# NTSB investigations: Lycoming HI0-360 series 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. Page 1 of 2 · 54 cases ## Latest cases - [NTSB WPR25LA010](https://openairdocs.org/ntsb/WPR25LA010.md): Enstrom Helicopter 280C · Vale, OR · Accident · No injuries · Class 4 · Limited · Final report · Oct 9, 2024 · N646H · Substantial damage > The pilot’s failure to maintain engine and rotor rpm during takeoff, that resulted in a hard landing. - [NTSB ERA21LA339](https://openairdocs.org/ntsb/ERA21LA339.md): Enstrom 280 · Port Orange, FL · Accident · No injuries · Class 3 · Limited · Final report · Aug 21, 2021 · N9285 · Substantial damage > The failure of the tail rotor drive shaft at the coupling due to torsionally applied shear stress. - [NTSB ERA21LA309](https://openairdocs.org/ntsb/ERA21LA309.md): Enstrom 280 · Colchester, VT · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 30, 2021 · N36DK · Destroyed > An in-flight fire originating in the engine compartment near the turbocharger from a source that could not be determined, which resulted in a loss of engine power and led to an autorotation and a hard landing. - [NTSB CEN20LA261](https://openairdocs.org/ntsb/CEN20LA261.md): Enstrom 280 · Des Moines, IA · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 4, 2020 · N282SH · Destroyed > The partial loss of rotor and engine speed during approach for landing, which resulted in an autorotation and impact with terrain. The reason for the partial loss of rotor and engine speed could not be determined based on the available evidence. Contributing… - [NTSB WPR20LA191](https://openairdocs.org/ntsb/WPR20LA191.md): Enstrom 280 · Hayden, ID · Accident · 1 fatal · Class 3 · Limited · Final report · Jun 24, 2020 · N280MM · Destroyed > The total loss of power while maneuvering at low altitude due to the detonation of two engine cylinders and damaged spark plugs. - [NTSB CEN18LA167](https://openairdocs.org/ntsb/CEN18LA167.md): Enstrom Helicopter 280C · Kerens, TX · Accident · Serious injuries · Limited investigation · Final report · May 10, 2018 · N67RE · Substantial damage > The total loss of engine power due to fuel exhaustion and the pilot’s inadequate in-flight fuel management. - [NTSB CEN16IA238](https://openairdocs.org/ntsb/CEN16IA238.md): Enstrom 280 · Zeeland, MI · Incident · No injuries · Incident investigation · Final report · Jun 27, 2016 · N518EG · Minor damage > The exhaust band clamp failure, which resulted in an engine fire due to hot exhaust gases entering the engine compartment. - [NTSB CEN15FA126](https://openairdocs.org/ntsb/CEN15FA126.md): Enstrom 280FX · Erie, CO · Accident · 2 fatal · Field investigation · Final report · Jan 26, 2015 · N86235 · Destroyed > An in-flight failure of the helicopter's #2 main rotor spindle due to undetected fatigue cracking, which resulted in an in-flight breakup. Contributing to failure were the nonconforming thread root radius of the spindle and the manufacturer's failure to… - [NTSB WPR14CA101](https://openairdocs.org/ntsb/WPR14CA101.md): Enstrom Helicopter 280C · Showlow, AZ · Accident · No injuries · Data collection · Final report · Jan 21, 2014 · N51683 · Substantial damage > The pilot's failure to maintain main rotor RPM during the takeoff run in a high density altitude environment, which resulted in a loss of aircraft control and collision with terrain. - [NTSB WPR11FA426](https://openairdocs.org/ntsb/WPR11FA426.md): Enstrom 280FX · Heber City, UT · Accident · Serious injuries · Field investigation · Final report · Sep 3, 2011 · N280AD · Substantial damage > The pilot’s failure to ensure that there was sufficient fuel onboard to conduct the flight, which resulted in a loss of engine power due to fuel exhaustion. Contributing to the severity of the passengers’ injuries was the operator’s failure to provide… - [NTSB WPR09LA261](https://openairdocs.org/ntsb/WPR09LA261.md): Enstrom Helicopter 280C · Ogden, UT · Accident · No injuries · Limited investigation · Final report · May 25, 2009 · N5699N · Substantial damage > The pilot's improper use of the helicopter's collective both during the takeoff sequence and while attempting remedial action in response to an engine over-boost condition, which resulted in a hard precautionary landing. - [NTSB WPR09LA156](https://openairdocs.org/ntsb/WPR09LA156.md): Enstrom 280FX · Wendover, UT · Accident · No injuries · Limited investigation · Final report · Mar 19, 2009 · N280AD · Substantial damage > A loss of engine power due to fuel exhaustion, which resulted from an inadequate preflight inspection by both pilots and their