NTSB investigations: Lycoming 0-540 series, AK
115 cases on aircraft whose registry engine model is Lycoming 0-540 series. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 1964 | 2 |
|---|---|
| 1965 | 4 |
| 1971 | 2 |
| 1972 | 3 |
| 1973 | 1 |
| 1974 | 2 |
| 1975 | 4 |
| 1976 | 1 |
| 1977 | 2 |
| 1978 | 4 |
| 1979 | 2 |
| 1980 | 1 |
| 1981 | 9 |
| 1982 | 2 |
| 1984 | 7 |
| 1985 | 2 |
| 1986 | 2 |
| 1987 | 1 |
| 1988 | 5 |
| 1989 | 3 |
| 1993 | 1 |
| 1994 | 2 |
| 1995 | 3 |
| 1996 | 1 |
| 1997 | 1 |
| 1998 | 1 |
| 1999 | 1 |
| 2000 | 3 |
| 2001 | 4 |
| 2002 | 7 |
| 2003 | 1 |
| 2004 | 2 |
| 2006 | 4 |
| 2007 | 4 |
| 2009 | 3 |
| 2010 | 1 |
| 2013 | 1 |
| 2014 | 2 |
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 2 |
| 2019 | 3 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 2 |
| 2025 | 1 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "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.engine_model_code IN ('41532'))
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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.engine_model_code IN ('41532'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB ANC25LA105Accident · Serious injuriesClass 3 · LimitedPreliminary reportMaule M-5-235C · Point MacKenzie, AKOn September 13, 2025, about 12:28 Alaska daylight time, a Maule M5-235C airplane, N343GA, was substantially damaged when it was involved in an accident near Point McKenzie, Alaska. The commercial pilot sustained serious injuries. The airplane was operated…NTSB ANC23LA033Accident · No injuriesClass 4 · LimitedFinal reportMaule M-7-235 · Soldotna, AKThe pilot’s failure to maintain directional control during the landing roll in gusting crosswind conditions.NTSB ANC23LA021Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-32-260 · Tok, AKThe pilot's failure to maintain a proper approach glide path, which resulted in a hard landing, short of his anticipated touchdown point.NTSB ANC23LA002Accident · 1 fatalClass 3 · LimitedFinal reportPiper PA-32-260 · Cordova, AKThe pilot’s improper decision to continue visual flight rules flight into instrument meteorological conditions, which resulted in controlled flight into terrain.NTSB ANC22FA005Accident · 1 fatalClass 3 · FieldFinal reportGerald Jones 2+2 · Kodiak, AKThe pilot's failure to maintain adequate airspeed while maneuvering, which resulted in an exceedance of the airplane’s critical angle of attack and an aerodynamic stall.NTSB GAA19CA507Accident · No injuriesData collectionFinal reportMaule M5 · Anchorage, AKThe pilot's excessive braking during landing on a dry lakebed, which resulted in a nose-over.NTSB GAA19CA387Accident · No injuriesData collectionFinal reportPiper PA32 · Seldovia, AKThe pilot's failure to attain a sufficient climb following a short-field takeoff, which resulted in collision with trees.NTSB ANC19FA026Accident · 3 fatalField investigationFinal reportHelio H 250 · Seward, AKThe pilot's failure to maintain clearance from trees during takeoff, which resulted in an in-flight collision, a loss of control, and impact with terrain.NTSB GAA18CA006Accident · No injuriesData collectionFinal reportMaule M 7 · Manokatak, AKThe pilot’s failure to maintain directional control during takeoff in gusting wind conditions.NTSB ANC17TA015Accident · Serious injuriesFinal reportPiper PA-32 · Pilot Point, AKThe pilot's continued flight into known icing conditions, which resulted in structural icing and a forced landing on icy, snow-covered terrain.NTSB ANC16LA072Accident · No injuriesLimited investigationFinal reportHelio H-250 · Anchorage, AKThe fatigue fracture failure of both main landing gear (MLG) legs during the landing roll, which resulted in the collapse and separation of both MLG legs.NTSB GAA16CA142Accident · No injuriesData collectionFinal reportMaule M5 · Wasilla, AKThe student pilot's failure to maintain directional control during the landing, which resulted in a runway excursion, and an impact with terrain.NTSB ANC15LA073Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 · Fort Glenn, AKThe separation of the tail rotor gearbox from the tailboom attachment point due to overstress loads imposed by a tail rotor blade imbalance as the result of impact with an undetermined object during low-level flight operations.NTSB ANC15CA038Accident · No injuriesData collectionFinal reportMaule M 7-235B · Talkeetna, AKThe pilot's loss of directional control during landing, resulting in a collision with terrain.NTSB ANC14CA081Accident · No injuriesData collectionFinal reportMaule M 5-235C · Talkeetna, AKThe pilot's excessive taxi speed, which resulted in a loss of control.NTSB ANC14CA060Accident · No injuriesData collectionFinal reportPiper PA 32-260 · Anderson, AKThe pilot's