NTSB investigations: Jacobs L4 /R755-7
130 cases on aircraft whose registry engine model is Jacobs L4 /R755-7. 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 | 13 |
|---|---|
| 1965 | 4 |
| 1966 | 7 |
| 1967 | 1 |
| 1968 | 5 |
| 1969 | 6 |
| 1970 | 7 |
| 1971 | 1 |
| 1972 | 7 |
| 1973 | 6 |
| 1974 | 4 |
| 1975 | 6 |
| 1976 | 2 |
| 1977 | 1 |
| 1978 | 3 |
| 1979 | 1 |
| 1980 | 1 |
| 1981 | 2 |
| 1982 | 1 |
| 1983 | 2 |
| 1984 | 1 |
| 1985 | 1 |
| 1986 | 2 |
| 1987 | 2 |
| 1988 | 2 |
| 1990 | 2 |
| 1991 | 3 |
| 1992 | 1 |
| 1994 | 1 |
| 1996 | 1 |
| 1997 | 3 |
| 1998 | 1 |
| 2000 | 2 |
| 2001 | 1 |
| 2003 | 2 |
| 2004 | 2 |
| 2005 | 2 |
| 2006 | 1 |
| 2007 | 1 |
| 2008 | 1 |
| 2009 | 2 |
| 2010 | 1 |
| 2012 | 1 |
| 2013 | 5 |
| 2016 | 2 |
| 2018 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2024 | 2 |
| 2025 | 2 |
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.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('35003'))
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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('35003'))
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 CEN26LA056Accident · Minor injuriesClass 4 · LimitedFinal reportCessna 195 · Downers Grove, ILThe pilot’s failure to maintain airplane control during an attempted go-around.NTSB WPR25LA125Accident · No injuriesClass 4 · LimitedFinal reportCessna 190 · Idaho Falls, IDThe pilot’s failure to maintain directional control during the landing roll in crosswind conditions.NTSB ERA25LA036Accident · Minor injuriesClass 4 · LimitedFinal reportCessna 195A · Bethel, PAThe pilot’s failure to maintain directional control during landing.NTSB CEN24LA280Accident · No injuriesClass 4 · LimitedFinal reportCessna 195A · Greenville, MIThe pilot’s loss of directional control during landing which led to a ground-loop.NTSB CEN21LA422Accident · No injuriesClass 4 · LimitedFinal reportCessna 195 · Ypsilanti, MIThe pilot’s failure to maintain directional control during taxi, which resulted in a ground loop.NTSB CEN20CA280Accident · No injuriesClass 4 · Data collectionFinal reportWaco YKC · New Carlisle, OHThe pilot's failure to maintain proper approach speed and descent path to the runway, which resulted in excessive speed at touchdown and insufficient runway remaining to safely bring the airplane to a stop before the end of the runway. Contributing to the…NTSB GAA18CA332Accident · No injuriesData collectionFinal reportWaco YKS 7 · Fairhope, ALThe pilot’s failure to maintain directional control while landing.NTSB ERA16CA304Accident · No injuriesData collectionFinal reportCessna 195 · Livermore Falls, METhe pilot's failure to maintain directional control during landing roll out.NTSB GAA16CA238Accident · No injuriesData collectionFinal reportWaco YKS 7 · Millersburg, OHThe pilot's loss of directional control during landing in gusting wind conditions resulting in excessive brake application, and airplane nose over.NTSB WPR14CA083Accident · No injuriesData collectionFinal reportCessna 195A · Salinas, CAThe pilot's failure to maintain directional control during the landing roll, which resulted in a ground loop.NTSB WPR13CA409Accident · No injuriesData collectionFinal reportCessna 195A · Meadow Creek, MTThe pilot's failure to maintain directional control during the takeoff roll on a rough turf runway.NTSB ERA13FA402Accident · 2 fatalField investigationFinal reportCessna T-50 · Lenox Twp., PAThe pilot's intentional visual flight into night instrument meteorological conditions and thunderstorms and his improper decision to takeoff without getting updated weather information after a briefer cautioned him during a previous flight that visual flight…NTSB WPR13CA207Accident · No injuriesData collectionFinal reportWaco YKS-7 · Rialto, CAThe pilot’s failure to maintain directional control and his improper brake usage during the landing roll in a crosswind condition.NTSB WPR13CA172Accident · No injuriesData collectionFinal reportWaco YMF-3 · Thermal, CAThe pilot’s failure to maintain directional control while landing in a gusting crosswind.NTSB ERA12LA343Accident · No injuriesLimited investigationFinal reportCessna 195A · Tipton, PAA fatigue failure of a copper oil line, which resulted in a partial loss of engine power due to oil starvation.NTSB CEN10CA213Accident · No injuriesData collectionFinal reportWaco YPF-7 · Houston, TXThe pilot's inability to maintain control during landing due to the