failure to ensure that adequate fuel was on board for the flight. Contributing to the accident was the flight instructor's… - [NTSB ATL07LA088](https://openairdocs.org/ntsb/ATL07LA088.md): Enstrom 280FX · Taylorsville, KY · Accident · No injuries · Limited investigation · Final report · Jun 11, 2007 · N93GP · Substantial damage > The pilot's improper prefight inspection of the helicopter. - [NTSB NYC06LA175](https://openairdocs.org/ntsb/NYC06LA175.md): Enstrom 280C · Danville, WV · Accident · Minor injuries · Limited investigation · Final report · Jul 15, 2006 · N5691B · Substantial damage > A partial failure of the override clutch assembly. A contributing factor to the accident was the manufacturer's inadequate inspection procedures of the override clutch assembly following a tail rotor strike. - [NTSB DEN06CA048](https://openairdocs.org/ntsb/DEN06CA048.md): Enstrom 280F · Peetz, CO · Accident · No injuries · Data collection · Final report · Mar 15, 2006 · N811Z · Substantial damage > The pilot's failure to maintain aircraft control while maneuvering resulting in an impact with terrain. Contributing factors were the gusty winds, downdrafts, and box canyon. - [NTSB IAD05LA122](https://openairdocs.org/ntsb/IAD05LA122.md): Enstrom 280C · Saulsville, WV · Accident · Serious injuries · Limited investigation · Final report · Aug 12, 2005 · N5691B · Substantial damage > The pilot's inadequate remedial action following a loss of control during the landing approach. - [NTSB IAD05CA027](https://openairdocs.org/ntsb/IAD05CA027.md): Enstrom 280C · Pedricktown, NJ · Accident · Minor injuries · Data collection · Final report · Dec 30, 2004 · N175BM · Substantial damage > The pilot's failure to maintain control of the helicopter during the takeoff and his failure to flare during the autorotation. - [NTSB FTW03LA102](https://openairdocs.org/ntsb/FTW03LA102.md): Enstrom 280FX · Ruston, LA · Accident · No injuries · Limited investigation · Final report · Mar 2, 2003 · N383MA · Substantial damage > The separation of the upper tail cone as a result of a fractured bolt due to fatigue. - [NTSB FTW02LA138](https://openairdocs.org/ntsb/FTW02LA138.md): Enstrom 280FX · Alsatia, LA · Accident · No injuries · Limited investigation · Final report · Apr 29, 2002 · N383MA · Substantial damage > The main rotor contact to the tail boom resulting from the pilot leaving the helicopter unattended while the rotors were engaged. - [NTSB MIA02FA026](https://openairdocs.org/ntsb/MIA02FA026.md): Enstrom 280FX · Tallassee, AL · Accident · 2 fatal · Field investigation · Final report · Nov 22, 2001 · N280XF · Destroyed > The failure of the pilot to maintain a safe altitude above terrain and maintain a visual lookout resulting in the helicopter colliding with power transmission lines and crashing into a river. A factor in the accident was the power transmission lines not being… - [NTSB NYC00LA174](https://openairdocs.org/ntsb/NYC00LA174.md): Enstrom 280 FX · Springdale, OH · Accident · No injuries · Limited investigation · Final report · Jun 23, 2000 · N383MA · Substantial damage > The pilot's inadequate preflight of the helicopter, and his subsequent failure to monitor his fuel supply, which resulted in a power loss due to fuel exhaustion, over unsuitable terrain. - [NTSB CHI00LA002](https://openairdocs.org/ntsb/CHI00LA002.md): Enstrom EN-28 · Indianapolis, IN · Accident · Minor injuries · Limited investigation · Final report · Oct 2, 1999 · N602H · Substantial damage > The pilot's attempted operation of the helicopter with known deficiencies, and his improper autorotation to landing. Factors were one fouled spark plug and another partially failed spark plug in the same cylinder, and the construction area. - [NTSB DEN99LA173](https://openairdocs.org/ntsb/DEN99LA173.md): Enstrom 280C · Longmont, CO · Accident · No injuries · Limited investigation · Final report · Sep 30, 1999 · N84DH · Substantial damage > An inaccurate touchdown during a full autorotation, which resulted in main rotor flex which cut off the tail boom. Factors were the pilot's lack of total experience in helicopters and high density altitude. - [NTSB DEN99LA084](https://openairdocs.org/ntsb/DEN99LA084.md): Enstrom 280C · Baggs, WY · Accident · No injuries · Limited investigation · Final report · May 22, 1999 · N535H · Substantial damage > The pilot not maintaining the main rotor's RPM. Factor's were the high density altitude, and the mountainous/hilly terrain. - [NTSB IAD97GA049](https://openairdocs.org/ntsb/IAD97GA049.md): Enstrom 280C · Lucasville, OH · Accident · Serious injuries · Final report · Feb 19, 1997 · N51662 · Substantial damage > The pilot in command failure to maintain rotor rpm. - [NTSB FTW96LA291](https://openairdocs.org/ntsb/FTW96LA291.md): Enstrom 280C · Castle Rock, CO · Accident · No injuries · Limited investigation · Final report · Jul 3, 1996 · N51763 · Substantial damage > Total failure of the magneto. A factor was the pilot operating the helicopter with a known deficiency. - [NTSB NYC96FA003](https://openairdocs.org/ntsb/NYC96FA003.md): Enstrom 280C · Quakertown, PA · Accident · 2 fatal · Field investigation · Final report · Oct 6, 1995 · N976BT · Destroyed > improper installation of the magneto by maintenance personnel, which resulted in the loss of ignition and the loss of engine power. A factor relating to the accident was: the lack of suitable terrain for an emergency landing. - [NTSB FTW95LA356](https://openairdocs.org/ntsb/FTW95LA356.md): Enstrom 280C · Houston, TX · Accident · No injuries · Limited investigation · Final report · Aug 21, 1995 · N911BT · Substantial damage > The flight instructor's poor judgement, and his disregard of the owner's objection to air taxi into the hangar. - [NTSB SEA94LA179](https://openairdocs.org/ntsb/SEA94LA179.md): Kaman HH43F · John Day, OR · Accident · Serious injuries · Limited investigation · Final report · Jul 19, 1994 · N324WN · Substantial damage > Failure of a turbine compressor wheel. The lack of suitable terrain for an autorotation/forced landing was a factor. - [NTSB LAX94LA239](https://openairdocs.org/ntsb/LAX94LA239.md): Enstrom 280C · California City, CA · Accident · No injuries · Limited investigation · Final report · Jun 5, 1994 · N123MT · Substantial damage > the pilot's inadequate compensation for the gusty wind conditions and his subsequent failure to maintain control of the helicopter. - [NTSB SEA92LA112](https://openairdocs.org/ntsb/SEA92LA112.md): Enstrom 280FX · Wenatchee, WA · Accident · No injuries · Limited investigation · Final report · May 30, 1992 · N86239 · Substantial damage > The pilot in command's inadequate visual lookout. Factors contributing to the accident were: object (fence post) and windshield dirty (foggy) - [NTSB CHI91DCJ05](https://openairdocs.org/ntsb/CHI91DCJ05.md): Mcdonnell Douglas 269A · Harvard, NE · Accident · No injuries · Final report · Aug 7, 1991 · N48298 · Substantial damage > The pilot's failure to maintain adequate rotor RPM during aerial application maneuvers. A related factor was the pilot's inattention. - [NTSB LAX90LA121](https://openairdocs.org/ntsb/LAX90LA121.md): Enstrom F-28C · Canyon Lake, CA · Accident · No injuries · Limited investigation · Final report · Mar 18, 1990 · N554H · Substantial damage > The pilot to maintain proper rotor RPM during a practice autorotation. Contributing to the accident was the uneven terrain selected by the pilot to conduct practice touch maneuvers. - [NTSB DEN89LA120](https://openairdocs.org/ntsb/DEN89LA120.md): Enstrom 280C · Colorado Spgs, CO · Accident · Minor injuries · Limited investigation · Final report · May 17, 1989 · N624H · Substantial damage > Inadequate compensation for the wind conditions by the pilot. The high density altitude and wind conditions were contributing factors. - [NTSB DEN87LA245](https://openairdocs.org/ntsb/DEN87LA245.md): Enstrom 280C · Bountiful, UT · Accident · Serious injuries · Limited investigation · Final report · Sep 26, 1987 · N5692D · Destroyed > While on a local low level pleasure flt the plt failed to see power lines and an in flight collision with the lines occurred severing the right skid and 90 degree gear box from the acft. A semi-autorotative crash occurred on the bank of a irrigation reservoir. - [NTSB NYC87LA012](https://openairdocs.org/ntsb/NYC87LA012.md): Enstrom 280C · Newport, RI · Accident · 1 fatal · Limited investigation · Final report · Dec 11, 1986 · N647H · Substantial damage > Aircraft descended and collided with water when the pilot attempted to regain visual ground reference when weather deteriorated. No plt acc report was received. Plt time was not reported or available. - [NTSB NYC86LA107](https://openairdocs.org/ntsb/NYC86LA107.md): Enstrom F-280C · Ridgefield, NJ · Accident · No injuries · Limited investigation · Final report · Apr 18, 1986 · N51721 · Substantial damage > Seconds after an over-water takeoff from a shoreline helipad the acft impacted the water and sank. The pilot and pax escaped from the submerged acft and were not injured. The pilot claimed that he had a split needle in which the rotor RPM deteriorated. The… - [NTSB NYC85FA015](https://openairdocs.org/ntsb/NYC85FA015.md): Enstrom 