# NTSB investigations: Hiller UH-12E NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. Page 4 of 9 · 415 cases ## Cases, newest first - [NTSB DEN86LA016](https://openairdocs.org/ntsb/DEN86LA016.md): Hiller UH-12E · Vernal, UT · Accident · No injuries · Limited investigation · Final report · Nov 1, 1985 · N400AH · Substantial damage > The plt stated he had just departed a site located on top of a mountain, which is approximately 12,200 ft MSL. The pilot said 30 seconds later, the helicopter lost partial power. Requiring him to make a force landing. The inspection of the turbocharger… - [NTSB LAX85LA305](https://openairdocs.org/ntsb/LAX85LA305.md): Hiller UH-12E · Gonzales, CA · Accident · No injuries · Limited investigation · Final report · Jul 5, 1985 · N161HA · Substantial damage > While 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 SEA85LA126](https://openairdocs.org/ntsb/SEA85LA126.md): Hiller UH-12E · Athena, OR · Accident · No injuries · Limited investigation · Final report · May 31, 1985 · N37HS · Destroyed > The acft settled back to the ground shortly after takeoff before achieving translatioanal lift. The plt was attempting to test a new spray unit that had been installed. He had put 80 gallons of water in the spray tanks. - [NTSB SEA85LA107](https://openairdocs.org/ntsb/SEA85LA107.md): Hiller UH-12E · Fall Creek, OR · Accident · No injuries · Limited investigation · Final report · May 5, 1985 · N28872 · Substantial damage > The helicopter sustained substantial damage during a forced landing following a loss of power. According to the plt, the helicopter was refueled aprx 1 hr flt time prior to the accident. Cause of the power loss was not determined. - [NTSB DEN85IA117](https://openairdocs.org/ntsb/DEN85IA117.md): Hiller UH-12E · Broomfield, CO · Incident · No injuries · Incident investigation · Final report · Apr 17, 1985 · N7411N · Minor damage > Pilot was taking FAA checkride for atp-rotocraft. Examiner requested autorotation demonstration with power recovery due to high gusty winds. Pilot said autorotation was normal until 75-100 ft AGL when rate of descent became excessive. Pilot said before he… - [NTSB LAX85FA199](https://openairdocs.org/ntsb/LAX85FA199.md): Hiller UH12J3 · Klamath, CA · Accident · Serious injuries · Field investigation · Final report · Apr 12, 1985 · N545HA · Destroyed > The 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 LAX85FA132](https://openairdocs.org/ntsb/LAX85FA132.md): Hiller UH12E · Five Points, CA · Accident · Minor injuries · Field investigation · Final report · Feb 3, 1985 · N5323V · Substantial damage > While 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 SEA85LA031](https://openairdocs.org/ntsb/SEA85LA031.md): Hiller UH-12ET · Hoquiam, WA · Accident · Minor injuries · Limited investigation · Final report · Dec 18, 1984 · N100LM · Substantial damage > Plt reported that while in normal cruise flight, a total loss of power occurred. Autorotation was effected in mountainous, wooded terrain. Examination of the engine showed continuity and freedom of rotation. Examination of the fuel system disclosed no… - [NTSB LAX85LA002](https://openairdocs.org/ntsb/LAX85LA002.md): Hiller UH-12E · Firebaugh, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 5, 1984 · N161HA · Substantial damage > The 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… - [NTSB LAX84LA494](https://openairdocs.org/ntsb/LAX84LA494.md): Hiller UH12ET · Yuma, AZ · Accident · Serious injuries · Limited investigation · Final report · Sep 25, 1984 · N9278Z · Destroyed > The pilot stated that he was carrying a load of pesticide for application on a broccoli field. The aircraft was in level flight, approximately 4 to 8 feet AGL when it became uncontrollable and impacted the ground. The aircraft was consumed by a post crash… - [NTSB LAX84LA428](https://openairdocs.org/ntsb/LAX84LA428.md): Hiller UH-12ET · Delano, CA · Accident · Serious injuries · Limited investigation · Final report · Aug 4, 1984 · N5359V · Substantial