the…NTSB DEN89LA090Accident · No injuriesLimited investigationFinal reportBell 222 · Leadville, COFailure of the pilot to compensate adequately for wind conditions with rudder pedals while maneuvering in unfavorable wind and high density altitude.NTSB LAX88LA179Accident · Serious injuriesLimited investigationFinal reportMcDonnell Douglas 369D · Waialua, HIFailure to follow procedures established by the manufacture for uncommanded trim inputs and his decision to make a hover approach to landing.NTSB LAX86MA311Accident · 2 fatalMajor investigationFinal reportBell 206B · Alamo, CAWitnesses reported seeing the helicopter circle twice over a residence at an alt of aprx 50' AGL. Upon initiating the third turn the helicopter entered an abrupt 90 deg bank and nosed down to impact with the terrain. Exam of the helicopter failed to reveal…NTSB LAX85LA403Accident · Serious injuriesLimited investigationFinal reportHughes 369D · Porterville, CAAfter climbing to a cruise alt of 13500 ft MSL to cross the sierra Nevada mountains, south of mt whitney, the plt entered cruise flt at an indicated airspeed of aprx 120 to 130 KTS. The plt's flt manual lists 110 KTS as the velocity velocity to never exceed…NTSB LAX85FA199Accident · Serious injuriesField investigationFinal reportHiller UH12J3 · Klamath, CAThe helicopter was returning to a private landing pad after a reconaisance flight prior to sprating. At about 10FT AGL after flaring and leveling the pilot could not control a drift and roll to the left. The rotor blades struck the ground within about one…NTSB SEA85LA020Accident · Minor injuriesLimited investigationFinal reportHughes 369D · Kings Valley, ORThe plt attempted to fly the acft away from the site of a proposed load drop before the drop was completed. The FAA inspectors said the sling did not release properly. When the plt attempted to depart the area the acft struck the groundin a nose low attitude.…