NTSB investigations: Hiller UH-12E, CA
98 cases on aircraft the registry lists as Hiller UH-12E. 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
| 1965 | 5 |
|---|---|
| 1966 | 4 |
| 1968 | 1 |
| 1973 | 3 |
| 1975 | 2 |
| 1976 | 2 |
| 1977 | 2 |
| 1978 | 5 |
| 1979 | 4 |
| 1980 | 4 |
| 1981 | 6 |
| 1982 | 1 |
| 1983 | 7 |
| 1984 | 3 |
| 1985 | 3 |
| 1986 | 6 |
| 1988 | 4 |
| 1989 | 2 |
| 1990 | 1 |
| 1991 | 2 |
| 1992 | 4 |
| 1993 | 3 |
| 1994 | 1 |
| 1995 | 4 |
| 1996 | 1 |
| 1997 | 1 |
| 1998 | 1 |
| 1999 | 3 |
| 2000 | 1 |
| 2001 | 1 |
| 2005 | 1 |
| 2010 | 3 |
| 2011 | 3 |
| 2013 | 1 |
| 2015 | 2 |
| 2019 | 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\" = 'CA' AND c.\"eventCountry\" = 'USA'
AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('4360122', '4360137'))
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" = 'CA' AND c."eventCountry" = 'USA'
AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('4360122', '4360137'))
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 WPR20LA007Accident · Minor injuriesClass 3 · LimitedFinal reportHiller UH 12E · Susanville, CAA partial loss of engine power due to multiple overtemperature events and a hot start event, which resulted in thermally damaged internal components of the engine. Contributing to the accident was the lack of suitable terrain on which to perform the forced…NTSB WPR15LA168Accident · 1 fatalLimited investigationFinal reportHiller UH 12E · Wasco, CAAn in-flight impact with terrain for reasons that could not be determined based on available evidence.NTSB WPR15LA138Accident · No injuriesLimited investigationFinal reportHiller UH 12E · Firebaugh, CAA loss of engine power for reasons that could not be determined because postaccident examination of the engine did not reveal any anomalies that would have precluded normal operation.NTSB WPR14LA062Accident · No injuriesLimited investigationFinal reportHiller UH 12E · Chowchilla, CAThe failure of the torsional drive coupling, which resulted in a loss of drive to the main rotor system during low-altitude flight.NTSB WPR11LA267Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Lost Hills, CAThe failure of the engine-driven fuel pump, resulting in the loss of all engine power and the pilot's failure to correctly execute an autorotational landing.NTSB WPR11LA244Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Stockton, CAThe pilot's failure to maintain clearance from obstacles.NTSB WPR11CA146Accident · No injuriesData collectionFinal reportHiller UH-12E · Colusa, CAThe pilot's failure to maintain an adequate airspeed and an inadvertent encounter with settling with power while flying downwind.NTSB WPR10CA466Accident · Minor injuriesData collectionFinal reportHiller UH-12E · Mecca, CAThe pilot's failure to maintain clearance from an obstacle while maneuvering.NTSB WPR10LA127Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Los Banos, CAA partial loss of engine power due to a failure of the throttle interconnect hardware, which resulted in a hard landing.NTSB WPR10CA094Accident · Minor injuriesData collectionFinal reportHiller UH-12E · Tipton, CAThe pilot's failure to maintain clearance from terrain.NTSB LAX05CA313Accident · No injuriesData collectionFinal reportHiller UH 12-E · Five Points, CAThe pilot's failure to refuel the helicopter, which resulted in fuel exhaustion.NTSB LAX01LA245Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Blythe, CAThe selection by the pilot of an unsuitable precautionary landing site on soft, uneven terrain, which resulted in a rollover.NTSB LAX00LA077Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Five Points, CAThe pilot's inadequate clearance while maneuvering beneath a telephone line.NTSB LAX00LA027Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Castroville, CAThe pilot's inadequate visual lookout and diverted attention.NTSB LAX99LA237Accident · No injuriesLimited investigationFinal reportHiller UH-12ET · Williams, CAThe pilot's inadequate preflight planning and verification that fuel was available for the intended flight. A factor was the fuel quantity false indication.NTSB LAX99LA081Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Lemoore, CAThe inadequate nature of the operator's maintenance, which failed to detect the primer and magneto discrepancies. An overly lean fuel mixture and/or magneto cross firing resulted in detonation, an ensuing connecting rod failure, and a total loss of engine…NTSB LAX98LA089Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Chico, CAFuel