failure of the tailwheel locking mechanism to remain engaged prior to landing.NTSB WPR09CA465Accident · No injuriesData collectionFinal reportCessna 195A · Upland, CAThe pilot's failure to maintain directional control of the airplane during the takeoff roll.NTSB ERA09CA350Accident · No injuriesData collectionFinal reportBeech C17B · Stevensville, MDThe pilot’s failure to maintain directional control of the airplane during the landing roll.NTSB NYC08CA240Accident · No injuriesData collectionFinal reportCessna C-195 · Johnstown, NYThe pilot's failure to maintain aircraft control during the landing roll.NTSB CHI07CA172Accident · No injuriesData collectionFinal reportCessna 195 · Battle Creek, MIThe pilot's failure to maintain directional control of the aircraft during the landing roll which resulted in a ground loop.NTSB ATL07LA001Accident · Minor injuriesLimited investigationFinal reportGrumman G-164 · Somerville, TNThe total loss of engine power for undetermined reasons.NTSB SEA06CA020Accident · No injuriesData collectionFinal reportCessna 195A · Heber City, UTThe failure of the right brake, which resulted in a loss of directional control during the landing roll and a nose down.NTSB CHI05LA099Accident · No injuriesLimited investigationFinal reportCessna 195A · Jackson, MIThe fracture of the left brake master cylinder piston rod, which resulted in the total failure of the left-side brake system and the subsequent loss of directional control during landing roll. An additional cause was the encountered ground-loop.NTSB NYC04LA118Accident · 1 fatalLimited investigationFinal reportCessna T-50 · Sharon, MAThe loss of power in one engine for undetermined reasons. Factors were the excessive weight, and degraded climb performance.NTSB CHI04LA083Accident · No injuriesLimited investigationFinal reportCessna 195 · Manitowoc, WIThe Cessna 195 pilot's failure to maintain clearance from the Cessna 177RG while taxiing to the ramp after landing. A contributing factor was the restricted forward visibility (blind spot) of the Cessna 195 due to the engine cowling. An additional factor was…NTSB NYC03LA120Accident · No injuriesLimited investigationFinal reportGrumman G-164 · Shiloh, NJThe pilot's improper in-flight decision to not jettison his load when he realized that he would not clear the trees. A factor was the pilot's inattention to his airspeed at liftoff and on climb.NTSB NYC03LA077Accident · No injuriesLimited investigationFinal reportWaco YOC · Allentown, PAThe pilot's failure to maintain directional control while landing which resulted in a ground loop. A factor in the accident was the crosswind.NTSB IAD01LA085Accident · No injuriesLimited investigationFinal reportCessna 195 · Moultonboro, NHThe pilot's failure to maintain directional control of the airplane. A factor was the crosswind.NTSB CHI00FA229Accident · No injuriesField investigationFinal reportCessna 195A · Oshkosh, WIThe pilots failure to maintain directional control. A factor was the landing gear being out of alignment.NTSB FTW00LA104Accident · Serious injuriesLimited investigationFinal reportCessna 195A · Roanoke, TXThe pilot's inadequate preflight resulting in loss of engine power due to water and rust contamination of the fuel. A factor was the lack of suitable terrain for the forced landing.NTSB SEA98LA193Accident · No injuriesLimited investigationFinal reportCessna T-50 · Missoula, MTA quick drain was open due to the pilot's inadequate preflight.NTSB MIA97LA222Accident · No injuriesLimited investigationFinal reportWaco YMF5 · Lake Buena Vist, FLfailure of maintenance personnel to follow installation procedures pertaining to the torque of the propeller retention nut, which resulted in a loose propeller retention nut, subsequent fatigue failure of the crankshaft, and loss of engine power. The lack of…NTSB ATL97FA095Accident · 1 fatalField investigationFinal reportBoeing Stearman B75N1 · Locust Grove, GAThe inadvertent stall encountered by the pilot after experiencing an in-flight cylinder head separation.NTSB MIA97LA058Accident · No injuriesLimited investigationFinal reportWaco WMF-5 · Kissimmee, FLthe pilot's failure to maintain direction control of the airplane after applying the brakes. A factor was the pilot's lack of familiarity with this make and model airplane.NTSB LAX96LA292Accident · No injuriesLimited investigationFinal reportWaco UPF7 · Payson, AZthe failure of the pilot to maintain directional