NTSB investigations: Allison 250-C20 series
18 cases on aircraft whose registry engine model is Allison 250-C20 series, where the first occurrence was “Loss of engine power(total) - nonmechanical”. 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 |
| 1987 | 1 |
| 1988 | 1 |
| 1990 | 2 |
| 1994 | 3 |
| 1996 | 1 |
| 1999 | 1 |
| 2002 | 3 |
| 2004 | 1 |
| 2006 | 2 |
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\" = 353))
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" = 353))
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 ANC06CA122Accident · No injuriesData collectionFinal reportBell 206B · Orlando, FLThe pilot's failure to refuel the helicopter prior to the accident flight, which resulted in a loss of engine power during cruise flight, and a hard landing.NTSB DFW06CA112Accident · No injuriesData collectionFinal reportBell 206B · Vinita, OKThe pilot's improper pre-flight planning, which resulted in a total loss of engine power due to fuel exhaustion. A contributing factor was the lack of suitable terrain for the forced landing.NTSB MIA04LA129Accident · Minor injuriesLimited investigationFinal reportBell 206B3 · Starkville, MSThe operator's inadequate maintenance inspections and the pilot's inadequate preflight inspection, which resulted in the helicopter being operated with a contaminated fuel system, that resulted in fuel starvation, and the loss of engine power.NTSB NYC03LA031Accident · No injuriesLimited investigationFinal reportBell 206B · Odenton, MDThe pilot's failure to monitor his fuel supply which resulted in a power loss due to fuel exhaustion, and the pilot's misjudged flare, which resulted in a hard landing.NTSB DEN02LA046Accident · No injuriesLimited investigationFinal reportBell 206B-III · Moab, UTThe pilot's failure to maintain rotor rpm during a forced landing. A contributing factor was fuel starvation.NTSB SEA02FA030Accident · Serious injuriesField investigationFinal reportAgusta A109A II · Baring, WAThe sequential non-mechanical total loss of power in both engines 1 and 2 for undetermined reasons and the pilot's failure to maintain adequate rotor RPM to prevent a hard landing. Contributing factors were the tripped "RPM WARN" circuit breaker which…NTSB LAX99FA136Accident · 1 fatalField investigationFinal reportBell 206B · Grand Canyon, AZThe failure of the flight crew to properly preflight the helicopter and to detect and remove accumulated snow from the engine inlets and plenum chamber. Factors in the accident were the clouded plenum chamber inspection window and the failure of preceding…NTSB SEA97LA032Accident · Serious injuriesLimited investigationFinal reportHughes 369D · Forks, WAfuel contamination, which resulted in loss of engine power. Factors relating to the accident included: improper servicing of the helicopter, and a lack of suitable terrain for an emergency landing due to the proximity of trees.NTSB ANC95LA014Accident · No injuriesLimited investigationFinal reportBell 206B · Kenai, AKThe pilot's failure to follow the information in the flight manual concerning the use of the particle separator kit and deflector kit when operating in falling snow. Factors were the rough terrain in the forced landing area and no installation of the…NTSB SEA95LA013Accident · No injuriesLimited investigationFinal reportHiller UH-12E4 · Morton, WAA leak in the fuel filler cap and water in the fuel system. A factor to the accident was: inadequate preflight.NTSB SEA94LA094Accident · Minor injuriesLimited investigationFinal reportHughes 369D · Rimrock, WAFuel exhaustion, the pilot in command's failure to refuel the aircraft, and the inability to successfully execute an auto- rotation landing because of the low altitude.NTSB LAX91LA054Accident · 1 fatalLimited investigationFinal reportMcdonnell Douglas 369D · Haleakla Nat Pk, HIFuel starvation due to the unporting of the fuel supply pick-up.NTSB NYC90LA187Accident · No injuriesLimited investigationFinal reportBell 206B · Fitchburg, MAThe pilot's failure to assure that adequate fuel was on board for the flight.NTSB LAX88LA322Accident · No injuriesLimited investigationFinal reportHughes 369HS · Columbia, CADuring an external load operation, there was an indication of high torque and the oil chip light illuminated. The engine lost power and the pilot initiated an autorotation. The helicopter collided with the sloping terrain and rolled over. Inspection of the…NTSB LAX88LA043Accident · No injuriesLimited investigationFinal reportHughes 369D · Honolulu, HIThe plt rprtd that during an external load operation, the helicopter ran out of fuel. Subsequently, it was damaged when it touched down hard during a forced landing.NTSB LAX85LA407Accident · Serious injuriesLimited investigationFinal reportBell 206B · Pacific Ocean (Pacific Ocean)The helicopter experienced a loss of pwr within 10 minutes after takeoff from a fishing vessel. The helicopter was ditched in the Ocean at coordinates 11.25'N and 103.37'W. Examination of fuel samples from the fishing vessel revealed both upper and lower fuel…NTSB LAX85LA282Accident · No injuriesLimited investigationFinal reportBell 206B-III · Lahaina, HIThe pilot reported that the engine failed at an altitude of 800 feet MSL during the climb to cruise phase of a sightseeing flight with 3 passengers on board. The acft landed in the surf of the pacific ocean and damaged the tail rotor. The pilot and passengers…NTSB SEA85LA031Accident · Minor injuriesLimited investigationFinal reportHiller UH-12ET · Hoquiam, WAPlt reported that while in normal cruise flight, a total loss of power occurred. Autorotation was effected in mountainous, wooded terrain. Examination of the engine showed continuity and freedom of rotation. Examination of the fuel system disclosed no…