exhaustion due to the pilot's failure to ensure that an adequate fuel supply was onboard. A contributing factor was related to the fuel quantity gage's erroneous indication of fuel.NTSB LAX97LA179Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Truckee, CAA loss of engine power for undetermined reasons. A factor in the accident was the unsuccessful attempt to release the long line from the belly hook after it became entangled in a tree.NTSB LAX96LA279Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Healdsburg, CAThe failure of the pilot to confirm a loss of power before entering autorotation after reading an erroneous instrument indication on the helicopter's dual tachometer. Factors in the accident were the erratic instrument, and maintenance personnel who failed to…NTSB LAX95LA318Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Dos Palos, CAthe fatigue failure of the tail rotor tension torsion bar plates.NTSB LAX95LA132Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Five Points, CAfuel exhaustion due to the pilot's inattention to the fuel supply.NTSB LAX95LA109Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Arvin, CAThe seizure of the transmission due to lack of lubrication from a plugged oil supply line.NTSB LAX95LA096Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Chowchilla, CAthe in-flight failure and separation of the main rotor hub due to a fatigue crack.NTSB LAX95LA005Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Salinas, CAan in-flight engine compartment fire for undetermined reasons.NTSB LAX94LA054Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Salinas, CAa fatigue failure of the torsion-tension bar pin due to fretting corrosion. A factor in this accident was an inadequate quality of material utilized in the manufacture of the pin.NTSB LAX94LA043Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Salinas, CAThe pilot's improper handling of the helicopter which resulted in overloading of the rotor system in a maneuvering turn during aerial application of chemical, and subsequent failure of the main rotor paddle assembly.NTSB LAX93LA319Accident · Serious injuriesLimited investigationFinal reportHiller UH-12E · Dixon, CAthe failure of the pilot to visually detect and avoid the guy wire.NTSB LAX92LA401Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Coachella, CAThe pilot's inadequate visual lookout and his failure to maintain an adequate clearance from the wires.NTSB LAX92LA349Accident · Minor injuriesLimited investigationFinal reportHiller UH12-E, Saloy Conver · Arvin, CAThe failure of the tension torsion bar pin due to fatigue. Contributing to this accident was that it was not possible for the pilot to flare the helicopter on landing.NTSB LAX92LA152Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Watsonville, CAA failure of the pilot to conduct an adequate pre-flight inspection of the aircraft to ensure that the fuel supply was free of contaminates. Contributing to this accident was fuel contamination.NTSB LAX92LA146Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Huron, CAA separation of the control rotor cuff due to fatigue.NTSB LAX91LA249Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Huron, CAThat unknown pilot(s) impoperly used the throttle control which caused an overspeed condition. Contributing to this accident was the connecting rod bolt fatigue failure.NTSB LAX91LA191Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Delano, CAThat the pilot improperly performed the autorotation by misjudging the flare altitude. Contributing to this accident was the total failure of the freewheeling sprag clutch due to excessive wear and the soft dirt terrain.NTSB LAX90DVA08Accident · Minor injuriesFinal reportHiller UH-12-E · Los Banos, CAThe pilot's failure to maintain a lookout for obstructions along his swath run.NTSB LAX90DVA01Accident · Serious injuriesFinal reportHiller 12E · Huron, CAThe pilot failed to properly preflight the airplane before departing on the accident flight and misjudged the flare during the ensuing autorotation. Factors relating to this accident were oil starvation and total failure of the connecting rod.NTSB LAX89DVM02Accident · Minor injuriesFinal reportHiller UH-12E · Salinas, CAThe separation of the torsion coupling in the main rotor drive system.NTSB LAX88DVA16Accident · Minor injuriesFinal reportHiller UH-12E · Helm, CADuring an aerial application flight, the pilot lost control of the helicopter