NTSB investigations: Hiller UH-12E
14 cases on aircraft the registry lists as Hiller UH-12E, where the sequence of events included Collision with terr/obj (non-CFIT). 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
| 2008 | 2 |
|---|---|
| 2010 | 5 |
| 2011 | 2 |
| 2013 | 1 |
| 2014 | 2 |
| 2015 | 1 |
| 2021 | 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.aircraft_model_code IN ('4360122', '4360137')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s.\"tier2Number\" = '470' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE \"isDefiningEvent\")))
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.aircraft_model_code IN ('4360122', '4360137')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s."tier2Number" = '470' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")))
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 ERA21LA386Accident · Minor injuriesClass 3 · LimitedFinal reportHiller UH-12E · Millen, GAThe improper reassembly of the tail rotor gearbox following maintenance, which resulted in fatigue failure of the input pinion gear shaft, and the subsequent loss of tail rotor drive.NTSB WPR15LA138Accident · No injuriesLimited investigationFinal reportHiller UH 12E · Firebaugh, CAA loss of engine power for reasons that could not be determined because postaccident examination of the engine did not reveal any anomalies that would have precluded normal operation.NTSB ERA14LA405Accident · Minor injuriesLimited investigationFinal reportHiller UH 12E · Cape May Court House, NJThe mechanic’s failure to detect excessive wear on the engine’s lateral snubber vibration mount during the latest annual inspection, which resulted in an in-flight engine failure and a subsequent forced landing.NTSB ERA14LA361Accident · No injuriesLimited investigationFinal reportHiller UH 12E · Wadesboro, NCA partial loss of engine power due to the failure of the No. 2 engine accessory gearbox bearing for reasons that could not be determined based on the available information.NTSB WPR14LA062Accident · No injuriesLimited investigationFinal reportHiller UH 12E · Chowchilla, CAThe failure of the torsional drive coupling, which resulted in a loss of drive to the main rotor system during low-altitude flight.NTSB WPR11LA244Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Stockton, CAThe pilot's failure to maintain clearance from obstacles.NTSB WPR11CA146Accident · No injuriesData collectionFinal reportHiller UH-12E · Colusa, CAThe pilot's failure to maintain an adequate airspeed and an inadvertent encounter with settling with power while flying downwind.NTSB WPR10CA466Accident · Minor injuriesData collectionFinal reportHiller UH-12E · Mecca, CAThe pilot's failure to maintain clearance from an obstacle while maneuvering.NTSB WPR10FA440Accident · 3 fatalField investigationFinal reportHiller UH 12E · Kamiah, IDIn-flight impact of a passenger's metal clipboard with the helicopter’s tail rotor, which resulted in destruction of the tail rotor and subsequent loss of control of the helicopter. The original location of the clipboard and how it became free could not be…NTSB ERA10LA383Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Holly Hill, SCMaintenance personnel's improper inspection and cleaning of the fuel nozzle, which resulted in a total loss of engine power.NTSB CEN10CA362Accident · Minor injuriesData collectionFinal reportHiller UH-12E · Grand Junction, COThe total loss of engine power for undetermined reasons.NTSB WPR10LA127Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Los Banos, CAA partial loss of engine power due to a failure of the throttle interconnect hardware, which resulted in a hard landing.NTSB CHI08CA252Accident · No injuriesData collectionFinal reportHiller UH-12E · Cokato, MNThe pilot did not visually identify and maintain clearance with the power lines, and the pilot's inability to maintain control of the helicopter once it contacted the power lines. Factors associated with the accident were the low altitude operations being…NTSB DEN08LA071Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · La Porte, TXThe loss of tail rotor effectiveness. Contributing factors were the sudden windshift to a tailwind, and the pilot initiating a hovering turn in ground effect.