NTSB investigations: Continental TSIO-520 series, AK
46 cases on aircraft whose registry engine model is Continental TSIO-520 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
| 1975 | 1 |
|---|---|
| 1978 | 1 |
| 1979 | 2 |
| 1981 | 1 |
| 1982 | 1 |
| 1983 | 1 |
| 1984 | 3 |
| 1986 | 1 |
| 1987 | 3 |
| 1988 | 1 |
| 1990 | 1 |
| 1993 | 1 |
| 1994 | 1 |
| 1995 | 4 |
| 1996 | 1 |
| 1997 | 2 |
| 1998 | 3 |
| 2000 | 2 |
| 2001 | 1 |
| 2002 | 1 |
| 2003 | 3 |
| 2004 | 1 |
| 2005 | 1 |
| 2006 | 1 |
| 2007 | 1 |
| 2008 | 2 |
| 2010 | 1 |
| 2012 | 1 |
| 2016 | 1 |
| 2023 | 1 |
| 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 ('17040'))
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 ('17040'))
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 ANC25FA035Accident · 2 fatalClass 3 · FieldPreliminary reportCessna T207 · Nanwalek, AKOn April 28, 2025, about 1355 Alaska daylight time, a Cessna T207 airplane, N91025, was substantially damaged when it was involved in an accident near Nanwalek, Alaska. The pilot and one passenger were fatally injured. One passenger was seriously injured. The…NTSB ANC23LA065Accident · 2 fatalClass 3 · LimitedFinal reportBeech B36TC · Cape Yakataga, AKThe pilot’s continued flight into moderate to severe icing conditions, including supercooled large droplets, over mountainous terrain, which resulted in a loss of control and impact with terrain. Contributing to the accident was the National Weather Service…NTSB GAA16CA445Accident · No injuriesData collectionFinal reportCessna T207 · Nanwalek, AKThe pilot’s unstabilized approach and a subsequent runway overrun while landing on a short runway in variable wind conditions.NTSB ANC12CA040Accident · No injuriesData collectionFinal reportCessna T210L · Whittier, AKThe pilot’s failure use the prelanding checklist and to extend the landing gear before landing.NTSB ANC10CA093Accident · Minor injuriesData collectionFinal reportCessna T310R · Nome, AKThe pilot's failure to maintain clearance from terrain during a special VFR approach, resulting in a collision with terrain.NTSB ANC08CA120Accident · No injuriesData collectionFinal reportCessna T207 · Nyac, AKThe pilot's selection of unsuitable terrain for landing, which resulted in the nose wheel separating from the airplane during the landing roll.NTSB ANC08LA095Accident · Minor injuriesLimited investigationFinal reportCessna T210 · Ketchikan, AKThe pilot's failure to ensure that there was sufficient fuel on board the airplane for the planned flight, and his inadequate flight planning and navigation, which resulted in fuel exhaustion and ditching short of the planned destination. Contributing to the…NTSB ANC07LA021Accident · No injuriesLimited investigationFinal reportCessna 402C · Cordova, AKThe failure of the right main landing gear linkage during the landing roll, which resulted in a loss of directional control and the collapse of the right main landing gear. A factor associated with the accident was the failure of company maintenance personnel…NTSB ANC06LA144Accident · No injuriesLimited investigationFinal reportCessna TU206A · Juneau, AKThe separation of the number 6 cylinder assembly from the engine during cruise flight, which resulted in a hard forced landing in rough ocean swells. A factor contributing to the accident was the rough ocean swells.NTSB ANC05FA090Accident · 3 fatalField investigationFinal reportCessna T207 · Nanwalek, AKThe pilot's continued VFR flight into instrument meteorological conditions, which resulted in an in-flight collision with an island cliff during cruise flight. A factor contributing to the accident was fog in the area of the accident.NTSB ANC04CA085Accident · No injuriesData collectionFinal reportCessna 402C · Huslia, AKThe pilot's failure to extend the landing gear, which resulted in an inadvertent wheels up landing. A factor associated with the accident was the pilot's diverted attention.NTSB ANC04LA011Accident · No injuriesLimited investigationFinal reportCessna 402 · Galena, AKWater contamination and freezing of the landing gear actuator that prevented the extension of the right main landing gear, resulting in a gear-up landing. Factors contributing to the accident were freezing