control on touchdown and the landing ground roll.NTSB BFO94LA156Accident · No injuriesLimited investigationFinal reportCessna 195B · Ossipee, NHSeparation of the left main landing gear due to fatigue failure.NTSB LAX92LA132Accident · Minor injuriesLimited investigationFinal reportCessna 195A · San Jose, CAThe pilot's improper compensation for the existing wind conditions and improper recovery from a bounced landing. Contributing to the accident was the left quartering tail/crosswind.NTSB LAX92LA052Accident · No injuriesLimited investigationFinal reportCessna 195A · Camarillo, CAThe failure of the pilot to maintain directional control during the landing ground roll.NTSB ATL91LA141Accident · Serious injuriesLimited investigationFinal reportMaridon Starduster TOO · Locust Grove, GAFuel exhaustion which resulted from the failure of the pilots to refuel the airplane. A factor was the local pilot's having become lost.NTSB CHI91LA190Accident · No injuriesLimited investigationFinal reportCessna 195 · Detroit, MIFailure to maintain directional control, and inadequate aircraft preflight. A factor related to the accident is the instructor pilot's lack of experience in the type aircraft.NTSB FTW90LA078Accident · Minor injuriesLimited investigationFinal reportCessna T50-A17 · Brackettville, TXAn engine failure caused by a malfunctioning carburetor and the pilot's misjudging his obstacle clearance which resulted in a wire strike while maneuvering to land. Factors in the accident were the uncommanded deployment of carburetor heat on both engines, an…NTSB MKC90LA058Accident · No injuriesLimited investigationFinal reportCessna 195 · Garden City, KSDirectional control not maintained by the pilot in command.NTSB NYC88LA134Accident · No injuriesLimited investigationFinal reportBeech C17B · Butler, PAAfter landing the airplane was taxiing on runway 08 when it went off the side of the runway and struck a runway light and taxi sign. While attempting to get back on the runway, the left gear collapsed.NTSB MKC88LA045Accident · No injuriesLimited investigationFinal reportCessna 195 · Rolla, MOShortly after takeoff, during a personal flight, the engine progressively lost power. The PIC attempted an emergency ldg in a pasture. During the ldg roll, the acft collided with a tree, causing substantial damage to the right wing. Post accident aircraft…NTSB LAX88LA019Accident · No injuriesLimited investigationFinal reportCessna 195A · Modesto, CAThe pilot stated that during the end of the landing roll on runway 28L, the aircraft started turning to the right and he could not correct it and the aircraft ground looped. There were no mechanical problems reported prior to the accident. The pilot reported…NTSB BFO87LA043Accident · No injuriesLimited investigationFinal reportCessna 195A · Cambridge, MDAfter purchasing the acft in atl, the plt, who held an a & p certificate, inspected and flew the acft in the local area bfr departing on a ferry flt to rockland, ME. Drg lndg at his first fuel stop, the acft swerved to the rt and the plt intentionally…NTSB FTW86FRG24Accident · No injuriesFinal reportGrumman G-164 · La Feria, TXAs the plt was making a swath run, he started to cross under power lines, but saw the profile view of a road marker. When he pulled up to avoid the road marker, the acft struck the wires, rolled to the left & collided with the ground.NTSB LAX86LA189Accident · Serious injuriesLimited investigationFinal reportCessna 195A · San Rafael, CAThe two aircraft collided on the runway during landing approach. The Cessna pilot had washed his aircraft and had made a local flight to dry it off. The beeck pilot was returning from a nearby airport where an annual inspection had been performed. Witnesses…NTSB LAX85LA110Accident · Minor injuriesLimited investigationFinal reportWaco YKC · Placerville, CAAcft was lined up on rwy but plt misjudged height and acft stalled aprx 3 ft above the ground. Acft bounced and upon contacting the ground veered right. Plt over compensated and acft ground looped traveling off left side of rwy into a road. The pond is aprx…NTSB MKC84FA272Accident · 2 fatalField investigationFinal reportCessna 195A · Akron, IAN19JW, a Cessna 195A and N8783X, a Cessna 182 departed mapleton, IA, at aprx 0805 on a VFR flt to Akron, IA, to attend a fly-in breakfast. The two acft did not travel the same route of flight to Akron, N19JW crossed over the midpoint of the arpt on crosswind…