damage > The Hiller UH-12 helicopter (with a soloy conversion) was on a spray run when the eng began losing power. The plt headed for an 'open spot in the trees', but all power was lost the acft collided with almond trees. Only 15 to 18 ozs of fuel were remaining in… - [NTSB SEA84LA174](https://openairdocs.org/ntsb/SEA84LA174.md): Hiller UH-12E · Redmond, OR · Accident · Minor injuries · Limited investigation · Final report · Jul 16, 1984 · N1043L · Substantial damage > The acft collided with the ground after a in-flt main rotor blade separation during an aerial application flt. Inspection of the fracture surface of the failed blade revealed characteristics consistant with the high stress, low cycle fatigue. Lab findings… - [NTSB LAX84LA373](https://openairdocs.org/ntsb/LAX84LA373.md): Hiller UH-12E · Yuba City, CA · Accident · No injuries · Limited investigation · Final report · Jun 27, 1984 · N530HA · Substantial damage > After dispensing 8 loads, the plt refueled & took off with the 9th load. About 4 to 6 seconds into the flt, while approaching transitional lift at aprx 6 ft AGL, the helicopter began a vibration & immediately lost rotor RPM. The plt initiated a landing… - [NTSB NYC84LA212](https://openairdocs.org/ntsb/NYC84LA212.md): Hiller 12E · Meadville, PA · Accident · No injuries · Limited investigation · Final report · Jun 17, 1984 · N4033P · Substantial damage > The acft flew into wires during a crop spraying mission. The acft was flying at about 5-10 ft when a flash was seen overhead. The acft vibrated and slowed before impacting the ground and rolling over. - [NTSB DEN84LA177](https://openairdocs.org/ntsb/DEN84LA177.md): Hiller UH-12E · Granby, CO · Accident · No injuries · Limited investigation · Final report · Jun 11, 1984 · N504HA · Substantial damage > The helicopter plt was on a reconnaissance flt to survey a hilltop landing site in mountainous terrain. When he arrived, he made a high reconnaissance pass, then began a low reconnaissance apch. He estimated the wind was from 210 deg at 10 to 15 KTS with… - [NTSB NYC84FGM04](https://openairdocs.org/ntsb/NYC84FGM04.md): Hiller UH-12E · Sigel, PA · Accident · No injuries · Final report · Jun 2, 1984 · N109EH · Substantial damage > The plt was on an aerial application flt over a wooded area. According to him, he had a tail rotor problem & it was necessary to extend his glide to reach an open area. Subsequently, the helicopter landed hard & the main rotor blades struck & severed the tail… - [NTSB MKC84LA153](https://openairdocs.org/ntsb/MKC84LA153.md): Hiller 12E · Bedford, IA · Accident · Minor injuries · Limited investigation · Final report · May 29, 1984 · N2726C · Substantial damage > The plt had made two swath runs & was descending to begin the third. He stated that the turn was downwind & as he approached the level-off altitude he encountered a downdraft. The acft impacted the ground & rolled over. The plt also stated that the downdraft… - [NTSB MKC84LA128](https://openairdocs.org/ntsb/MKC84LA128.md): Hiller UH-12E · Pocahontas, AR · Accident · No injuries · Limited investigation · Final report · Apr 24, 1984 · N9740C · Destroyed > The acft crashed after an engine failure during a swath run at an alt of 20 ft AGL. Examination of the engine revealed 3 dowel pins and 6 screws which hold the starter drive gear and the accessory drive gear had sheared. Metallurgical exam revealed that dowel… - [NTSB SEA84LA091](https://openairdocs.org/ntsb/SEA84LA091.md): Hiller UH-12E · Buxton, OR · Accident · No injuries · Limited investigation · Final report · Apr 19, 1984 · N56BA · Substantial damage > The helicopter entered an uncontrolled right roll while lifting off from a trailer & struck the ground with the m/r. the plt reported the trailer was not level. - [NTSB MIA84FA078](https://openairdocs.org/ntsb/MIA84FA078.md): Hiller UH-12E · Waldo, FL · Accident · Serious injuries · Field investigation · Final report · Feb 15, 1984 · N19MP · Destroyed > The acft was being used to dispense aerial incendiary