# NTSB investigations: Lycoming HIO-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 3 of 8 · 390 cases ## Cases, newest first - [NTSB DFW07CA037](https://openairdocs.org/ntsb/DFW07CA037.md): Hughes 269B · Houma, LA · Accident · No injuries · Data collection · Final report · Dec 11, 2006 · N9396F · Substantial damage > A partial loss of engine power as a result of a cracked engine cylinder and broken spark plug which resulted in a hard landing. A factor was that it was not possible to attain proper rotor RPM. - [NTSB LAX06LA290](https://openairdocs.org/ntsb/LAX06LA290.md): Schweizer 269C-1 · Van Nuys, CA · Accident · No injuries · Limited investigation · Final report · Sep 10, 2006 · N323CP · Substantial damage > Inadequate maintenance adjustment and missing mixture spring, which resulted in a loss of engine power during approach. - [NTSB CHI06CA168](https://openairdocs.org/ntsb/CHI06CA168.md): Schweizer 269C · Grand Forks, ND · Accident · No injuries · Data collection · Final report · Jun 17, 2006 · N1675U · Substantial damage > The dual student's failure to maintain rotor speed during the recovery from the intentional autorotation and the flight instructor's delayed remedial action. Contributing factors were the flight crew's intentional autorotation and dual student's misjudged… - [NTSB CHI06TA148](https://openairdocs.org/ntsb/CHI06TA148.md): Schweizer 269C · Schererville, IN · Accident · Minor injuries · Final report · Jun 6, 2006 · N54LC · Substantial damage > The pilot's improper autorotation following an actual loss of engine power during a practice autorotation, which resulted in a hard landing. A factor associated with the accident was the loss of engine power at the beginning of the practice autorotation for… - [NTSB CHI06LA138](https://openairdocs.org/ntsb/CHI06LA138.md): Hughes 269A · Berlin Center, OH · Accident · 1 fatal · Limited investigation · Final report · May 28, 2006 · N69HU · Substantial damage > The pilot flew at a low altitude and failed to maintain clearance from the wire. A factor was the wire. - [NTSB ATL06LA085](https://openairdocs.org/ntsb/ATL06LA085.md): Hughes 269A · Concord, NC · Accident · No injuries · Limited investigation · Final report · May 26, 2006 · N269RS · Substantial damage > The loss of engine power for undetermined reasons while maneuvering, resulting in a forced landing to uneven terrain and a roll over. - [NTSB SEA06LA096](https://openairdocs.org/ntsb/SEA06LA096.md): Schweizer 269C · Boise, ID · Accident · No injuries · Limited investigation · Final report · May 15, 2006 · N2096W · Substantial damage > The reduction of the throttle to idle at a high density altitude during a practice autorotation, which resulted in the engine stoppage. Factors contributing to the accident included the instructor pilot's improper planning by not adhering to the flight… - [NTSB CHI06CA131](https://openairdocs.org/ntsb/CHI06CA131.md): Schweizer 269C · Lees Summit, MO · Accident · No injuries · Data collection · Final report · May 12, 2006 · N7506L · Substantial damage > The flight instructor's delay in taking remedial action which led to the hard landing during the practice autorotation. The misjudged glide path, the dual student restricting the throttle control, and the trees were factors in the accident. - [NTSB NYC06LA106](https://openairdocs.org/ntsb/NYC06LA106.md): Schweizer 269C · Kings Park, NY · Accident · Minor injuries · Limited investigation · Final report · May 4, 2006 · N38DM · Substantial damage > Loss of engine power due to the failure of the number 3 connecting rod bearing. A contributing factor was the lack of suitable terrain for the emrgency landing. - [NTSB CHI06TA033](https://openairdocs.org/ntsb/CHI06TA033.md): Schweizer 269C · Manhattan, KS · Accident · No injuries · Final report · Nov 18, 2005 · N400PD · Substantial damage > The