inadequate compensation for wind conditions, which resulted in a hard landing.NTSB ANC13FAMS2Accident · 1 fatalMissing aircraftFinal reportPiper PA-32-260 · Yakutat, AKUndetermined because the pilot and airplane were not found.NTSB ANC10LA071Accident · Minor injuriesLimited investigationFinal reportPiper PA-32-260 · Chickaloon, AKThe pilot's continued visual flight into instrument meteorological conditions, resulting in an in-flight collision with terrain.NTSB ANC09CA056Accident · No injuriesData collectionFinal reportMaule M-5-235C · Wasilla, AKThe pilot's selection of an unsuitable takeoff area with an unfavorable wind.NTSB ANC09LA042Accident · No injuriesLimited investigationFinal reportPiper PA-24-250 · Wasilla, AKA loss of engine power due to the blockage of the carburetor air inlet by a piece of engine baffling. Contributing to the accident was a worn engine baffle, and the pilot/owner's failure to have the engine baffle replaced.NTSB ANC09GA040Accident · No injuriesFinal reportRobinson Helicopter R44 · Iliamna, AKThe main rotor transmission mount design, which resulted in an in-flight vibration/oscillation, and damage to the helicopter during an emergency descent and hard landing. Contributing to the accident was the lack of information from the manufacturer regarding…NTSB ANC07CA105Accident · No injuriesData collectionFinal reportPiper PA-32 · Chenega Bay, AKThe pilot's selection of unsuitable terrain for landing, which resulted in a collision with a ditch during the landing roll. A factor associated with the accident was the ditch.NTSB ANC07CA087Accident · No injuriesData collectionFinal reportMaule M7 · Bettles, AKThe pilot's selection of an unsuitable landing site, which resulted in an encounter with soft terrain, and a nose over during the landing roll.NTSB ANC07LA057Accident · No injuriesLimited investigationFinal reportCessna 182RG · Tok, AKThe pilot's failure to maintain control of the airplane during takeoff initial climb.NTSB ANC07CA049Accident · No injuriesData collectionFinal reportBritten-Norman BN2A26 · Egegik, AKThe pilot's selection of unsuitable terrain for landing, which resulted in structural damage during the landing roll when the airplane encountered soft sand.NTSB ANC07LA001Accident · Serious injuriesLimited investigationFinal reportPiper PA-32-260 · Port Alsworth, AKThe pilot's inadequate compensation for wind conditions, which resulted in a loss of control while maneuvering, and an in-flight collision with tree covered terrain. Factors associated with the accident are the pilot's inadequate evaluation of weather…NTSB ANC06FA089Accident · 1 fatalField investigationFinal reportPiper PA-28 · Manley Hot Spng, AKThe pilot's continued cruise flight into known adverse weather conditions, his failure to maintain aircraft control while maneuvering, and his exceeding the design stress limits of the airplane, which resulted in an in-flight break-up. Factors associated with…NTSB ANC06LA064Accident · No injuriesLimited investigationFinal reportRobinson R44 · Skwentna, AKThe pilot's improper rigging of the external sling load, which allowed the suspended load/cargo cable to entangle and disable the tail rotor control, resulting in a loss of control during cruise and an in-flight collision with terrain.NTSB ANC06LA072Accident · No injuriesLimited investigationFinal reportHelio H-250 · Anchorage, AKThe pilot's improper use of the carburetor heat control during takeoff, which resulted in a partial loss of engine power, a hard landing, and an on ground encounter with terrain. A factor contributing to the accident was an inadvertent ground loop.NTSB ANC04LA113Accident · Serious injuriesLimited investigationFinal reportBritten-Norman BN-2A · Kodiak, AKThe pilot's inadequate compensation for wind conditions, and his intentional flight into adverse weather conditions, which resulted in a loss of control and collision with terrain during takeoff-initial climb. Factors contributing to the accident were high…NTSB ANC04FA092Accident · 2 fatalField investigationFinal reportMaule M-5-235C · Seward, AKThe failure of an aviation mechanic/inspector to adequately inspect the pilot/owner's work during the engine overhaul, which resulted in a loss of engine oil and engine power during cruise flight, and a subsequent ditching. Factors associated with the…NTSB ANC04LA014Accident · No injuriesLimited investigationFinal reportPiper PA-32-260 · Larson Bay, AKThe loss of engine power for an unknown reason while maneuvering, which resulted in the pilot ditching the airplane. Factors contributing to the accident were a low ceiling and a snow squall.NTSB ANC02FA108Accident · 2 fatalField investigationFinal reportRobinson R-44 · Ketchikan, AKThe pilot's failure to maintain