280C · Butler, PA · Accident · 2 fatal · Field investigation · Final report · Oct 28, 1984 · N51686 · Destroyed > The helicopter struck the static line of a high voltage transmission line while on a flt to photograph an apartment complex. The owner of the complex accompanied the plt on the flt, there after the acft was to be used for passenger sightseeing flts as part of… - [NTSB SEA84FA063](https://openairdocs.org/ntsb/SEA84FA063.md): Enstrom 280C · Middleton, ID · Accident · 2 fatal · Field investigation · Final report · Feb 29, 1984 · N51715 · Destroyed > The acft collided with the terrain during a test flt. Witnesses observed the acft rotate about 180 degrees about its vertical axis go nose low and descend vertically to the ground. A noise change described as a 'sputter' or tone change' was heard during this… - [NTSB SEA83LA194](https://openairdocs.org/ntsb/SEA83LA194.md): Enstrom 280C · N. Hailey, ID · Accident · No injuries · Limited investigation · Final report · Aug 25, 1983 · N999TP · Substantial damage > The plt reported that during takeoff from a county road (elevation 5500 ft), he allowed the RPM to drop 'below green.' Reportedly, he had a choice of either setting the helicopter down on the road or flying down a slope to gain airspeed. He elected to land on… - [NTSB FTW83LA287](https://openairdocs.org/ntsb/FTW83LA287.md): Enstrom 280C · Frisco, TX · Accident · No injuries · Limited investigation · Final report · Jun 17, 1983 · N51738 · Substantial damage > The plt reported that during flt, the low pressure fuel light illuminated & the nose of the helicopter yawed to the left as if the eng had lost power. He made a precautionary landing in a soft, plowed field with a forward speed of about 10 to 15 mph. During… - [NTSB LAX83LA248](https://openairdocs.org/ntsb/LAX83LA248.md): Enstrom 280C · Goshen, CA · Accident · Minor injuries · Limited investigation · Final report · May 24, 1983 · N51763 · Substantial damage > About 5 min after taking off, the plt noticed a sudden loss of power to the tail rotor. He made an emergency landing in an alfalfa field. He reported that during an autorotative landing, he had insufficient collective to flare properly. Subsequently, the main… - [NTSB LAX83LA134](https://openairdocs.org/ntsb/LAX83LA134.md): Enstrom F280C · Concord, CA · Accident · Minor injuries · Limited investigation · Final report · Mar 11, 1983 · N5691H · Substantial damage > The helicopter collided with a tree during a landing after a decay in rotor RPM during takeoff. According to the pilot the acft was facing southeast prior to departure and the pilot estimated that the wind was from the northwest at 8 KTS. Following a pedal… - [NTSB DEN82DA072](https://openairdocs.org/ntsb/DEN82DA072.md): Enstrom 280-C · Granger, WY · Accident · No injuries · Final report · Apr 26, 1982 · N629H · Substantial damage > The aircraft's engine backfired and quit during takeoff. The pilot cleared a fence and during the forced landing the gear collapsed. No engine malfunction or failure could be found. - [NTSB DEN82DTM08](https://openairdocs.org/ntsb/DEN82DTM08.md): Enstrom 280C · Midway, UT · Accident · No injuries · Final report · Jan 2, 1982 · N51735 · Destroyed > The aircraft crashed while being moved about 150 ft from the parking area to a storage building. There was about 2 1/2 ft of fresh snow on the ground. The snow had been cleared from the parking area in front of the storage building. However, a snow cat had… - [NTSB LAX81FUJ74](https://openairdocs.org/ntsb/LAX81FUJ74.md): Enstrom 280C · Mesa, AZ · Accident · No injuries · Closed · Jun 25, 1981 · N535H · Substantial damage - [NTSB ATL80FIG15](https://openairdocs.org/ntsb/ATL80FIG15.md): Enstrom 280C · Arbutus, MD · Accident · No injuries · Closed · Aug 21, 1980 · N79ER · Substantial damage - [NTSB LAX80FXQ06](https://openairdocs.org/ntsb/LAX80FXQ06.md): Enstrom 280C · Carson City, NV · Accident · Serious injuries · Closed · Sep 8, 1979 · N554H · Substantial damage - [NTSB LAX78FUK09](https://openairdocs.org/ntsb/LAX78FUK09.md): Enstrom 280C · Kingman, AZ · Accident · Serious injuries · Closed · Sep 24, 1978 · N665H · Destroyed - [NTSB SEA78DYA16](https://openairdocs.org/ntsb/SEA78DYA16.md): Enstrom 280C · Boise, ID · Accident · No injuries · Closed · Jul 19, 1978 · N123MT · Substantial damage Next page: https://openairdocs.org/ntsb.md?engine=41553&page=2 ## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41553')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=41553 --- 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.