binding of the main rotor blade's tachometer cable during cruise flight resulting in an observed split tachometer indication/aural alarm and perceived mechanical emergency and the unsuitable terrain the pilot encountered during the emergency landing. A… - [NTSB MIA06CA013](https://openairdocs.org/ntsb/MIA06CA013.md): Schweizer 269C-1 · Titusville, FL · Accident · No injuries · Data collection · Final report · Oct 29, 2005 · N1567C · Substantial damage > The pilot-in-command's improper flare during a practice autorotative landing, which resulted in a hard landing. - [NTSB NYC06CA008](https://openairdocs.org/ntsb/NYC06CA008.md): Enstrom F-28C · Smoketown, PA · Accident · No injuries · Data collection · Final report · Oct 11, 2005 · N51772 · Substantial damage > The student pilot's failure to maintain aircraft control while performing pedal turns at a hover, resulting in a collision with terrain. - [NTSB SEA05CA149](https://openairdocs.org/ntsb/SEA05CA149.md): Hughes 269A · Laurel, MT · Accident · Minor injuries · Data collection · Final report · Jul 21, 2005 · N801CP · Substantial damage > the pilot's failure to maintain rotor rpm while executing a pinnacle approach, which resulted in a loss of control and collision with terrain. - [NTSB DFW05CA168](https://openairdocs.org/ntsb/DFW05CA168.md): Hughes 269C · Bruceville, TX · Accident · No injuries · Data collection · Final report · Jun 23, 2005 · N7487F · Substantial damage > The flight instructor's improper flare during autorotation, which resulted in a hard landing. Contributing factor was, the lack of suitable terrain. - [NTSB DEN05FA080](https://openairdocs.org/ntsb/DEN05FA080.md): Schweizer 269C · Pueblo, CO · Accident · Serious injuries · Field investigation · Final report · Jun 15, 2005 · N311CP · Destroyed > the flight instructor's failure to maintain control of the helicopter during the attempted autorotation after the loss of engine power for reasons undetermined. Contributing factors include the flight instructor's improper preflight planning, the high density… - [NTSB IAD05LA075](https://openairdocs.org/ntsb/IAD05LA075.md): Hughes TH-55 · Paintsville, KY · Accident · Minor injuries · Limited investigation · Final report · Jun 6, 2005 · N2KX · Destroyed > the pilot's inadvertent encounter with ground resonance which resulted in destruction of the helicopter. - [NTSB DEN05CA079](https://openairdocs.org/ntsb/DEN05CA079.md): Schweizer 269C · Pueblo, CO · Accident · No injuries · Data collection · Final report · May 19, 2005 · N958CP · Substantial damage > the student pilot's failure to maintain control of the helicopter during the landing. Contributing to the accident was the flight instructor's inadequate supervision of the student pilot. - [NTSB SEA05CA083](https://openairdocs.org/ntsb/SEA05CA083.md): Hughes 269A · Whitefish, MT · Accident · No injuries · Data collection · Final report · Apr 17, 2005 · N7054C · Substantial damage > The student pilot's failure to maintain control of the helicopter while hovering resulting in an in-flight collision with terrain. Gusting winds and the student pilot's inadequate compensation for the wind conditions were contributing factors. - [NTSB DEN05LA068](https://openairdocs.org/ntsb/DEN05LA068.md): Enstrom F-28C · Morrison, CO · Accident · No injuries · Limited investigation · Final report · Apr 13, 2005 · N5690K · Substantial damage > the pilot's failure to maintain rotor RPM during the approach which resulted in a landing short of the helipad. - [NTSB IAD05LA046](https://openairdocs.org/ntsb/IAD05LA046.md): Schweizer 269C · Leet, WV · Accident · Serious injuries · Limited investigation · Final report · Mar 19, 2005 · N61193 · Substantial damage > A fatigue fracture of the main transmission drive pinion. Also causal was the manufacturer's failure to remove the affected pinions from service