NTSB investigations: Franklin 6V4 series
285 cases on aircraft whose registry engine model is Franklin 6V4 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, newest first
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 ('27033'))
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 ('27033'))
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 ATL92LA017Accident · No injuriesLimited investigationFinal reportBell 47D-1 · Rome, GAThe failure of a tail rotor blade for undetermined reasons.NTSB SEA91LA233Accident · Minor injuriesLimited investigationFinal reportBell 47G · Miltonfreewater, ORPilot factor in that the pilot failed to insure there was adequate clearance from obstacles for a safe takeoff. A factor to the accident was: the pilot's poor preflight planning/preparation.NTSB CHI90DEC04Accident · Serious injuriesFinal reportBell 47 D-1 · Stockbridge, MIThe restricted visual lookout which resulted from the canopy fogging up.NTSB NYC90DGM02Accident · 1 fatalFinal reportBell 47D1 · Meadville, PAThe pilot's failure to see and avoid the power lines.NTSB BFO90LA042Accident · No injuriesLimited investigationFinal reportBell 47D · Baltimore, MDThe pilot applied excessive cyclic control, causing the main rotor to flex and severe the tail cone.NTSB MIA90LA111Accident · No injuriesLimited investigationFinal reportHiller UH-12B · Sanford, FLLoss of engine power for an unknown reason.NTSB ATL90DLQ01Accident · No injuriesFinal reportBell 47D1 · Hickman, KYImproper in-flight planning/decision by the pilot. The resultant tailwind was a related factor.NTSB MIA90LA023Accident · Serious injuriesLimited investigationFinal reportBell 47D1 · Loxahatchee, FLFailure of the pilot to maintain rotor RPM after pulling up from a swath run. A related factor was the presence of trees.NTSB MKC89LA195Accident · No injuriesLimited investigationFinal reportBell 47G · Ozark, MOThe failure of the dual student to properly flare during an autorotative landing resulting in a hard landing and partial failure of the right skid. The CFI also failed to properly monitor the student's actions on the flight controls.NTSB SEA89LA120Accident · Minor injuriesLimited investigationFinal reportBell 47G-2 · Centralia, WAThe pilot misjudged his clearance over trees, which resulted in an in-flight tail rotor strike with the trees and loss of tail rotor control. The trees were a related factor.NTSB ATL89DLT03Accident · No injuriesFinal reportBell 47 · Shelbyville, TNFailure in the rotor drive system for unknown reasons. Contributing to the accident was the pilot's inability to perform an autorotation.NTSB MIA89LA133Accident · Serious injuriesLimited investigationFinal reportBell 47D1 · Miami, FLThe unqualified persons failure to maintain clearance from the fence. Pressure induced by others, lack of experience, and over confidence in personal ability are contributing factors to this accident.NTSB FTW89DPA03Accident · Serious injuriesFinal reportBell 47-D1 · Allen, TXUnqualified pilot's poor judgement in leveling the helicopter during the flare and contributing to this was his lack of total experience in this type aircraft.NTSB MIA88LA212Accident · No injuriesLimited investigationFinal reportBell 47D1 · Ruleville, MSDuring an aerial application flt while spraying chemicals the plt reported that the engine quit. The pilot attempted an autorotation but was too low and slow to complete it. The aircraft landed hard in the field of crops and nosed over. Examination of the…NTSB LAX88LA160Accident · No injuriesLimited investigationFinal reportBell 47D1 · Taft, CANTSB MKC88FA054Accident · 1 fatalField investigationFinal reportBell 47D1 · Nixa, MODuring the process of moving the helicopter from the hangar the right skid slipped off the concrete helipad and became stuck in the mud. The pilot attempted to dislodge the skid by bringing the aircraft to a hover. The left skid became airborne and contacted…NTSB SEA87LA172Accident · Serious injuriesLimited investigationFinal reportBell 47G2 · Grandview, WAAfter