temperatures at the accident location, and inadequate…NTSB ANC03LA076Accident · 4 fatalLimited investigationFinal reportCessna 401 · Gustavus, AKThe pilot's inadequate in-flight decision making process, and failure to refuel the airplane prior to fuel exhaustion, which resulted in a total loss of engine power. A factor associated with the accident was the lack of a suitable forced landing site.NTSB ANC03LA065Accident · No injuriesLimited investigationFinal reportCessna 402B · Telida, AKThe pilot's selection of an unsuitable landing site, which resulted in the collapse of the nose landing gear. A factor in the accident was a soft runway.NTSB ANC02LA128Accident · No injuriesLimited investigationFinal reportCessna 207 · Circle, AKThe pilot's inadequate wind evaluation during takeoff resulting in a downwind takeoff and subsequent overrun during an aborted takeoff. Factors in the accident were a tailwind and the pilot's failure to verify the selected flap setting.NTSB ANC01LA103Accident · No injuriesLimited investigationFinal reportCessna 207 · Pilot Point, AKThe pilot's selection of an unsuitable takeoff area, and failure to maintain clearance. A factor associated with the accident was a vehicle mounted gantry.NTSB ANC00LA103Accident · No injuriesLimited investigationFinal reportCessna 185 · Kaktovik, AKThe pilot's selection of an unsuitable takeoff area on the airstrip. Factors associated with this accident were the rough takeoff area, and the pilot's loss of directional control.NTSB ANC00LA061Accident · No injuriesLimited investigationFinal reportCessna 402C · Cordova, AKAn in-flight collision with a bird.NTSB ANC98FA168Accident · 1 fatalField investigationFinal reportCessna TU-206G · Ketchikan, AKThe pilot's continued VFR flight into instrument meteorological conditions. Contributing factors were low ceilings and mountainous/hilly terrain.NTSB ANC98LA149Accident · No injuriesLimited investigationFinal reportCessna 207 · Sleetmute, AKThe pilot's selection of unsuitable terrain for departure. A factor in the accident was a narrow runway.NTSB ANC98LA034Accident · No injuriesLimited investigationFinal reportCessna 185F · Coldfoot, AKThe pilot's selection of unsuitable terrain for takeoff. Soft, snow covered terrain was a factor in the accident.NTSB ANC97LA150Accident · No injuriesLimited investigationFinal reportCessna 402C · Kivalina, AKAn overstress fracture of the nose landing gear attachment. A factor associated with the accident was the rough landing area.NTSB ANC97LA145Accident · No injuriesLimited investigationFinal reportCessna 402C · Buckland, AKThe failure of the pilot of the Cessna 402C, N2649Z, to maintain adequate clearance while taxiing alongside the stationary Cessna 208B, N1123R.NTSB ANC96LA093Accident · No injuriesLimited investigationFinal reportCessna 206 · Anchorage, AKThe pilot of the Cessna 180, N5020E, disregard of an air traffic control clearance/instruction to hold short. A factor in the accident was the failure of both pilots to maintain an adequate visual lookout for other aircraft.NTSB ANC95LA159Accident · No injuriesLimited investigationFinal reportCessna 206 · Homer, AKThe pilot's inadequate compensation for the wind conditions, which resulted in his failure to reach the proper touchdown point for landing. Factors related to the accident were: the variable wind condition, and rising terrain (no overrun) at the approach end…NTSB ANC95LA094Accident · No injuriesLimited investigationFinal reportBeech 36 · Chitina, AKAn inadvertent stall while on approach. The pilot-in-command's inadequate remedial action was a factor.NTSB ANC95LA077Accident · No injuriesLimited investigationFinal reportCessna 402B · Tuntutuliak, AKThe airport maintenance personnel's inadequate maintenance of the runway by not replacing the yellow cones that marked the soft area. The soft area on the runway was a related factor.NTSB ANC95LA040Accident · No injuriesLimited investigationFinal reportCessna 206G · Chevak, AKThe pilot's misjudgment of the landing flare and failure to maintain adequate airspeed to avoid stalling the airplane.NTSB ANC94LA035Accident · No injuriesLimited investigationFinal reportCessna 402 · Kivalina, AKThe pilot's inadequate