Skip to content

NTSB investigations: Lycoming VO-435 series, MN

30 cases on aircraft whose registry engine model is Lycoming VO-435 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.

Defining event

Finding

Phase of flight

Aircraft model

Cases per year

19642026

NTSB investigations: Lycoming VO-435 series, MN per year, 1964–2026: 30 cases
1964	1
1965	1
1966	1
1969	1
1970	1
1971	2
1972	1
1973	2
1974	1
1975	1
1978	1
1979	1
1980	1
1981	3
1986	1
1990	1
1997	1
2001	1
2002	1
2003	1
2004	1
2011	1
2013	1
2014	2
2018	1

Where

Latest cases

Query with 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" = 'MN' 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 ('41525')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

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\" = 'MN' 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 ('41525'))
  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" = 'MN' 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 ('41525'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

Run 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 CEN18LA300Accident · Minor injuriesLimited investigationFinal reportContinental Copters Tomcat MK5A · Le Sueur, MNThe pilot's inadequate preflight and in-flight fuel planning, during which he did not visually check the fuel quantity in the fuel tanks and instead relied on the fuel gauges that were showing erroneous fuel quantity indications, which resulted in fuel…Jul 27, 2018 · N9005T · Substantial damage NTSB CEN14CA391Accident · No injuriesData collectionFinal reportContinental Copters Tomcat MK5A · Osage, MNThe total loss of engine power due to water contamination of the fuel, which resulted in the pilot's forced landing and impact with terrain. Contributing to the accident was the pilot's decision to operate the helicopter without resolving the fuel…Jul 25, 2014 · N161SH · Substantial damage NTSB CEN14LA418Accident · 1 fatalLimited investigationFinal reportTexas Helicopter OH 13H/M74A · Little Falls, MNThe pilot's failure to maintain clearance from a tree at the edge of a field that he was spraying.May 28, 2014 · N51853 · Substantial damage NTSB CEN13LA537Accident · No injuriesLimited investigationFinal reportContinental Copters Tomcat MK5A · Arlington, MNThe pilot’s failure to maintain control of the helicopter while maneuvering when he removed his hand from the collective control while plugging in his radio connection to his helmet, which resulted in the collective moving to the full-down position.Sep 6, 2013 · N9005T · Substantial damage NTSB CEN11CA525Accident · No injuriesData collectionFinal reportBell 47G-2A · Nicolett, MNThe pilot's failure to maintain control of the helicopter while maneuvering during an aerial application flight.Jul 27, 2011 · N7578 · Substantial damage NTSB CHI04CA180Accident · No injuriesData collectionFinal reportTexas Helicopter M-74 · Clear Lake, MNThe pilot failed to maintain a proper glidepath to the landing zone. A factor was the truck pad.Jul 9, 2004 · N10009 · Substantial damage NTSB CHI03LA210Accident · Serious injuriesLimited investigationFinal reportBell 47G-5 · Cleveland, MNThe pilot's inadequate visual lookout and low altitude flight when he failed to maintain altitude/clearance from the transmission wire. A factor contributing to the accident was the transmission wire.Jul 15, 2003 · N7925J · Destroyed NTSB CHI02LA163Accident · Minor injuriesLimited investigationFinal reportBell 47G-2A-1 · Jordan, MNThe loss of engine power due to improper maintenance by unknown maintenance personnel which led to a misalignment of the gearbox casing.Jun 11, 2002 · N8542D · Substantial damage NTSB CHI01LA259Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Blooming Prairi, MNThe reported loss of engine power for undetermined reasons during a the cruise portion of a CFR part 137 observation, and the pilot not following the height/velocity charts data.Aug 5, 2001 · N440TG · Substantial damage NTSB CHI97LA306Accident · Serious injuriesLimited investigationFinal reportBell 47 · Pipestone, MNthe fracture of the pitch control rod assembly.Sep 30, 1997 · N9005T · Substantial damage NTSB MKC90LA138Accident · No injuriesLimited investigationFinal reportHiller 12-E · Watson, MNPilot misjudged his flare and collided with the terrain.Jun 26, 1990 · N62397 · Substantial damage NTSB CHI86FER11Accident · Serious injuriesFinal reportBell 47G-5 · Brooten, MNAccording to the pilot, the helicopter collective control failed to respond to a climb input to level off after a descent for an agricultural swath run. Fire and impact damage to the helicopter was extensive, however one broken rod end in the collective…Jun 17, 1986 · N8122J · Destroyed NTSB CHI82DER14Accident · No injuriesClosedBell 47G2 · Kerrick, MNNov 28, 1981 · N13298 · Substantial damage NTSB CHI81FER60Accident · No injuriesClosedBell 47G3B1 · Stewart, MNAug 12, 1981 · N96671 · Substantial damage NTSB CHI81DER47Accident · No injuriesClosedBell 47G-2 · Gully, MNJun 27, 1981 · N6744D · Substantial damage NTSB CHI80FER50Accident · Minor injuriesClosedBell OH-13H · Olivia, MNJun 23, 1980 · N51862 · Destroyed NTSB MKC79DER70Accident · No injuriesClosedBell 47G-2 · St.Peter, MNSep 2, 1979 · N59H · Substantial damage NTSB MKC78FER45Accident · Minor injuriesClosedBell 47G-2A · Arden Hills, MNMay 17, 1978 · N7578 · Destroyed NTSB MKC75DER73Accident · No injuriesClosedBell 47G2 · Rosemount, MNJun 3, 1975 · N108DA · Substantial damage NTSB MKC75DER12Accident · No injuriesClosedBell 47G-2 · Meridan, MNAug 5, 1974 · N2870B · Substantial damage NTSB MKC73DER66Accident · No injuriesClosedBell 47G-2 · Brainerd, MNJun 1, 1973 · N65520 · Substantial damage NTSB MKC73AK059Accident · No injuriesClosedBell 47G-2 · Owatonna, MNApr 6, 1973 · N38926 · Substantial damage NTSB MKC73FER04Accident · Minor injuriesClosedEL Tomcat MK6B · Miesville, MNJul 5, 1972 · N7840S · Destroyed NTSB MKC72DER18Accident · Minor injuriesClosedBell 47G-5 · Blomkist, MNAug 25, 1971 · N7840S · Destroyed NTSB MKC71DER74Accident · Minor injuriesClosedBell 47G2 · Franklin, MNJun 15, 1971 · N13298 · Substantial damage NTSB MKC71DDM14Accident · No injuriesClosedBell 47G-2 · Morton, MNJul 27, 1970 · N13298 · Substantial damage NTSB MKC70F0169Accident · Minor injuriesClosedBell 47G-2 · Lakeville, MNJul 19, 1969 · N2490B · Substantial damage NTSB MKC66A0065Accident · No injuriesClosedBell 47D1 · Maple Plain, MNJun 15, 1966 · N4252A · Destroyed NTSB MKC65A0072Accident · No injuriesClosedBell 47G2 · Brooklyn Prk, MNJun 10, 1965 · N2813B · Substantial damage NTSB UNK64X2623Accident · Serious injuriesClosedBell 47G2 · Lake Lillian, MNJul 3, 1964 · N262MV · Destroyed