# NTSB investigations: Hughes Helicopters HUGHES 369D, AK 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 ANC13LA074](https://openairdocs.org/ntsb/ANC13LA074.md): Hughes 500D · Delta Junction, AK · Accident · No injuries · Class 3 · Limited · Final report · Aug 6, 2013 · N134SH · Substantial damage > A total loss of engine power for undetermined reasons, which necessitated an emergency hovering autorotation, during which the helicopter impacted trees and terrain. - [NTSB ANC11IA059](https://openairdocs.org/ntsb/ANC11IA059.md): Hughes 500D · McGrath, AK · Incident · No injuries · Incident investigation · Final report · Jul 5, 2011 · N315SH · Minor damage > A fatigue fracture of the governor-to-fuel control Pc line, which resulted in a partial loss of engine power. - [NTSB ANC07LA022](https://openairdocs.org/ntsb/ANC07LA022.md): Hughes 369D · Gustavus, AK · Accident · No injuries · Limited investigation · Final report · Mar 3, 2007 · N5134V · Substantial damage > The inadequate clearance from a tranquilized moose while hovering in ground effect, and the operator's inadequate procedures for such operations, which resulted in an in-flight collision with the moose. Factors associated with the accident were the moose, a… - [NTSB ANC03LA082](https://openairdocs.org/ntsb/ANC03LA082.md): Hughes 369D · Ketchikan, AK · Accident · Minor injuries · Limited investigation · Final report · Jul 21, 2003 · N1091S · Substantial damage > The improper installation of a bolt in the gas generator governor linkage by company maintenance personnel, which resulted in a loss of the bolt, a loss of engine power while maneuvering, and subsequent forced landing and collision with trees. Factors… - [NTSB ANC98TA162](https://openairdocs.org/ntsb/ANC98TA162.md): Hughes 369D · Homer, AK · Accident · Serious injuries · Final report · Sep 27, 1998 · N1091P · Minor damage > The passenger not following the instructions given by the pilot. Contributing factors were the rising terrain and the pilot's diverted attention during the toe in landing. - [NTSB ANC96LA111](https://openairdocs.org/ntsb/ANC96LA111.md): McDonnell Douglas MD369D · Healy, AK · Accident · Minor injuries · Limited investigation · Final report · Aug 4, 1996 · N58269 · 2 aircraft · No damage > The inadequate visual outlook by the pilots of both aircraft, and their failure to see and avoid the other aircraft. A factor associated with the accident was sunglare affecting the helicopter pilot's vision. - [NTSB ANC96TA092](https://openairdocs.org/ntsb/ANC96TA092.md): Hughes 369D · Ketchikan, AK · Accident · No injuries · Final report · Jun 26, 1996 · N5125Q · Substantial damage > The pilot's failure to maintain control of the helicopter. The pilot's selection of unsuitable terrain for landing was a factor in the accident. - [NTSB ANC96LA045](https://openairdocs.org/ntsb/ANC96LA045.md): McDonnell Douglas H-369 · Delta Junction, AK · Accident · Minor injuries · Limited investigation · Final report · Apr 6, 1996 · N58268 · Substantial damage > loss of engine power for an undetermined reason. - [NTSB ANC95LA107](https://openairdocs.org/ntsb/ANC95LA107.md): Hughes 500D · Paxson, AK · Accident · No injuries · Limited investigation · Final report · Jul 18, 1995 · N8639F · Substantial damage > Fuel starvation due to acrylamide contamination in the fuel control inlet filter. The lack of suitable terrain for a forced landing was a related factor. - [NTSB ANC93LA125](https://openairdocs.org/ntsb/ANC93LA125.md): Hughes 369D · Cordova, AK · Accident · No injuries · Limited investigation · Final report · Jul 24, 1993 · N3115Y · Substantial damage > A loss of engine power for undetermined reasons. A factor was the rough/uneven terrain. - [NTSB ANC92LA178](https://openairdocs.org/ntsb/ANC92LA178.md): Hughes 369D · George Inlet, AK · Accident · Minor injuries · Limited investigation · Final report · Sep 25, 1992 · N58315 · Substantial damage > The pilot's improper in flight planning and decision and his failure to maintain altitude during the turn to reverse direction. Contributing to the accident was the calm water. - [NTSB ANC92FA164](https://openairdocs.org/ntsb/ANC92FA164.md): Mcdonnell Douglas 369D · Eagle, AK · Accident · 3 fatal · Field investigation · Final report · Sep 11, 1992 · N1096X · Destroyed > An inflight fatigue failure and separation of a main rotor blade, inadequate operator maintenance and inspection, and material defect. - [NTSB ANC92FA159](https://openairdocs.org/ntsb/ANC92FA159.md): Hughes 369D · Nunavaugaluk Lk, AK · Accident · Serious injuries · Field investigation · Final report · Sep 9, 1992 · N8697F · Substantial damage > The separation of the tail rotor abrasion strip and the subsequent total loss of the tail rotor. Factors contributing to the accident were: insufficient manufacturer's maintenance design changes, inadequate aircraft equipment design by the manufacturer and… - [NTSB ANC92LA090](https://openairdocs.org/ntsb/ANC92LA090.md): McDonnell Douglas MD-500D · Polk Inlet, AK · Accident · No injuries · Limited investigation · Final report · Jun 10, 1992 · N8395F · Substantial damage > The pilot's failure to follow proper procedure and the company's inadequate