NTSB investigations
12 cases where NTSB found Tail rotor gearbox.
Cases per year
| 2008 | 2 |
|---|---|
| 2012 | 2 |
| 2013 | 2 |
| 2015 | 2 |
| 2016 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 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 f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f.\"findingCode\", '01046520')) 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 f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '01046520')) 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 WPR22LA084Accident · No injuriesClass 3 · LimitedFinal reportBell UH-1E · Gustine, CAFailure of the 90° gearbox due to the lack of lubricating oil, which resulted in a loss of rotational drive to the tail rotor and a subsequent loss of control of the helicopter.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 ERA20LA310Accident · No injuriesClass 3 · LimitedFinal reportRobinson R22 · Fort Myers, FLForeign object damage of the turning tailrotor by a soft-bodied object, which resulted in the sudden stoppage of the tailrotor and the catastrophic failure of the tailrotor assembly and its mount structure.NTSB WPR17LA002Accident · Minor injuriesLimited investigationFinal reportTamarack Helicopters UH-1H · Gila Bend, AZThe separation of the 90° tail rotor gearbox assembly as a result of fatigue to the tail rotor gearbox input quill assembly attachment studs due to the helicopter experiencing highly repetitive agricultural flight profiles for which it was not designed.NTSB ANC15LA073Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 · Fort Glenn, AKThe separation of the tail rotor gearbox from the tailboom attachment point due to overstress loads imposed by a tail rotor blade imbalance as the result of impact with an undetermined object during low-level flight operations.NTSB CEN15LA379Accident · Minor injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Ketchum, OKThe separation of the tail rotor gearbox from the tailboom aft bulkhead due to overstress loads imposed by a blade imbalance from an in-flight impact with an undetermined object.NTSB ANC13TA076Accident · No injuriesFinal reportBell UH-1B · Tok, AKThe failure of the tail rotor crosshead bearing, which resulted in a loss of tail rotor control.NTSB CEN13FA192Accident · 3 fatalField investigationFinal reportSikorsky S-76A++ · Grand Lake, LAFracture of the red tail rotor blade spar, which resulted in the separation and departure of the red tail rotor blade from the helicopter and subsequent compromised tail gearbox. The red tail rotor blade was not recovered, thus the cause of the initial…NTSB WPR13FA006Accident · Minor injuriesField investigationFinal reportGarlick Helicopters UH-1H · Shady Cove, ORThe separation of the tail rotor gearbox and tail rotor assembly as a result of fatigue to the tail rotor gearbox input quill assembly attachment studs.NTSB CEN12LA120Accident · Serious injuriesLimited investigationFinal reportContinental Copters 47G2 · Lohn, TXThe improper installation of the tail rotor gearbox by maintenance personnel, which led to accelerated wear of the ring and pinion gears, resulting in the loss of tail rotor effectiveness and subsequent forced landing.NTSB LAX08LA183Accident · Minor injuriesLimited investigationFinal reportRobinson R44 II · Topanga, CAThe in-flight separation of the tail rotor gear box for an undetermined reason. Contributing to the accident was the hilly terrain, which was unsuitable for a forced landing.NTSB DFW08LA100Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Quinton, OKAn undetermined mechanical malfuction associated with the tail rotor drive system which led to a loss of control.