# NTSB investigations: Lycoming T-53 series, CA NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. ## Latest cases - [NTSB WPR24LA299](https://openairdocs.org/ntsb/WPR24LA299.md): Williams Helicopter UH-1H · Colusa, CA · Accident · Serious injuries · Class 4 · Limited · Final report · Aug 30, 2024 · N710WD · Substantial damage > The pilot’s failure to set collective friction which resulted in collective bounce and subsequent loss of control. - [NTSB WPR24LA030](https://openairdocs.org/ntsb/WPR24LA030.md): Arrow Falcon Exporters UH-1H · Firebaugh, CA · Accident · No injuries · Class 3 · Limited · Final report · Nov 4, 2023 · N3053Q · Substantial damage > An on-ground fuel fire for reasons that could not be determined due to extensive thermal damage. - [NTSB WPR23LA118](https://openairdocs.org/ntsb/WPR23LA118.md): Bell UH-1B · Orland, CA · Accident · No injuries · Class 4 · Limited · Final report · Mar 2, 2023 · N234SJ · Substantial damage > The pilot’s inadequate fuel planning, which resulted in fuel exhaustion and a loss of engine power. - [NTSB WPR22LA084](https://openairdocs.org/ntsb/WPR22LA084.md): Bell UH-1E · Gustine, CA · Accident · No injuries · Class 3 · Limited · Final report · Jan 23, 2022 · N333XL · Substantial damage > Failure 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 GAA17CA355](https://openairdocs.org/ntsb/GAA17CA355.md): Bell UH1B · Williams, CA · Accident · No injuries · Data collection · Final report · Jun 21, 2017 · N6180A · Substantial damage > The pilot’s failure to maintain clearance from transmission wires while maneuvering at a low altitude during an agricultural application flight. - [NTSB WPR16LA104](https://openairdocs.org/ntsb/WPR16LA104.md): Bell UH 1B · Maxwell, CA · Accident · No injuries · Limited investigation · Final report · May 7, 2016 · N486SA · Substantial damage > A reduction in available engine power during takeoff due to a stuck hot air valve, which resulted in low rotor rpm and a forced landing. Contributing to the accident was the lack of dry film lubricant and the presence of corrosion on the hot air valve… - [NTSB WPR11LA423](https://openairdocs.org/ntsb/WPR11LA423.md): Arrow Falcon Exporters UH-1H · Stockton, CA · Accident · Minor injuries · Limited investigation · Final report · Sep 2, 2011 · N205PJ · Substantial damage > A total loss of engine power due to the separation of a tooth from the starter-generator drive gear, which resulted in failure of the engine oil pump and subsequent oil starvation. - [NTSB WPR09LA241](https://openairdocs.org/ntsb/WPR09LA241.md): Rotorcraft Development UH-1B · Richvale, CA · Accident · Serious injuries · Limited investigation · Final report · May 13, 2009 · N843M · Substantial damage > The pilot's failure to maintain control of the helicopter during takeoff for undetermined reasons. - [NTSB LAX07TA227](https://openairdocs.org/ntsb/LAX07TA227.md): Bell 205 A1++ · Happy Camp, CA · Accident · 1 fatal · Final report · Jul 23, 2007 · N205BR · Destroyed > the pilot's failure to maintain clearance with the trees during a long-line operation. Contributing factors were the Forest Service's inadequate communication between crews, failure to properly assess the safety of the intended drop zone, reduced visibility… - [NTSB SEA07LA154](https://openairdocs.org/ntsb/SEA07LA154.md): Bell UH-1B · Biggs, CA · Accident · No injuries · Limited investigation · Final report · Jun 12, 2007 · N2087S · Substantial damage > Loss of control during hover for undetermined reasons. - [NTSB LAX06LA134](https://openairdocs.org/ntsb/LAX06LA134.md): Bell UH-1H · Yuba City, CA · Accident · No injuries · Limited investigation · Final report · Apr 1, 2006 · N710WD · Substantial damage > The pilot's in-flight loss of control of the helicopter for undetermined reasons. A factor was the trees. - [NTSB LAX04LA015](https://openairdocs.org/ntsb/LAX04LA015.md): Bell UH-1B · Durham, CA · Accident · No injuries · Limited investigation · Final report · Oct 16, 2003 · N234SJ · Substantial damage > Separation of the power turbine shaft retaining bolt resulting in extensive power turbine area damage and a loss of shaft output power. - [NTSB LAX99LA283](https://openairdocs.org/ntsb/LAX99LA283.md): Bell UH-1B · Lost Hills, CA · Accident · No injuries · Limited investigation · Final report · Aug 25, 1999 · N999SJ · Substantial damage > Failure and separation of the 90-degree gearbox as a result of the disengagement of the pinion and gear teeth. The cause(s) of the pinion and gear disengagement were undetermined. - [NTSB LAX99TA066](https://openairdocs.org/ntsb/LAX99TA066.md): Bell 205A-1 · Van Nuys, CA · Accident · Serious injuries · Final report · Jan 3, 1999 · N58126 · Substantial damage > A loss of engine power due to an undetermined component failure in the second stage power turbine nozzle area. Factors in the accident were the mountainous/hilly nature of the terrain and the dark night lighting conditions which precluded the pilot from… - [NTSB LAX98GA127](https://openairdocs.org/ntsb/LAX98GA127.md): Bell 205A-1 · Los Angeles, CA · Accident · 4 fatal · Final report · Mar 23, 1998 · N90230 · Destroyed > An excessive bending load applied to the tail rotor blade assembly of an undetermined origin which produced a fatigue crack, the separation of the assembly, and a forced landing. Factors were the lack of suitable terrain to perform a forced landing, the… - [NTSB LAX97LA206](https://openairdocs.org/ntsb/LAX97LA206.md): Bell UH-1B · Heron, CA · Accident · No injuries · Limited investigation · Final report · Jun 11, 1997 · N888SJ · Destroyed > partial loss of engine power for undetermined reasons. A factor relating to the accident was that the engine lost power when the helicopter was outside (below) the limits of the height/velocity curve. - [NTSB LAX92T#A16](https://openairdocs.org/ntsb/LAX92T%23A16.md): Bell 204B · Big Sur, CA · Accident · No injuries · Class 3 · Final report · Aug 12, 1992 · N204CR · Substantial damage - [NTSB LAX86DVA06](https://openairdocs.org/ntsb/LAX86DVA06.md): Bell UH-1B · Chowchilla, CA · Accident · Minor injuries · Final report · Apr 16, 1986 · N910PD · Destroyed > While returning from a spraying operation the plt observed that the main transmission oil pressure gage indicated zero. The plt reported that the engine master caution did not illuminate and that the oil temperature gage was normal. The plt stated that he… - [NTSB LAX85FA115](https://openairdocs.org/ntsb/LAX85FA115.md): Bell 205A-1 · Newhall, CA · Accident · 1 fatal · Field investigation · Final report · Jan 18, 1985 · N830V · Destroyed > This helicopter collided with hilly terrain while circling at a low altitude. It was following another helicopter in a clockwise circular pattern at the time, and being filmed for the t.v. series 'air wolf'. One witness observed the helicopter decending in… - [NTSB LAX85LA105](https://openairdocs.org/ntsb/LAX85LA105.md): Bell 204 · Snelling, CA · Accident · No injuries · Limited investigation · Final report · Jan 11, 1985 · N99021 · Substantial damage > Plt vacated the acft with engine at idle & with the blades turning to refuel. The landing platform mounted on the 'nurse' truck was slippery from an oil & copper mixture used in the spraying operation. The helicopter started to slide & the plt reboarded just… - [NTSB LAX83LA022](https://openairdocs.org/ntsb/LAX83LA022.md): Bell UH-1B · Delano, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 28, 1982 · N15FC · Destroyed > The pilot was making a helicopter spray run and decended into trees on th irst pass after reloading. He got a low RPM light in a reduced power situation. No malfunctions were found. The pilot had made 34 similiar operations during this schedule. - [NTSB LAX82DA264](https://openairdocs.org/ntsb/LAX82DA264.md): Bell 204 · Delano, CA · Accident · No injuries · Final report · Jul 18, 1982 · N910PD · Destroyed > The acft was spraying for mediterranean fruit flies with another acft. Entering a "scissors" or opposite direction pattern with the second helicopter spraying in the opposite direction, the plt had to slow down in order to begin his swath at the completion of… ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql 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."eventStateOrRegion" = 'CA' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41552', '41549', '41587')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=41552&state=CA --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.