the completion of spray operations the pilot was attempting to place the helicopter onto a trailer. The pilot misjudged his position, over-corrected, and then lost control of the helicopter, striking the ground.NTSB LAX87LA294Accident · No injuriesLimited investigationFinal reportBell 47D-1 · Taft, CAThe plt rprtd the eng lost power at about 300' AGL after the helicopter had flown aprx 2.7 hrs without refueling. He initiated an autorotative landing; however, before touchdown, the main rotor blades contacted & severed the tail boom. An exam revealed the…NTSB ATL87LA204Accident · No injuriesLimited investigationFinal reportBell 47D1 · Huntsville, ALThe aerial application flight was dispensing insecticides on a cotton field. While maneuvering to avoid powerlines during the procedure turnaround following an upwind swath run, the pilot failed to maintain sufficient airspeed to ensure effective…NTSB ATL87DEI05Accident · Minor injuriesFinal reportBell 47G-2 · Lisbon, OHThe helicopter rolled over as it was lifting off from a transport trailer. A post-crash exam revealed that the left rear tie-down strap on the trailer was wrapped around one of the helicopter skids. The ground crewman believed he had removed all of the straps…NTSB ATL86FEI07Accident · 1 fatalFinal reportBell 47G2 · Lisbon, OHThe aerial application helicopter was being serviced by a chemical truck that was parked adjacent to the acft. The acft engine was at high idle with the main rotor turning at 250 RPM. The ground crewman jumped off the side of the chemical truck into the main…NTSB LAX85LA249Accident · No injuriesLimited investigationFinal reportHiller 12-C · Casa Grande, AZThe plt was demonstrating autorotations to a touchdown on a dirt rwy into a 5 kt headwind. On the final landing he said that the touchdown felt the same as others he had done. Speed at touchdown was 15 mph and the helicopter slid forward in a straight line…NTSB LAX85LA079Accident · No injuriesLimited investigationFinal reportBell 47G · Chatsworth, CAThe plt was practicing off airport touch & go's. on the second lndg the left skid contacted a hidden dirt embankment andthe acft rolled over. A post impact fire consumed the aircraft. Both certificated commercial plts aboard the helicopter escaped unharmed.…NTSB FTW85LA074Accident · Serious injuriesLimited investigationFinal reportBell 47D1 · Ardmore, OKThe acft collided with power lines during a recovery from a practice autorotational landing. The instructor plt took control of the acft for recovery and did not see the wires.NTSB FTW85LA043Accident · No injuriesLimited investigationFinal reportBell 47D1 · Terlingua, TXShortly after the plt took off on a sight-seeing flt, the eng lost power when the helicopter was over rough terrain at about 200 ft AGL. During an autorotative landing, the helicopter rocked forward causing the main rotor blades to strike the tail boom.…NTSB CHI84LA184Accident · Serious injuriesLimited investigationFinal reportBell 47D1 · Alpena, MIPrior to the accident, the owner/plt of the helicopter reportedly 'buzzed' a local baseball game. Shortly after that, the helicopter was observed to maneuver over a wooded area, enter a nose high attitude, then roll or bank & enter a descent into a wooded…NTSB CHI84LA181Accident · No injuriesLimited investigationFinal reportBell 47D-1 · Ridge Farm, ILThe helicopter rolled over after a hard landing following loss of rotor RPM. The plt reported that during initial climb at about 300 ft AGL the rotor decreased about 500 RPM. He tried to regain rotor RPM until about 100 ft AGL and then tried an autorotation.