control of the helicopter in-flight due to spatial disorientation, which resulted in an uncontrolled descent and impact with the surface of a lake. Factors contributing to the accident were the high terrain surrounding the…NTSB ANC02LA099Accident · No injuriesLimited investigationFinal reportMaule M-7-235 · Palmer, AKThe fracture of the right main landing gear axle during landing roll. Factors associated with the accident were corrosion of the landing gear axle, failure of company maintenance personnel to adequately inspect the axle and detect the corrosion, and rough and…NTSB ANC02LA095Accident · Minor injuriesLimited investigationFinal reportPiper PA-32-260 · Red Devil, AKA partial loss of engine power for an undetermined reason during the initial climb after takeoff that resulted in a collision with trees. A contributing factor in the accident was rising terrain which was unsuitable for a forced landing.NTSB ANC02LA061Accident · No injuriesLimited investigationFinal reportRobinson R-44 · Shageluk, AKThe pilot's failure to maintain a proper glide path. A factor associated with the accident was the pilot's diverted attention.NTSB ANC02LA043Accident · No injuriesLimited investigationFinal reportRobinson R-44 · Galena, AKThe pilot's selection of unsuitable terrain for landing which precipitated a grass fire. Factors contributing to the accident were the manufacturer's inadequate design of the helicopter's exhaust system, placing it low to the ground, and terrain conditions…NTSB ANC02FA025Accident · 1 fatalField investigationFinal reportPiper PA-28-235 · Manokotak, AKThe pilot's continued VFR flight into instrument meteorological conditions, and subsequent collision with terrain during cruise flight. Factors in the accident were low ceilings, snow, and mountainous snow-covered terrain.NTSB ANC02LA012Accident · No injuriesLimited investigationFinal reportBritten-Norman BN2A-26 · Ouzinkie, AKThe pilot's selection of unsuitable terrain for takeoff. Factors associated with the accident are a slush covered runway, and rough/uneven terrain.NTSB ANC02LA004Accident · Serious injuriesLimited investigationFinal reportPiper PA-32-260 · Port Heiden, AKThe pilot's delay in aborting the landing. Factors in the accident were snow and ice on the runway surface, and the pilot's excessive taxi speed.NTSB ANC01LA131Accident · No injuriesLimited investigationFinal reportMaule M-7-235B · Koliganek, AKThe pilot's delay in aborting the takeoff. A factor in the accident was the pilot's diverted attention during the takeoff.NTSB ANC01FA084Accident · 4 fatalField investigationFinal reportMaule M-5-235C · Bettles, AKThe pilot's inadvertent stall of the airplane during an unknown phase of flight.NTSB ANC01TA035Accident · No injuriesFinal reportRobinson R-44 · Chickaloon, AKThe pilot's collision with terrain due to his inadequate planning of the approach, and his failure to maintain the helicopter's main rotor RPM during a go-around. Factors in the accident were a tailwind, flat lighting conditions, and snow-covered terrain.NTSB ANC01LA024Accident · No injuriesLimited investigationFinal reportMaule M-5 · King Salmon, AKThe loss of engine power during the landing approach due to the pilot's inadequate preflight of the airplane and contamination (water) in the carburetor.NTSB ANC01LA016Accident · No injuriesLimited investigationFinal reportPiper PA-32-260 · Lime Village, AKThe pilot's failure to properly utilize carburetor heat. Factors in the accident were the presence of carburetor icing conditions, and unsuitable terrain for a forced landing.NTSB ANC00LA090Accident · No injuriesLimited investigationFinal reportMaule ML-5 · Wasilla, AKThe pilot's improper use of the fuel tank selector, resulting in fuel starvation.NTSB ANC99LA041Accident · No injuriesLimited investigationFinal reportMaule M-5 · Talkeetna, AKThe pilot's inadequate compensation for the crosswind during landing. Factors associated with this accident were the left crosswind, and the snowbank on the edge of the runway.NTSB ANC99LA006Accident · No injuriesLimited investigationFinal reportBritten-Norman BN-2A · English Bay, AKThe pilot-in-command's inadequate compensation for the crosswind conditions, and failure to maintain adequate clearance from the parked airplane. Factors associated with this accident were the gusty crosswinds, and the congested takeoff area due to no parking…NTSB ANC97LA023Accident · No injuriesLimited investigationFinal reportMaule M-5 · Chugiak, AKThe pilot's failure to attain the proper touchdown point during landing. The snow-covered runway was a factor.NTSB ANC96LA130Accident · No injuriesLimited investigationFinal reportMaule M-7 · Palmer, AKThe pilot's selection of an unsuitable landing area.