during the period that transpired between the initial failures and the accident flight. - [NTSB LAX05LA050](https://openairdocs.org/ntsb/LAX05LA050.md): Schweizer 269C · Ontario, CA · Accident · No injuries · Limited investigation · Final report · Dec 11, 2004 · N130JS · Substantial damage > a loss of engine power due to the Designated Pilot Examiner's failure to follow the flight manual procedures and directives regarding throttle settings to be used for practice autorotations. - [NTSB LAX05LA039](https://openairdocs.org/ntsb/LAX05LA039.md): Schweizer 269C · Rialto, CA · Accident · No injuries · Limited investigation · Final report · Nov 22, 2004 · N45012 · Substantial damage > the pilot's failure to maintain adequate rotor rpm and altitude/clearance during the takeoff initial climb. - [NTSB MIA05CA006](https://openairdocs.org/ntsb/MIA05CA006.md): Schweizer 269C · Diamond Head, MS · Accident · No injuries · Data collection · Final report · Oct 16, 2004 · N119DM · Destroyed > The pilot's inadvertent loss of tail rotor effectiveness during takeoff to a hover and aborted landing in a grass area resulting in the grass catching fire from the engine exhaust and the helicopter being consumed by fire. - [NTSB NYC05CA008](https://openairdocs.org/ntsb/NYC05CA008.md): Hughes 269C · Minerva, OH · Accident · No injuries · Data collection · Final report · Oct 10, 2004 · N7423F · Substantial damage > The pilot's failure to maintain control of the helicopter during liftoff. - [NTSB FTW04LA212](https://openairdocs.org/ntsb/FTW04LA212.md): Enstrom F-28F · De Leon, TX · Accident · Minor injuries · Limited investigation · Final report · Aug 7, 2004 · N78616 · Substantial damage > The pilot's failure to properly secure a fuel line, which resulted in a loss of engine power due to leakage and subsequent fuel starvation. - [NTSB SEA04LA128](https://openairdocs.org/ntsb/SEA04LA128.md): Hughes 269C · Arlington, WA · Accident · No injuries · Limited investigation · Final report · Jul 10, 2004 · N56PH · Substantial damage > A significant power loss for undetermined reasons while in cruise flight, leading to a full autorotational landing. Factors include no suitable terrain in the area, and soft swampy terrain at the point where the pilot found it necessary to perform the forced… - [NTSB DEN04CA092](https://openairdocs.org/ntsb/DEN04CA092.md): Schweizer 269C · Englewood, CO · Accident · No injuries · Data collection · Final report · Jun 13, 2004 · N2062N · Substantial damage > the settling with power situation encountered by the pilot. Contributing to the accident was the high density altitude. - [NTSB IAD04LA013](https://openairdocs.org/ntsb/IAD04LA013.md): Schweizer 269C · Media, PA · Accident · No injuries · Limited investigation · Final report · Feb 28, 2004 · N75070 · Substantial damage > A lack of previous lubrication to the tail rotor drive shaft forward fitting teeth, which resulted in their gradual wear, the eventual slippage of the shaft, and the subsequent loss of tailrotor thrust and forced landing. - [NTSB NYC04LA051](https://openairdocs.org/ntsb/NYC04LA051.md): Schweizer 269C-1 · Byron, NY · Accident · Serious injuries · Limited investigation · Final report · Dec 27, 2003 · N358SS · Substantial damage > The pilot's improper use of the collective, and failure to maintain main rotor rpm, which resulted in low main rotor rpm and a hard landing. - [NTSB CHI04LA032](https://openairdocs.org/ntsb/CHI04LA032.md): Hughes TH-55A · West Lafayette, IN · Accident · Serious injuries · Limited investigation · Final report · Nov 18, 2003 · N9240D · Substantial damage > The fractured cluster fitting resulting in a loss of directional control during initial climb and the improper repair of cluster fitting by unknown personnel. The night conditions were a contributing factor. - [NTSB