…NTSB MIA84FA058Accident · 1 fatalField investigationFinal reportHiller UH-12C · San Juan, PRA performer fell from a trapeze rigged below the helicopter while it was hovering at about 150 ft AGL. The FAA had not authorized the modification to the acft. The plt was not certified for external load operations. The performer reportedly had not done this…NTSB LAX84LA108Accident · No injuriesLimited investigationFinal reportBell 47G · El Cajon, CADuring a demonstration to show his student how to autorotate fm a 2 ft height AGL the instructor reduced pwr and inadvertently applied fwd cyclic. The front portion of the skids hit the gd followed by the main rotor blades. Helicopter then rocked backwards,…NTSB SEA83LA069Accident · No injuriesLimited investigationFinal reportContinental Copters Mkiii · Pasco, WAWhile repositioning the helicopter from the ground onto a trailer the acft rolled over when the right skid caught onto the trailer.NTSB DEN83LA007Accident · No injuriesLimited investigationFinal reportHiller UH-12C · Blanding, UTThe private single-engine pilot had a student helicopter certificate. He took off to hover and check that the helicopter was in good condition. He stated that before takeoff, the helicopter was fueled with a 5 gallon can that had been painted red. Before…NTSB LAX82FA341Accident · Minor injuriesField investigationFinal reportBell 47G-2 · San Diego, CAThe plt was in the local pattern practicing maneuvers. After completing a quick stop maneuver & hovering, another takeoff was initiated. The plt stated that it seemed to take an unusual amount of forward cyclic to initiate forward flt. During the final…NTSB CHI82DA196Accident · No injuriesFinal reportBell 47D1 · Le Sueur, MNDuring a spraying operation, the aircraft was being refueled from a 200 gal fuel tank, mounted on the rear of a truck. The truck was parked on a slight slope with the outlet for the servicing hose at the lower end. After the helicopter was serviced with 14…NTSB FTW82DA198Accident · No injuriesFinal reportBell 47D1 · Jonesboro, ARAfter loading 40 gallons of herbicide on the aircraft the pilot attempted to lift off the back of the loading truck. The takeoff was normal; however, as the helicopter cleared the truck, it was not able to sustain a hover. The pilot then executed a running…NTSB FTW82DA189Accident · No injuriesFinal reportBell 47D-1 · Harrisburg, ARDuring an agricultural spraying operation the pilot turned downwind and the tail rotor struck a rice dike. The pilot lost control and the aircraft landed hard. The main rotor severed the tail boom. Investigation revealed the aircraft had been loaded within…NTSB CHI82DA176Accident · Minor injuriesFinal reportBell 47G-1 · Cincinnati, OHThe fore and aft cyclic control linkage tube became disconnected in flight. An emergency descent, using collective "s" turns to reduce airspeed was performed. The pilot intentionally collided with trees during the forced landing to cushion the fall.…NTSB NYC82DA087Accident · No injuriesFinal reportHiller UH-12A · New Paltz, NYWhile cruising at 400 ft AGL, the pilot noticed a decay in the main rotor RPM; however, the engine RPM was reported to have remained constant. The pilot suspected a mechanical failure and elected to make a precautionary landing in an apple orchard. During the…NTSB FTW82DA073Accident · No injuriesFinal reportBell 47G · Dallas, TXThe pilot attempted to land on a narrow flatbed trailer. He stated that he encountered some buffeting from the wind funneling between two hangars. On his third attempt to position the helicopter on the trailer, the right skid slipped off. The main rotor…NTSB LAX81FUJ85Accident · Minor injuriesClosedBell 47D1 · Poston, AZNTSB MKC81DCQ43Accident · No injuriesClosedBell 47G-2 · Sublette, KSNTSB SEA81FYP12Accident · No injuriesClosedBell 47G-2 · Union Gap, WANTSB FTW81FA045Accident · Minor injuriesClosedBell 47D1 · Roanoke, TXNTSB LAX81DUG05Accident · No injuriesClosedHiller Acft UH-12B · Rialto, CANTSB LAX80DVA64Accident · No injuriesClosedBell 47G · Bakersfield, CANTSB CHI80FEC26Accident · 1 fatalClosedBell 47D1 · Munith, MINTSB CHI80DEV30Accident · No injuriesClosedBell 47D-1 · Rantoul, ILNTSB FTW80FPM14Accident · 1 fatalClosedBell 47G · Calvin, OKNTSB LAX80FVM17Accident · No injuriesClosedBell 47D1 · Salinas, CANTSB LAX80FUQ11Accident · No injuriesClosedBell 47G · Pacoima, CANTSB NYC80FHD07Accident · No injuriesClosedHiller UH12B · Mount Holly, NJ