just after liftoff and collided with the terrain. Inspection of the wreckage revealed that the chemical trucks filler hose was still attached to the helicopter when it lifted off.NTSB LAX88DUG06Accident · Minor injuriesFinal reportHiller UH-12E · Thermal, CAShortly after refueling the helicopter & reloading the hopper, the plt took off & was starting to spray a field when the eng suddenly lost power. The plt said the helicopter was dscndg from about 30 ft when the power loss occurred; thus, he barely had time to…NTSB LAX88DUM06Accident · No injuriesFinal reportHiller UH12E · Bard, CADuring helicopter aerial application, engine power was lost. Plt applied back cyclic and tail rotor contacted terrain, followed by hard landing. Investigation revealed less than useable fuel remaining.NTSB LAX88DVA05Accident · No injuriesFinal reportHiller 12E · Firebaugh, CADuring an aerial application, the helicopter collided with a guy wire and then a field. The pilot knew that the wire was there. He stated that he simply forgot that it was there and did not see it. There were no mechanical problems prior to the accident.NTSB LAX86FVA14Accident · Minor injuriesFinal reportHiller UH-12E · Lemoore, CAThe plt reptd that while returning to the loading area after spraying a field, he heard a loud pop emanating from the engine compartment. Shortly thereafter he observed a fire in the engine compartment and lost forward and aft control of the helicopter. The…NTSB LAX86FVM08Accident · No injuriesFinal reportHiller UH 12E · Gonzales, CAA loss of power was expereinced as the acft descended into a field at the beginning of an aerial application spray run. The plt initiated a forced landing into the field. During the landing the right skid dug into the field, tipping the helicopter onto its…NTSB LAX86FVM06Accident · No injuriesFinal reportHiller UH21E · Salinas, CAThe plt experienced a 'ratcheting' to the right and a decrease in rotor RPM during cruise flt at 75-100 ft AGL. The plt made an autorotation but could not cushion the landing due to the low alt and lack of rotor RPM. The helicopter impacted hard and…NTSB LAX86DVA09Accident · No injuriesFinal reportHiller UH-12E · Delano, CAThe helicopter rotor blade delaminated shortly after departing the operator's north base at Delano, CA. The investigation determined the blade contained extensive voids on the bond line. The blade was rejected by the manufacturer as being unairworthy. The…NTSB LAX86FVM05Accident · Minor injuriesFinal reportHiller UH12E · Castroville, CAThe acft landed hard and rolled over after the lndg skid failed in a forced lndg. The plt said he was crusing at 500 ft AGL over an open field when he heard a loud bang. The helicopter began to vibrate severely and spiral to the right. The plt lost ground…NTSB LAX86LA113Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Lodi, CAWhile on an aerial agricultural spraying flight the acft engine lost total power. The plt executed an immediate autorotation landing. Upon ground contact, the acft skid for about 8 ft until the front skid contacted the ground furrow and nosed over causing the…NTSB LAX85LA305Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Gonzales, CAWhile cruising during an ag flight the acft's eng began losing pwr. At the time the acft was about 50 ft AGL & was travelling at 50 mph. The plt made a forced ldg onto a nearby plowed fld. Upon touchdown the rt skid dug into a furrow & the acft rolled over.…NTSB LAX85FA199Accident · Serious injuriesField investigationFinal reportHiller UH12J3 · Klamath, CAThe helicopter was returning to a private landing pad after a reconaisance flight prior to sprating. At about 10FT AGL after flaring and leveling the pilot could not control a drift and roll to the left. The rotor blades struck the ground within about one…NTSB LAX85FA132Accident · Minor injuriesField investigationFinal reportHiller UH12E · Five Points, CAWhile performing an ag flight the helicopter's engin suddenly lost power. At the time the aircraft was near its max allowable gross weight and it was between 3-5FT AGL. As the aircraft yawed left and descended. The pilot in command attempted to land on a…NTSB LAX85LA002Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Firebaugh, CAThe acft collided with terrain while on an aerial application flt. The plt stated he, 'heard a loud bang' while spraying. Then the 'nose of the helicopter dove radically down', and he crashed into the field. Examination of the site revealed that one of the…