compensation for the wind conditions by landing on the left side of the runway. Factors were: inadequate snow removal and the snow covered runway.NTSB ANC93LA068Accident · No injuriesLimited investigationFinal reportCessna 402B · Kivalina, AKThe pilot's failure to check the condition of the runway before takeoff. The soft runway condition was a factor in the accident.NTSB ANC90LA132Accident · No injuriesLimited investigationFinal reportCessna C-T210 · Sleeper Bay, AKImproper fuel tank selection.NTSB ANC88FA111Accident · 2 fatalField investigationFinal reportCessna 402B · Mt. Torbet, AKThe on-demand-charter flight was to originally pickup passengers and cargo but a landing gear problem forced another airplane with a mechanic to be dispatched. The other airplane returned with the passengers and the accident airplane was repaired by the…NTSB ANC88FA019Accident · Minor injuriesField investigationFinal reportCessna 402B · Anchorage, AKDrg arr in hvy traffic, reeve flt 726 (Boeing 727) & wilburs flt 304 (Cessna 402B, N969JW) recd radar adzys for visual apchs to rwys 6L & 6R, respectively. Subsequently, both flts were clrd to lnd. At 1555:04, the LCL twr ctlr transmitted that the wnd at the…NTSB ANC88IA013Incident · No injuriesIncident investigationFinal reportCessna 402B · Cordova, AKThe company maintenance personnel were aware of a shimmy problem but they thought is was only worn bushings. The maintenance people stated they inspected the part but found no problem. The pilot-in-command also stated he found no problem upon visually…NTSB ANC87LA162Accident · No injuriesLimited investigationFinal reportCessna 206G · 100mi S.Kng Slm, AKThe aircraft experienced an engine power loss while in cruise flight and subsequently undershot a lake during the emergency landing. Examination of the engine revealed the number 2 bearing was found completely disintegrated and missing from its seat. Evidence…NTSB ANC87IA011Incident · No injuriesIncident investigationFinal reportCessna 402C · Kivalina, AKThe roll pin and safety wire which retain the main landing gear forward trunnion pin were broken and the forward trunnion pin on the right main landing gear was found 'backed out', thereby releasing the right main landing gear trunnion.NTSB ANC84LA177Accident · Serious injuriesLimited investigationFinal reportCessna P210N · Point Hope, AKThe acft crashed during an attempted night takeoff with the plt controlled rwy lights turned off. The plt stated he had consumed a couple of alchoholic beverages earlier in the evening; and although approached by several people to fly, he stated he refused…NTSB ANC84LA174Accident · Minor injuriesLimited investigationFinal reportCessna T-207 · Daniels Creek, AKPilot stated that after landing 100 feet past the runway threshold, the aircraft appeared not to be stopping when brakes were applied. A go-around was initiated, but the aircraft failed to get airborne and ran off the departure end ofthe strip colliding with…NTSB ANC84FA065Accident · No injuriesField investigationFinal reportCessna TP206D · Homer, AKThe eng quite once, but the plt was able to restart it by turning on the boost pump. He landed at 2 different arpts after the initial failure, once to refuel & drain the fuel tanks & once to check the fuel lines & components under the cowling. Aprx 1 hr after…NTSB ANC83LA057Accident · No injuriesLimited investigationFinal reportCessna TU206G · Glennallen, AKThe acft collided with a snowbank and ground looped during landing on a snow covered narrow runway. The pilot had been inactive in flying for several years and had recently purchased the accident acft. He had 9 hours dual and 3 hours solo in this acft. He…NTSB ANC82DA047Accident · No injuriesFinal reportCessna 402B · Grayling, AKThe left main landing gear collapsed during landing rollout. Part of the landing gear system failed in shear overstress.NTSB ANC81FA108Accident · 4 fatalClosedCessna 340A · Ketchikan, AKNTSB ANC79DA098Accident · Minor injuriesClosedCessna T207A · Scammon Bay, AKNTSB ANC79FA068Accident · 7 fatalClosedCessna 402B · Anchorage, AKNTSB ANC78FA018Accident · 5 fatalClosedCessna 320D · Wrangell, AKNTSB ANC75AA060Accident · Minor injuriesClosedCessna 402B · Barrow, AK