devices (aids) to control forest burning. The aids were 1.25 inch diameter polystyrene balls containing potassium permanganate. They were injected with ethylene glycol prior to being dropped out of the… - [NTSB SEA84LA034](https://openairdocs.org/ntsb/SEA84LA034.md): Hiller UH-12E · Mapleton, OR · Accident · Minor injuries · Limited investigation · Final report · Jan 5, 1984 · N4027K · Substantial damage > While approaching the spray area, the acft was in a level attitude at 20 to 25 mph & about 100 ft AGL when the plt heard a loud bang & noted a loss of power. He attempted an autorotative landing. During touchdown on hilly terrain, the acft rolled to the right… - [NTSB LAX84LA010](https://openairdocs.org/ntsb/LAX84LA010.md): Hiller UH12E · Los Banos, CA · Accident · No injuries · Limited investigation · Final report · Oct 10, 1983 · N4026G · Substantial damage > The plt loaded the helicopter & started a spraying operation. He stated that as he pulled the helicopter up from the 1st spray run, it started shaking & went partially out of control. He was able to regain enough control to get the helicopter in level flt… - [NTSB SEA84LA002](https://openairdocs.org/ntsb/SEA84LA002.md): Hiller UH12-E · Tenino, WA · Accident · No injuries · Limited investigation · Final report · Oct 2, 1983 · N401HA · Substantial damage > The plt visually checked the fuel tanks prior to takeoff & thought he had seen fuel in the tanks. The fuel gauges were inoperative & he was using timing as a method to determine the remaining fuel. Aprx 5 min after takeoff, the eng lost power as he was lining… - [NTSB ANC83LA172](https://openairdocs.org/ntsb/ANC83LA172.md): Hiller-Soloy UH12E · Cape Yakataga, AK · Accident · No injuries · Limited investigation · Final report · Sep 15, 1983 · N3324F · Substantial damage > The helicopter rolled over during a forced landing on a beach after the engine quit. Discussions with the plt owner of the company verified that the acft had run out of fuel. The owner had warned his pilots to visually check fuel on the helicopters due to… - [NTSB ATL83LA355](https://openairdocs.org/ntsb/ATL83LA355.md): Hiller UH-12E · Cameron, SC · Accident · No injuries · Limited investigation · Final report · Sep 5, 1983 · N4029R · Substantial damage > The plt stated that he was on a trimming/swath run at about 15 ft AGL & 15 mph when he heard a strange noise which was followed by a 180 deg yaw. Subsequently, the helicopter crash landed, damaging the tail boom & tail rotor blades and spreading the landing… - [NTSB MKC83LA207](https://openairdocs.org/ntsb/MKC83LA207.md): Hiller UH-12E · Corwith, IA · Accident · Minor injuries · Limited investigation · Final report · Aug 31, 1983 · N173HA · Destroyed > While en route, the plt heard a clanking noise behind him which was followed by a severe vibration of the flt controls. He initiated an autorotative descent from 3000 ft. he said the helicopter began to roll left, then righted itself. The helicopter touched… - [NTSB DEN83LA204](https://openairdocs.org/ntsb/DEN83LA204.md): Hiller UH-12E · Manning, ND · Accident · No injuries · Limited investigation · Final report · Aug 31, 1983 · N400AH · Substantial damage > The acft collided with the ground after an eng failure while stringing power lines. The acft was in a right side low, nose high attitude pulling a wire attached to the left side of the acft. The wind was from the right rear quarter when the loss of power… - [NTSB LAX83LA360](https://openairdocs.org/ntsb/LAX83LA360.md): Hiller 12E · Los Banos, CA · Accident · No injuries · Limited investigation · Final report · Jul 27, 1983 · N9770C · Destroyed > The plt had dropped off a flagman in an area to be sprayed, & had just departed & obtained translational lift when the eng lost power. The acft touched down in a freshly irrigated cotton field, rolled over inverted & burst into flames. The 'b' nut which… - [NTSB CHI83LA321](https://openairdocs.org/ntsb/CHI83LA321.md): Hiller UH-12E · Brooklyn Park, MN · Accident · No injuries · Limited investigation · Final report · Jul 18, 1983 · N120NR · Substantial damage > The plt reported that he was spraying the end rows of a field when the helicopter approached some wires. He stated that he saw the wires at the last second & tried to get under them. Reportedly, the helicopter crossed below a set of power lines, but struck a… - [NTSB LAX83LUQ04](https://openairdocs.org/ntsb/LAX83LUQ04.md): Hiller UH 12-E · Lancaster, CA · Accident · No injuries · Final report · Jul 8, 1983 · N64861 · Substantial damage > According to the pilot, after spraying an onion field he was departing for the next job when he noted an increase in engine RPM and a decrease in rotor RPM. Unable to maintain altitude, he made an emergency landing aprx 200 feet AGL. Prior to landing, the… - [NTSB CHI83LA297](https://openairdocs.org/ntsb/CHI83LA297.md): Hiller UH-12E · Brooten, MN · Accident · No injuries · Limited investigation · Final report · Jul 5, 1983 · N4028K · Substantial damage > The helicopter had just lifted off of the flatbed of a truck when it started to spin. The plt lowered the collective, reduced the power & landed beside the truck. During touchdown, the main rotor blades struck the truck. An investigation revealed that the… - [NTSB LAX83LA296](https://openairdocs.org/ntsb/LAX83LA296.md): Hiller UH12E · San Diego, CA · Accident · Serious injuries · Limited investigation · Final report · Jun 23, 1983 · N4036A · Substantial damage > The helicopter rolled over during an autorotative forced landing after a power loss. Prior to departure on the day of the accident the plt said he checked the fuel quantity on the acft. Takeoff was at about 1222 PDT. At 1256 PDT the plt arrived at destination… - [NTSB LAX83LA236](https://openairdocs.org/ntsb/LAX83LA236.md): Hiller UH-12E · Thermal, CA · Accident · No injuries · Limited investigation · Final report · May 18, 1983 · N4027L · Substantial damage > The plt reported that he was aprx 1/3 of the way thru a procedure turn at about 60 ft AGL, when he experienced a partial power loss. He completed the turn, leveled the helicopter & moumentarily regained complete power, then the engine quit operating. An… - [NTSB FTW83LA217](https://openairdocs.org/ntsb/FTW83LA217.md): Hiller UH-12E · Quanah, TX · Accident · No injuries · Limited investigation · Final report · May 3, 1983 · N138HA · Substantial damage > The helicopter was being used to search for cattle. As the plt was looking down through some bushes for cattle, the m/r blade hit a powerline wire about 25 ft AGL. - [NTSB LAX83LA181](https://openairdocs.org/ntsb/LAX83LA181.md): Hiller UH12-E · Kettleman City, CA · Accident · No injuries · Limited investigation · Final report · Apr 7, 1983 · N68024 · Substantial damage > The pilot reported that he began flying about 0725 with 23 gallons of fuel on board. He applied a herbicide for about an hour and came back to reload. After reloading he began a return to the area to be sprayed. About 10 minutes later all power was lost.… - [NTSB LAX83LA069](https://openairdocs.org/ntsb/LAX83LA069.md): Hiller UH-12E · Near Vacaville, CA · Accident · No injuries · Limited investigation · Final report · Jan 8, 1983 · N4027D · Substantial damage > The aircraft collided with a telephone wire during takeoff. The pilot made a precautionary landing on the soft bank of a levee to assess the damage and left the rotor at idle. The levee bank gave way and the helicopter slid into the ditch where the rotor… - [NTSB SEA82DA164](https://openairdocs.org/ntsb/SEA82DA164.md): Hiller-Soloy UH-12E · Spirit Lake, WA · Accident · No injuries · Final report · Sep 15, 1982 · N513HA · Substantial damage > Pilot performed autorotation from 2000 feet to check RPM. At 200-300 feet when collective was added power loss occurred. Aircraft landed hard and severed tail boom. Logging support operations. - [NTSB SEA82FYP11](https://openairdocs.org/ntsb/SEA82FYP11.md): Hiller UH-12-SOLOY · Kellogg, ID · Accident · Serious injuries · Final report · Sep 6, 1982 · N9035H · Substantial damage > The plt stated he had just released a load of logs & started his transition into forward flt when the eng failed. No usable fuel was on board. The plt stated the fuel gauge registered 50 pounds of fuel when the eng failed. A leak test of the fuel suction… - [NTSB LAX82DA306](https://openairdocs.org/ntsb/LAX82DA306.md): Hiller UH-12E · Chandler, AZ · Accident · No injuries · Final report · Aug 20, 1982 · N4026S · Substantial damage > The pilot was spraying liquid chemicals at night. The pilot flew into his own wake turbulence and lost control and collided with the ground. Control was regained to make an upright landing in the field. Skids were torn off the aircraft. - [NTSB CHI82DA301](https://openairdocs.org/ntsb/CHI82DA301.md): Hiller 12E · Palisade, MN · Accident · No injuries · Final report · Aug 10, 1982 · N5594N · Substantial damage > Aircraft lost power, pilot autorotated at 20 feet AGL. Made hard forced landing and aircraft rolled over. Piston rod failed because cap bolt was undertorqued. - [NTSB ATL82DA214](https://openairdocs.org/ntsb/ATL82DA214.md): Hiller UH-12E · Centre, AL · Accident · No injuries · Final report · Jul 13, 1982 · N28872 · Substantial damage > While returning from a spraying operation, the pilot was flying low toward the rising sun when the helicopter collided with power lines. An autorotation was initiated, but the skids collapsed during the landing. - [NTSB CHI82DA162](https://openairdocs.org/ntsb/CHI82DA162.md): Hiller 12E · Benson, MN · Accident · No injuries · Final report · May 12, 1982 · N4030C · Substantial damage > Helicopter flying at 250 feet to stay below clouds had engine failure. Landed downwind in muddy field. Right skid collapsed. - [NTSB LAX82DVA14](https://openairdocs.org/ntsb/LAX82DVA14.md): Hiller UH-12E · Chowchilla, CA · Accident · Serious injuries · Final report · Apr 15, 1982 · N67156 · Destroyed > The pilot was conducting an aerial dusting operation over a grape vineyard. While on a swath run, he gradually converged on a powerline that crossed the field at a slight angle from his flight path. As he proceeded on his swath run, the helicopter got closer… - [NTSB ATL82DA073](https://openairdocs.org/ntsb/ATL82DA073.md): Hiller UH12E · Lydia, SC · Accident · No injuries · Final report · Mar 17, 1982 · N4029R · Substantial damage > The pilot was applying liquid fertilizer on his last swath run prior to reloading when the engine stopped. A run-on landing was attempted during which the skids sank into the soft ground causing the helicopter to roll over. The field was level and covered… - [NTSB LAX82FVG10](https://openairdocs.org/ntsb/LAX82FVG10.md): Hiller Acft UH-12E · Angels Camp, CA · Accident · No injuries · Closed · Dec 10, 1981 · N93478 · Substantial damage - [NTSB SEA82DYM07](https://openairdocs.org/ntsb/SEA82DYM07.md): Hiller Acft UH-12E · Nashville, OR · Accident · No injuries · Closed · Dec 3, 1981 · N161HA · Substantial damage - [NTSB DEN81DTE08](https://openairdocs.org/ntsb/DEN81DTE08.md): Hiller UH12E · Craig, CO · Accident · No injuries · Closed · Nov 17, 1981 · N400AH · Substantial damage - [NTSB LAX81DJA01](https://openairdocs.org/ntsb/LAX81DJA01.md): Hiller Acft UH-12E · Kahului Maui, HI · Accident · No injuries · Closed · Oct 18, 1981 · N119HA · Substantial damage - [NTSB LAX81DUK03](https://openairdocs.org/ntsb/LAX81DUK03.md): Hiller Acft UH-12E · Gadsden, AZ · Accident · No injuries · Closed · Sep 20, 1981 · N62903 · Substantial damage - [NTSB LAX81FVD43](https://openairdocs.org/ntsb/LAX81FVD43.md): Hiller Acft UH-12E · Brentwood, CA · Accident · Minor injuries · Closed · Sep 8, 1981 · N62392 · Substantial damage Next page: https://openairdocs.org/ntsb.md?model=4360122&page=5 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```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."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 ``` This list as a web page: https://openairdocs.org/ntsb?model=4360122&page=4 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.