# NTSB investigations: Lycoming VO-435 series, FL 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 ERA25LA167](https://openairdocs.org/ntsb/ERA25LA167.md): Hiller UH12E · Rockledge, FL · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Apr 6, 2025 · N48263 · Substantial damage > On April 6, 2025, about 1020 eastern daylight time, a Hiller UH-12E, N48263, was substantially damaged when it was involved in an accident near Rockledge, Florida. The private pilot and passenger sustained serious injuries. The helicopter was operated as a… - [NTSB GAA20CA062](https://openairdocs.org/ntsb/GAA20CA062.md): Bell 47G · Groveland, FL · Accident · No injuries · Data collection · Final report · Nov 7, 2019 · N6746D · Substantial damage > The student pilot's improper cyclic input after a reported hydraulic failure, the reason for which could not be determined, and his failure to follow the emergency procedures, which resulted in a hard landing. - [NTSB ERA14FA066](https://openairdocs.org/ntsb/ERA14FA066.md): Texas Helicopter M74L · Sebring, FL · Accident · 1 fatal · Field investigation · Final report · Dec 6, 2013 · N1001N · Destroyed > A partial loss of engine power as a result of contamination of the engine’s fuel supply, and the pilot’s impaired performance due to his use of diphenhydramine, which resulted in his inability to complete a forced or precautionary autorotative landing… - [NTSB MIA04FA008](https://openairdocs.org/ntsb/MIA04FA008.md): Bell 47G-2A-1 · Balm, FL · Accident · 2 fatal · Field investigation · Final report · Oct 21, 2003 · N73979 · Destroyed > The pilot's intentional buzzing and his failure to maintain altitude/clearance which resulted in an in-flight collision with a building. - [NTSB MIA02LA101](https://openairdocs.org/ntsb/MIA02LA101.md): Bell 47G-2 · Bunnell, FL · Accident · No injuries · Limited investigation · Final report · May 28, 2002 · N6746D · Substantial damage > The failure of the student pilot to secure the rotorcraft floorboard mounted ballast, resulting in shifting of the ballast on liftoff, and the subsequent dynamic rollover. - [NTSB ATL02LA094](https://openairdocs.org/ntsb/ATL02LA094.md): Bell 47G-5A · La Belle, FL · Accident · No injuries · Limited investigation · Final report · Apr 26, 2002 · N14838 · Substantial damage > The pilot's failure to maintain clearance of a tree while maneuvering, which resulted in an in-flight collision with the tree and subsequent uncontrolled descent and collision with terrain. - [NTSB MIA02FA045](https://openairdocs.org/ntsb/MIA02FA045.md): Piper PA-32-260 · Jacksonville, FL · Accident · 4 fatal · Field investigation · Final report · Dec 13, 2001 · N7701J · Destroyed > The pilot becoming spatially disoriented and losing control of the airplane during a missed approach resulting in the airplane descending uncontrolled and colliding with trees and the ground. - [NTSB MIA00LA176](https://openairdocs.org/ntsb/MIA00LA176.md): Bell 47G-2 · Fort Walton Bch, FL · Accident · No injuries · Limited investigation · Final report · May 27, 2000 · N96MB · Substantial damage > The unsuitable terrain encountered by the pilot-in-command during the forced landing and the loss of engine power for undetermined reasons. - [NTSB MIA98LA154](https://openairdocs.org/ntsb/MIA98LA154.md): Bell 47G-2 · Fort Walton Bch, FL · Accident · Minor injuries · Limited investigation · Final report · May 9, 1998 · N6714D · Substantial damage > The loss of engine power for undetermined reasons. - [NTSB MIA93LA027](https://openairdocs.org/ntsb/MIA93LA027.md): Bell 47-G5A · Belle Glade, FL · Accident · Minor injuries · Limited investigation · Final report · Dec 7, 1992 · N7925J · Substantial damage > The improper in flight decision of the pilot in command to attempt an agricultural turn with insufficient altitude to accomplish the maneuver. Contributing to the accident was the pilot's overconfidence in his abilities. - [NTSB MIA92T#A01](https://openairdocs.org/ntsb/MIA92T%23A01.md): Continental Copters Tomcat MK6B · Punta Gorda, FL · Accident · No injuries · Class 3 · Final report · Jun 25, 1992 · N17H · Substantial damage - [NTSB MIA91LA215](https://openairdocs.org/ntsb/MIA91LA215.md): Bell 47G2A · Immokalee, FL · Accident · No injuries · Limited investigation · Final report · Sep 7, 1991 · N7573 · Substantial damage > The improper use of the flight controls by the pilot in command, which resulted in a collision with the ground and a nose over. - [NTSB MIA91TL#03](https://openairdocs.org/ntsb/MIA91TL%2303.md): Bell 47-G5A · Titusville, FL · Accident · No injuries · Class 3 · Final report · Mar 27, 1991 · N7925J · Substantial damage - [NTSB MIA89LA213](https://openairdocs.org/ntsb/MIA89LA213.md): Bell 47G-2 · Sarasota, FL · Accident · No injuries · Limited investigation · Final report · Aug 5, 1989 · N3550 · Substantial damage > The student pilot's inadequate preflight planning/preparation, which resulted in fuel exhaustion due to an inadequate supply of fuel. Factors related to the accident were: the student pilot's lack of total experience & tree(s) in the emergency landing area. - [NTSB MIA88LA186](https://openairdocs.org/ntsb/MIA88LA186.md): Continental Copters MK6B · Callahan, FL · Accident · No injuries · Limited investigation · Final report · Jun 1, 1988 · N9080T · Substantial damage > While maneuvering the helicopter during an aerial application flt the eng quit. During the autorotative landing the helicopter landed hard. Examination of the eng revealed the accessory drive gear, which is attached to the crankshaft by 6 AN-4A bolts with the… - [NTSB MIA87FA236](https://openairdocs.org/ntsb/MIA87FA236.md): Cessna 152 · Opa Locka, FL · Accident · 1 fatal · Field investigation · Final report · Aug 31, 1987 · N48864 · 2 aircraft · Substantial damage > A student plt & instructor (CFI) in Cessna 152, N48864, took off & entered rgt traffic to practice lndgs on rwy 9R. Soonthereafter, a helicopter plt (h/p) in a bell 47G-2, N6728D, took off & entered rgt traffic to practice lndgs in a desig-nated helicopter… - [NTSB MIA86LA228](https://openairdocs.org/ntsb/MIA86LA228.md): Continental Copters Tomcat MK5A · Indiantown, FL · Accident · Minor injuries · Limited investigation · Final report · Aug 5, 1986 · N9086T · Substantial damage > The aerial application helicopter crashed just after lift-off after sustaining a power failure, the plt stated that he thought the reason for the failure could have been fuel starvation since he had observed some foreign matter in the fuel when he drained the… - [NTSB MIA85LA223](https://openairdocs.org/ntsb/MIA85LA223.md): Bell 47G-2 · Ochopee, FL · Accident · No injuries · Limited investigation · Final report · Aug 1, 1985 · N88AR · Substantial damage > The plt stated that he dropped his passenger off at a water station in the everglades, water taxied away from the station, accellerated up to 3100 RPM & just before he added collective pitch the transmission ass'y departed the helicopter, it rolled to the… - [NTSB MIA85FA016](https://openairdocs.org/ntsb/MIA85FA016.md): Bell 47G-5A · Belle Glade, FL · Accident · No injuries · Field investigation · Final report · Oct 22, 1984 · N59424 · Substantial damage > Acft wad parked with 3 ft clearance between main rotor and corner of hangar. Plt stated that on lift off a gust of wind blew acft toward hangar. Main rotor blades made contact. Ground crewman injured by flying debris. - [NTSB MIA83LA212](https://openairdocs.org/ntsb/MIA83LA212.md): Bell 47J · Labelle, FL · Accident · Minor injuries · Limited investigation · Final report · Aug 26, 1983 · N5824 · Substantial damage > While at an altitude of about 150 ft, the eng lost power. The plt initiated an autorotation, but during the landing, the main rotor struck trees & the helicopter was substantially damaged. The plt estimated there was 15 gal of fuel on board during the… - [NTSB MIA83LA196](https://openairdocs.org/ntsb/MIA83LA196.md): Bell 47G-2 · Miami, FL · Accident · No injuries · Limited investigation · Final report · Aug 5, 1983 · N471KC · Substantial damage > The student was a rated single eng, multiengine, land plt, but did not have a helicopter rating. During a dual instructional flt, he had just completed the final phase of an autorotation & the skids were on the ground, when he abruptly pulled the collective… - [NTSB MIA83LA069](https://openairdocs.org/ntsb/MIA83LA069.md): Bell 47G2 · Riverview, FL · Accident · Minor injuries · Limited investigation · Final report · Jan 29, 1983 · N74822 · Substantial damage > According to the pilot he lost control of the acft after a bird hit him on the right temple while flying at about 15 feet above the water. The acft was traveling at about 50 mph when the bird flew in through left door opening. The pilot lost control of the… - [NTSB MIA81FA053](https://openairdocs.org/ntsb/MIA81FA053.md): Hiller UH-12D · Miami Beach, FL · Accident · Minor injuries · Closed · Mar 20, 1981 · N62376 · Destroyed - [NTSB MIA81FKT31](https://openairdocs.org/ntsb/MIA81FKT31.md): Hiller Acft UH-12D · Miami, FL · Accident · No injuries · Closed · Mar 8, 1981 · N62362 · Substantial damage - [NTSB MIA81DLD04](https://openairdocs.org/ntsb/MIA81DLD04.md): Bell 47J · Yeehaw Jnction, FL · Accident · No injuries · Closed · Oct 13, 1980 · N16082 · Substantial damage - [NTSB MIA80FA069](https://openairdocs.org/ntsb/MIA80FA069.md): Hiller UH-12D · Miami Beach, FL · Accident · Serious injuries · Closed · Jun 15, 1980 · N9299Z · Substantial damage - [NTSB MIA79ELA24](https://openairdocs.org/ntsb/MIA79ELA24.md): Bell 47G3 · Palatka, FL · Accident · Serious injuries · Closed · Apr 24, 1979 · N49882 · Destroyed - [NTSB MIA79DKT49](https://openairdocs.org/ntsb/MIA79DKT49.md): Bell 47G · Miami, FL · Accident · No injuries · Closed · Mar 25, 1979 · N514SF · Destroyed - [NTSB MIA78DKT08](https://openairdocs.org/ntsb/MIA78DKT08.md): Hiller Acft UH-12D · Miami, FL · Accident · No injuries · Closed · Oct 22, 1977 · N9299Z · Substantial damage - [NTSB MIA77DLD51](https://openairdocs.org/ntsb/MIA77DLD51.md): EL Tomcat MK6A · Lake Wales, FL · Accident · Minor injuries · Closed · Apr 19, 1977 · N4774S · Substantial damage - [NTSB MIA77FKT05](https://openairdocs.org/ntsb/MIA77FKT05.md): Hiller UH-12D · Lake Worth, FL · Accident · No injuries · Closed · Oct 23, 1976 · N62401 · Substantial damage - [NTSB MIA76FKT61](https://openairdocs.org/ntsb/MIA76FKT61.md): Hiller UH-12D · Miami, FL · Accident · Minor injuries · Closed · Mar 15, 1976 · N62362 · Substantial damage - [NTSB MIA75DLD28](https://openairdocs.org/ntsb/MIA75DLD28.md): Bell 47G21A · Waverly, FL · Accident · No injuries · Closed · Oct 26, 1974 · N1161W · Substantial damage - [NTSB MIA74AM079](https://openairdocs.org/ntsb/MIA74AM079.md): Bell 47G-2 · Miami, FL · Accident · Serious injuries · Closed · Mar 14, 1974 · N4775S · Destroyed - [NTSB MIA74DLD71](https://openairdocs.org/ntsb/MIA74DLD71.md): Bell 47G5 · Arcadia, FL · Accident · No injuries · Closed · Mar 9, 1974 · N8197J · Substantial damage - [NTSB MIA73DLD54](https://openairdocs.org/ntsb/MIA73DLD54.md): Bell 47G-5 · Avon Park, FL · Accident · No injuries · Closed · Jan 27, 1973 · N1476W · Destroyed - [NTSB MIA72FKT48](https://openairdocs.org/ntsb/MIA72FKT48.md): Bell 47G · Ft Lauderdale, FL · Accident · Serious injuries · Closed · Jan 29, 1972 · N16414 · Destroyed - [NTSB MIA71DKT52](https://openairdocs.org/ntsb/MIA71DKT52.md): Bell 47G2A · Buckingham, FL · Accident · Minor injuries · Closed · Mar 31, 1971 · N73220 · Substantial damage - [NTSB MIA71FLD10](https://openairdocs.org/ntsb/MIA71FLD10.md): Bell 47G-5 · Frostproof, FL · Accident · Minor injuries · Closed · Aug 17, 1970 · N4096G · Destroyed - [NTSB MIA70FLD32](https://openairdocs.org/ntsb/MIA70FLD32.md): Bell 47-G2 · Kissimmee, FL · Accident · No injuries · Closed · Jun 19, 1970 · N6750D · Destroyed - [NTSB MIA70FLA11](https://openairdocs.org/ntsb/MIA70FLA11.md): Bell 47G-5 · Jasper, FL · Accident · Minor injuries · Closed · Mar 23, 1970 · N7841S · Substantial damage - [NTSB MIA70F0184](https://openairdocs.org/ntsb/MIA70F0184.md): Bell 47G-5 · Largo, FL · Accident · No injuries · Closed · Jul 23, 1969 · N4041G · Destroyed - [NTSB MIA66A0125](https://openairdocs.org/ntsb/MIA66A0125.md): Bell 47G-2 · Homestead, FL · Accident · Minor injuries · Closed · Apr 26, 1966 · N6774D · Substantial damage ## 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" = 'FL' 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 ('41525')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=41525&state=FL --- 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.