NTSB investigations: Allison 250 SER 250HP
19 cases on aircraft whose registry engine model is Allison 250 SER 250HP, 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
| 1983 | 2 |
|---|---|
| 1985 | 1 |
| 1986 | 1 |
| 1987 | 2 |
| 1990 | 1 |
| 1993 | 1 |
| 1995 | 1 |
| 1996 | 1 |
| 1997 | 1 |
| 1999 | 2 |
| 2000 | 1 |
| 2002 | 1 |
| 2004 | 1 |
| 2005 | 1 |
| 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 ('03002', '03003')
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 ('03002', '03003')
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 DFW07LA171Accident · Serious injuriesLimited investigationFinal reportBell 206L-1 · Marks, MSThe loss of control and hard landing as result of the loss of tail rotor effectiveness. A contributing factor was the prevailing dark night conditions.NTSB LAX06LA220Accident · Minor injuriesLimited investigationFinal reportBell 206B · Chino Hills, CAA loss of aircraft control for undetermined reasons.NTSB CHI05LA218Accident · Serious injuriesLimited investigationFinal reportEnstrom 480 · Goshen, INGround resonance experienced by the pilots.NTSB ATL04TA137Accident · No injuriesFinal reportBell 206B · Graysville, ALThe pilot's inadequate compensation for a tailwind and his failure to maintain directional control resulting in a loss of tail rotor effectiveness. A factor was the pilot's improper in-flight decision to hover with a tailwind.NTSB IAD03LA015Accident · No injuriesLimited investigationFinal reportBell 206L1 · Albany, KYThe pilot's inadequate in-flight planning, which resulted in an angle of approach in relative wind conditions conducive to a loss of helicopter tail rotor effectiveness. A factor was the obstacles surrounding the landing field.NTSB LAX01LA013Accident · Minor injuriesLimited investigationFinal reportBell 206L-1 · Grand Canyon, AZThe pilot's in-flight loss of control during liftoff due to his improper planning and decisions. Related factors were the high density altitude and helicopter weight condition, and the lack of a suitable takeoff area.NTSB CHI99LA298Accident · No injuriesLimited investigationFinal reportBell 206L · Cape Girardeau, MOThe inadequate preflight planning/preparation by the pilot, in that the auxiliary power unit cord was not removed. The brick wall was a contributing factor.NTSB NYC99FA140Accident · 4 fatalField investigationFinal reportSikorsky S-76A · Jackson, KYthe failure of the PIC to adequately supervise the SIC, and maintain a positive climb. Factors were the fog and dark night.NTSB IAD97FA123Accident · 1 fatalField investigationFinal reportFairchild Hiller FH-1100 · Pittsfield, MAThe first pilot's improper procedures for an autorotation, and improper flare which resulted in a hard landing. Also causal was the second pilot's inadequate remedial action.NTSB SEA97LA029Accident · Serious injuriesLimited investigationFinal reportBell 206B3 · Ballston, ORa loss of control for undetermined reasons.NTSB LAX95LA310Accident · No injuriesLimited investigationFinal reportBell 206BIII · Carmel Valley, CAthe pilot's failure to maintain an adequate clearance from obstructions while hovering.NTSB DEN93LA060Accident · Minor injuriesLimited investigationFinal reportBell 206L-1 · Mead, COA failure by the pilot in command to compensate for wind conditions and maintain control of the helicopter. A factor was: unfavorable wind conditions.NTSB NYC90LA072Accident · Minor injuriesLimited investigationFinal reportBell 206B · Norwood, MAImproper planning/decision by the pilot. The turbulence was a related factor.NTSB BFO87LA047Accident · Minor injuriesLimited investigationFinal reportHiller FH-1100 · Capron, VAThe plt made a 60 mph power descent landing apch. When the helicopter descended to a height of about 10 ft AGL, the plt raised collective and applied left rudder pressure. The helicopter abruptly turned right. According to the plt, the helicopter did not…NTSB MIA87LA133Accident · Minor injuriesLimited investigationFinal reportBell 206L · Miami, FLUnlicensed pilot lost control of helicopter while in hover while attempting to steal the helicopter. The aircraft crashed to earth and rolled over. The pilot was on probation for attempting to steal a helicopter on a previous occasion. The plt received minor…NTSB LAX86LA226Accident · Minor injuriesLimited investigationFinal reportBell 206B · Los Angeles, CADuring a x-wind takeoff the downwind skid contacted the landing pad and the helicopter rolled over to the right. One person on the ground was injured by flying debris.NTSB DEN86LA007Accident · Serious injuriesLimited investigationFinal reportBell BH 206BII · Kremmling, COWhile maneuvering to observe wildlife, the pilot attempted to hover out of gnd effect in steep mtns terrain at 9800 ft MSL at 2550 lbs gw with a 7-10KT tailwind. According to acft hoge charts in the POH, the acft was not capable of hoge in the conditions of…NTSB DEN83LA200Accident · Serious injuriesLimited investigationFinal reportBell 206L-1 · Tucker, UTThe helicopter was being used on a seismic data acquistion operation. While landing by a road in mountainous terrain at an elevation of aprx 8400 ft, the helicopter was observed to approach to a hover over the roadway. A considerable amount of dust was blown…NTSB FTW83LA132Accident · Serious injuriesLimited investigationFinal reportBell 206L-1 · Shipshoal 295Reportedly, the winds were variable a 2 to 4 KTS as the plt began his approach to an off-shore oil rig. He stated that he chose to terminate the landing from a 4 ft hover. At aprx 15 ft above & 5 ft short of the helipad, the helicopter began to drop at an…