NTSB investigations
21 cases where the sequence of events included Ground resonance.
Cases per year
| 2008 | 1 |
|---|---|
| 2009 | 1 |
| 2010 | 1 |
| 2011 | 2 |
| 2012 | 4 |
| 2014 | 3 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 1 |
| 2021 | 1 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 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 s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.\"tier2Number\" = '232' 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 s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '232' 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
Run 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 ERA25LA255Accident · Minor injuriesClass 4 · LimitedFinal reportSchweizer 269C · Madisonville, KYThe pilot’s failure to take the appropriate corrective action for ground resonance, which resulted in a loss of helicopter control.NTSB ERA24LA399Accident · No injuriesClass 3 · LimitedFinal reportBell Textron Canada 505 · Marianna, FLThe student pilot’s failure to maintain rotor rpm during a simulated autorotation, which allowed for a resonance phenomenon to develop. Contributing to the accident was the flight instructor’s inadequate monitoring of the student pilot’s collective control…NTSB ERA23LA284Accident · Minor injuriesClass 3 · LimitedFinal reportSchweizer 269C · Macclenny, FLThe improper maintenance of the landing gear dampers and main rotor elastomeric dampers, resulting in ground resonance during an unsuccessful takeoff attempt with the helicopter near its maximum gross weight for the density altitude.NTSB ERA23LA289Accident · No injuriesClass 4 · LimitedFinal reportHughes 269A · Anderson, SCThe mechanics’ improper torquing of the main rotor blade dampers, which resulted in a ground resonance event during landing.NTSB ERA22LA091Accident · No injuriesClass 4 · LimitedFinal reportBell Helicopter Textron Canada 429 · Manhattan, NYThe pilots overapplication of flight controls during landing, which resulted in the rotor blades contacting the wire strike protection system and subsequent hard landing.NTSB ERA19LA173Accident · No injuriesClass 3 · LimitedFinal reportHughes 269B · Hampton, GAGround resonance during landing for reasons that could not be determined based on the available information.NTSB WPR18LA170Accident · Minor injuriesClass 3 · LimitedFinal reportSchweizer 269C · Las Vegas, NVThe pilot’s failure to take the appropriate corrective action for ground resonance, which resulted in a loss of helicopter control.NTSB CEN17LA229Accident · No injuriesLimited investigationFinal reportHughes 269C · Tallulah, LAThe pilot's failure to reset the cyclic trim before takeoff, which resulted in ground resonance.NTSB ERA16LA261Accident · No injuriesLimited investigationFinal reportSchweizer 269C · Calhoun, GAThe helicopter owner’s failure to ensure the helicopter’s airworthiness and the inadequate inspection and maintenance of the helicopter's landing gear dampers, which resulted in ground resonance during throttle application. Contributing to the damage of the…NTSB ERA14LA293Accident · Minor injuriesLimited investigationFinal reportSchweizer 269C-1 · Allentown, PAInadequate inspection and maintenance of the helicopter’s landing gear dampers, which resulted in ground resonance during helicopter shutdown.NTSB ANC14LA041Accident · No injuriesClass 3 · LimitedFinal reportAirbus/Eurocopter AS 350 B3 · Anchorage, AKThe pilot’s improper engine start procedure, which resulted in an overspeed of the engine and main rotor drive system.NTSB CEN14LA269Accident · No injuriesLimited investigationFinal reportSchweizer 269C · Temple, TXGround resonance due to maintenance personnel’s improper inspection of the landing gear dampers, which resulted in the dampers operating outside of allowable limits.NTSB WPR13TA051Accident · Minor injuriesFinal reportEurocopter AS350B3 2B1 · Newfield, AZThe pilot's distraction while retrieving an item behind him while the helicopter was on the ground with the engine running, which led to his aggressive overapplication of the flight controls after experiencing a ground resonance condition and subsequent loss…NTSB CEN12LA343Accident · No injuriesLimited investigationFinal reportSchweizer 269C · Denver, COThe inadequately overhauled landing gear dampers that allowed initiation of a ground resonance event from which the pilot was unable to recover. Contributing to the accident was the overhaul facility's failure to identify the overcharged dampers and a lack of…NTSB CEN12LA353Accident · No injuriesLimited investigationFinal reportSchweizer 269C-1 · Chesterfield, MOThe undercharged and overcharged landing gear dampers, which allowed initiation of the ground resonance event from which the pilot was unable to recover due to his limited experience in helicopters. Contributing to the accident was the ineffective damper…NTSB CEN12LA247Accident · No injuriesLimited investigationFinal reportHughes 269A · Grinnell, IAThe pilot's improper liftoff technique, which resulted in ground resonance, and the pilot's delayed recognition of the ground resonance.NTSB CEN12CA031Accident · No injuriesData collectionFinal reportHughes 269A · Fort Worth, TXThe inadvertent entry into ground resonance after a hovering autorotation.NTSB ERA11LA428Accident · Minor injuriesLimited investigationFinal reportSchweizer 269C · Darlington, MDInadequate maintenance of the helicopter's landing gear dampers, which resulted in a main rotor out-of-balance condition and ground resonance encounter.NTSB CEN10CA352Accident · No injuriesData collectionFinal reportAerospatiale AS350 · Lake Charles, LAThe flight instructor’s inadvertent entry into ground resonance when demonstrating a hydraulic failure running landing, which resulted in substantial damage to the helicopter. Contributing to the accident was the pilot's and instructor pilot's failure to…NTSB ERA09WA478Accident · No injuriesForeign investigationAgusta A109E · Ras Tanajib, Saudi ArabiaOn August 22, 2009, at 0506 universal coordinated time, an Agusta 109E helicopter, N906AH, operated by Saudi Aramco Aviation, sustained substantial damage during landing and a post crash fire at barge Arabyia 4, in the Persian Gulf, near Ras Tanajib, Saudi…NTSB NYC08CA195Accident · Minor injuriesData collectionFinal reportSchweizer 269C · Mt. Olive, ALThe flight instructor's inadequate remedial action following an encounter with ground resonance.