CHI04LA030](https://openairdocs.org/ntsb/CHI04LA030.md): Hughes 269B · Louisville, KY · Accident · Minor injuries · Limited investigation · Final report · Nov 10, 2003 · N1093D · Substantial damage > The pilot's improper in-flight decision to allow the passenger to manipulate the aircraft flight controls, his failure to maintain altitude/clearance from the river, and his inadequate remedial action. A related factor was the low altitude. - [NTSB CHI04IA018](https://openairdocs.org/ntsb/CHI04IA018.md): Enstrom F-28C · Lapeer, MI · Incident · No injuries · Incident investigation · Final report · Oct 22, 2003 · N77HX · Minor damage > Complete failure of the right anti-torque cable while on final approach for landing. A factor was the diminished tail rotor control resulting from the broken cable. - [NTSB CHI04LA015](https://openairdocs.org/ntsb/CHI04LA015.md): Schweizer 269C · Fenton, MI · Accident · 1 fatal · Limited investigation · Final report · Oct 18, 2003 · N456JP · Substantial damage > The intentional low altitude flight maneuvering and the ostentatious display by the pilot. The water was a factor to the accident. - [NTSB LAX03CA264](https://openairdocs.org/ntsb/LAX03CA264.md): Hughes 269C · Columbia, CA · Accident · No injuries · Data collection · Final report · Aug 25, 2003 · N58363 · Substantial damage > the student pilot's improper execution of the autorotation. Also causal, was the CFI's delayed remedial action and supervision of the flight. - [NTSB FTW03TA190](https://openairdocs.org/ntsb/FTW03TA190.md): Hughes 269A · Freer, TX · Accident · Minor injuries · Final report · Jul 30, 2003 · N81170 · Substantial damage > Loss of engine power for undetermined reasons. - [NTSB SEA03LA151](https://openairdocs.org/ntsb/SEA03LA151.md): Hughes 269C · Snohomish, WA · Accident · No injuries · Limited investigation · Final report · Jul 24, 2003 · N53KF · Substantial damage > The dual students failure to maintain clearance from the terrain during the go-around from a simulated autorotational flare, and the instructor pilot's failure to take adequate remedial action to keep the dual student from allowing the aircraft to impact the… - [NTSB CHI03LA217](https://openairdocs.org/ntsb/CHI03LA217.md): Enstrom F-28C · Waverly, IA · Accident · No injuries · Limited investigation · Final report · Jul 20, 2003 · N51699 · Substantial damage > The main rotor blade push-pull rods being corroded, sustaining fatigue, and separating in cruise and the main rotor blade contacting the tail boom during the emergency landing. Factors were the diminished aircraft control and the vibrations encountered during… - [NTSB DEN03LA115](https://openairdocs.org/ntsb/DEN03LA115.md): Schweizer 269C · Bountiful, UT · Accident · No injuries · Limited investigation · Final report · Jun 28, 2003 · N3623U · Substantial damage > the pilot not maintaining aircraft control during the aerial taxi. Factors contributing to the accident were the oscillating cyclic, the pilot's diverted attention, and the gusting crosswind. - [NTSB DEN03FA090](https://openairdocs.org/ntsb/DEN03FA090.md): Hughes 269C · Watkins, CO · Accident · 1 fatal · Field investigation · Final report · May 28, 2003 · N9643F · Destroyed > failure of both pilots to initiate a timely recovery from a practice autorotation. A contributing factor was the instructor's inadequate supervision of the pilot receiving instruction. - [NTSB NYC03LA106](https://openairdocs.org/ntsb/NYC03LA106.md): Schweizer 269C · New Canaan, CT · Accident · Minor injuries · Limited investigation · Final report · May 15, 2003 · N109JS · Substantial damage > The inadequate annual inspection performed by maintenance facility personnel, which resulted in a failure of a fuel system bellcrank. Factors were the subsequent inadequate inspections by other maintenance personnel and the pilot. - [NTSB LAX03FA134](https://openairdocs.org/ntsb/LAX03FA134.md): Hughes 