procedures and directives. A factor was the uneven terrain. - [NTSB ANC91LA146](https://openairdocs.org/ntsb/ANC91LA146.md): Hughes 369D · Iliamna, AK · Accident · No injuries · Limited investigation · Final report · Sep 11, 1991 · N29JV · Substantial damage > Was fuel exhaustion due to the pilot-in-command's improper preflight planning. Contributing to the accident was the rough and uneven tundra landing site. - [NTSB ANC91FA001](https://openairdocs.org/ntsb/ANC91FA001.md): Hughes 500D · Kennsington, AK · Accident · Serious injuries · Field investigation · Final report · Oct 4, 1990 · N1107G · Substantial damage > The loss of control during takeoff due to dynamic rollover. Contributing to the accident was the pilot-in-command's selection of an uneven landing area. - [NTSB SEA89LA170](https://openairdocs.org/ntsb/SEA89LA170.md): Hughes 369D · Petersburg, AK · Accident · No injuries · Limited investigation · Final report · Sep 9, 1989 · N1088N · Substantial damage > The pilot failed to obtain clearance over trees. Contributing to the accident was: the aircraft being above its maximum certificated gross weight limitation and the trees. - [NTSB ANC88LA086](https://openairdocs.org/ntsb/ANC88LA086.md): Hughes 369D · Kitoi Bay, AK · Accident · No injuries · Limited investigation · Final report · Jul 9, 1988 · N1089D · Substantial damage > The helicopter landed with the left skid against a survey stake which protruded from the ground about 6 inches. Upon liftoff the skid did not clear the metal stake before the helicopter started moving laterally to the left. The left skid remained against the… - [NTSB SEA87FA162](https://openairdocs.org/ntsb/SEA87FA162.md): Hughes 369D · Ketchikan, AK · Accident · 2 fatal · Field investigation · Final report · Aug 12, 1987 · N58318 · 2 aircraft · Destroyed > N58318 (Hughes 369, under contract with us geological survey) was inbnd fm se to lnd at Ketchikan-temsco heliport (6Z4) as N73WS (Cessna 185 amphibian) was depg se fm Ketchikan intl arpt (ktn). Ktn & 6Z4 were located in tongass narrows withmtns NE & sw. Rprtd… - [NTSB SEA84LA134](https://openairdocs.org/ntsb/SEA84LA134.md): Hughes 369D · Wrangell, AK · Accident · No injuries · Limited investigation · Final report · Jun 16, 1984 · N5133U · Substantial damage > The helicopter was parked with the eng running when it was struck by another acft, a Beech C-45G. Prior to the collision, the helicopter was at a low RPM; therefore, the plt was unable to move the helicopter out of the way. The Beech acft was being taxied… - [NTSB ANC83LA138](https://openairdocs.org/ntsb/ANC83LA138.md): Hughes 369D · Mcgrath, AK · Accident · No injuries · Limited investigation · Final report · Aug 5, 1983 · N1106Z · Substantial damage > The plt stated that he was flying straight & level at aprx 700 ft AGL, when the eng-out light illuminated. He began an autorotation to a ridgeline. During the landing, the main rotor blades contacted the tail boom & severed it from the main fuselage. An… - [NTSB ANC83LA076](https://openairdocs.org/ntsb/ANC83LA076.md): Hughes 500D · Cantwell, AK · Accident · No injuries · Limited investigation · Final report · Apr 29, 1983 · N58229 · Substantial damage > The helicopter skid contacted the ground during a hovering turn for landing and rolled the helicopter over on its right side. The pilot had made an approach for landing to a 10 foot hover and then lost sight of his reference point in fresh snow picked up by… - [NTSB SEA82FA070](https://openairdocs.org/ntsb/SEA82FA070.md): Hughes 369D · 6nm Sse Wrangel, AK · Accident · Minor injuries · Field investigation · Final report · May 13, 1982 · N1107T · Substantial damage > The pilot reported that the aircraft was on a reconnaissance flight to survey a proposed powerline project. He reported that during the flight, the engine flamed out and an autorotation was initiated. He maneuvered the helicopter to land in a clearance, but… - [NTSB ANC81FA100](https://openairdocs.org/ntsb/ANC81FA100.md): Hughes 369D · Lk Minchumina, AK · Accident · Minor injuries · Closed · Aug 27, 1981 · N8363F · Destroyed - [NTSB ANC81DAD05](https://openairdocs.org/ntsb/ANC81DAD05.md): Hughes 369D · Swan Lake, AK · Accident · No injuries · Closed · Aug 15, 1981 · N8348F · Destroyed - [NTSB ANC81FA082](https://openairdocs.org/ntsb/ANC81FA082.md): Hughes 369D · Umiat, AK · Accident · Minor injuries · Closed · Jul 21, 1981 · N8366F · Substantial damage - [NTSB ANC81FA064](https://openairdocs.org/ntsb/ANC81FA064.md): Hughes 369D · Tanacross, AK · Accident · Minor injuries · Closed · Jun 19, 1981 · N11035 · Substantial damage - [NTSB ANC81FA055](https://openairdocs.org/ntsb/ANC81FA055.md): Hughes 369D · Glennallen, AK · Accident · Minor injuries · Closed · May 25, 1981 · N211EH · Substantial damage - [NTSB ANC80DA068](https://openairdocs.org/ntsb/ANC80DA068.md): Hughes 369B · Chokosna, AK · Accident · No injuries · Closed · Jul 12, 1980 · N8363F · 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" = 'AK' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('4470706')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?model=4470706&state=AK --- 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.