269B · Auburn, CA · Accident · 2 fatal · Field investigation · Final report · Apr 11, 2003 · N16133 · Destroyed > the misjudged flare maneuver by an unknown crewmember during a likely practice autorotation that resulted in an in-flight collision with terrain. - [NTSB FTW03LA122](https://openairdocs.org/ntsb/FTW03LA122.md): Enstrom F-28F · Monroe, LA · Accident · No injuries · Limited investigation · Final report · Apr 5, 2003 · N86238 · Substantial damage > The pilot's failure to maintain control of the helicopter. A contributing factor was the crosswind. - [NTSB LAX03FA060](https://openairdocs.org/ntsb/LAX03FA060.md): Schweizer 269C · Collinsville, CA · Accident · 1 fatal · Field investigation · Final report · Jan 4, 2003 · N98TH · Destroyed > A loss of engine power for undetermined reasons, and the pilot's failure to maintain main rotor rpm during the subsequent autorotation. A factor in the accident was the unsuitable nature of the terrain for a forced landing. - [NTSB LAX03LA052](https://openairdocs.org/ntsb/LAX03LA052.md): Schweizer 269C · Los Banos, CA · Accident · No injuries · Limited investigation · Final report · Dec 18, 2002 · N642KC · Substantial damage > The improper engine overhaul by other maintenance personnel, which resulted in an exhaust valve failure and a total loss of engine power while in maneuvering flight. - [NTSB DEN03LA018](https://openairdocs.org/ntsb/DEN03LA018.md): Enstrom F-28C · Morrison, CO · Accident · Minor injuries · Limited investigation · Final report · Nov 23, 2002 · N552CS · Substantial damage > the pilot not maintaining clearance from the telephone lines during landing. Factors contributing to the accident were the pilot not being able to see the telephone lines, the low altitude, and the dark night. - [NTSB CHI02LA293](https://openairdocs.org/ntsb/CHI02LA293.md): Hughes 269A · Council Bluffs, IA · Accident · No injuries · Limited investigation · Final report · Sep 24, 2002 · N1040S · Substantial damage > The premature fracture of the cyclic/mixture bracket resulting in the inability to conduct a landing flare. - [NTSB DEN02LA098](https://openairdocs.org/ntsb/DEN02LA098.md): Schweizer 269C · Broomfield, CO · Accident · No injuries · Limited investigation · Final report · Aug 20, 2002 · N7508L · Substantial damage > maintenance personnel's failure to secure the landing skid oleo strut bolt during the last 50-hour inspection, causing the left rear skid to collapse and the tail rotor to strike the ground. - [NTSB ATL02LA159](https://openairdocs.org/ntsb/ATL02LA159.md): Schweizer 300C · Haleyville, AL · Accident · Serious injuries · Limited investigation · Final report · Aug 17, 2002 · N269FW · Substantial damage > The failure of maintenance personnel to perform an adequate inspection of loose intake components, which resulted in a total loss of engine power and subsequent emergency descent, forced landing, and collision with terrain in dark night conditions. - [NTSB SEA02LA150](https://openairdocs.org/ntsb/SEA02LA150.md): Hughes 269A · Covington, WA · Accident · No injuries · Limited investigation · Final report · Aug 10, 2002 · N90271 · Substantial damage > Aircraft control not maintained while hovering. - [NTSB ATL02LA141](https://openairdocs.org/ntsb/ATL02LA141.md): Hughes HU-269-A · Hamilton, AL · Accident · No injuries · Limited investigation · Final report · Jul 12, 2002 · N911LH · Substantial damage > The pilot's improper use of flight controls that resulted in an improper flare and a hard landing during a practice autorotation. A factor was the loss of rotor rpm. Next page: https://openairdocs.org/ntsb.md?engine=41524&page=4 ## 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 ('41524')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=41524&page=3 --- 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.