# NTSB investigations: Hiller UH-12D

A list on [Hiller UH-12D](https://openairdocs.org/model/hiller-uh-12d.md).

Matched to the registry by N-number and event date, newest first.

- [NTSB WPR20LA224](https://openairdocs.org/ntsb/WPR20LA224.md): Hiller UH 12D · Mehama, OR · Accident · 1 fatal · Class 3 · Limited · Final report · Jul 17, 2020 · N2297W · Destroyed
  > An in-flight separation of a tail rotor blade due to fatigue cracking and overstress, which resulted in a loss of directional control and subsequent ground impact.
- [NTSB CEN16LA330](https://openairdocs.org/ntsb/CEN16LA330.md): Hiller UH 12D · Cokeville, WY · Accident · Minor injuries · Limited investigation · Final report · Aug 23, 2016 · N97TH · Substantial damage
  > Failure of the control rotor cuff due to fatigue.
- [NTSB WPR12LA347](https://openairdocs.org/ntsb/WPR12LA347.md): Hiller UH-12D · Deer Island, OR · Accident · Minor injuries · Limited investigation · Final report · Aug 7, 2012 · N47035 · Substantial damage
  > A loss of helicopter control while maneuvering at low altitude for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB CEN11CA231](https://openairdocs.org/ntsb/CEN11CA231.md): Hiller UH-12D · Iowa, LA · Accident · No injuries · Data collection · Final report · Mar 17, 2011 · N11CU · Substantial damage
  > The pilot's inadequate compensation for gusty crosswinds during takeoff, which resulted in a loss of directional control.
- [NTSB FTW01LA202](https://openairdocs.org/ntsb/FTW01LA202.md): Hiller UH-12D · Lubbock, TX · Accident · Minor injuries · Limited investigation · Final report · Sep 3, 2001 · N2770 · Substantial damage
  > the failure of the tail rotor drive shaft hanger bearing, which resulted in the separation of the tail rotor drive shaft. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB NYC98LA023](https://openairdocs.org/ntsb/NYC98LA023.md): Hiller UH-12D · Farmingdale, NJ · Accident · No injuries · Limited investigation · Final report · Oct 24, 1997 · N62316 · Substantial damage
  > The certificated flight instructor's inadequate supervision and failure to maintain directional control.
- [NTSB FTW95LA230](https://openairdocs.org/ntsb/FTW95LA230.md): Hiller UH-12E · Checotah, OK · Accident · Minor injuries · Limited investigation · Final report · Jun 4, 1995 · N4254X · Substantial damage
  > The pilot allowing the helicopter to touchdown improperly. A factor was the erratic running engine.
- [NTSB SEA94LA039](https://openairdocs.org/ntsb/SEA94LA039.md): Hiller-Soloy UH-12D · Sublimity, OR · Accident · No injuries · Limited investigation · Final report · Dec 7, 1993 · N2297W · Substantial damage
  > Fuel exhaustion due to inadequate preflight and refueling not acomplished.
- [NTSB SEA94LA037](https://openairdocs.org/ntsb/SEA94LA037.md): Hiller UH-12D · Sublimity, OR · Accident · No injuries · Limited investigation · Final report · Nov 26, 1993 · N59366 · Substantial damage
  > The pilot's failure to maintain clearance from unmarked transmission wires. Factors include the pilot's inadequate visual lookout, and unmarked wires in the area of operation.
- [NTSB SEA92LA152](https://openairdocs.org/ntsb/SEA92LA152.md): Hiller-Soloy UH12D · Loman, ID · Accident · Minor injuries · Limited investigation · Final report · Jul 14, 1992 · N62404 · Substantial damage
  > Fuel exhaustion. Factors include a short in the fuel quantity sensor/transmitter, an inadequate preflight, and a tree covered landing area.
- [NTSB LAX91LA369](https://openairdocs.org/ntsb/LAX91LA369.md): Hiller UH12D · Sparks, NV · Accident · No injuries · Limited investigation · Final report · Aug 25, 1991 · N100HH · Substantial damage
  > The encounter with rough, unsuitable terrain during a precautionary landing. Contributing to the accident was the pilot's decision to make an autorotation after encountering an airframe vibration.
- [NTSB CHI91LA205](https://openairdocs.org/ntsb/CHI91LA205.md): Hiller UH-12D · Savoy, IL · Accident · No injuries · Limited investigation · Final report · Jul 2, 1991 · N94515 · Substantial damage
  > The pilot's failure to maintain tail rotor clearance from the ground. A related factor is the pilot's lack of total experience in helicopters.
- [NTSB ATL90FA089](https://openairdocs.org/ntsb/ATL90FA089.md): Hiller UH-12D · Soddy-Daisy, TN · Accident · 1 fatal · Field investigation · Final report · Mar 31, 1990 · N94496 · Substantial damage
  > Fatigue induced failure of the collective pitch push rod (adjustable) during flight, and the failure of the pilot to provide routine maintenance. The pilot's lack of expereince and his failure to obtain required training and certification were factors in the…
- [NTSB ATL90GA010](https://openairdocs.org/ntsb/ATL90GA010.md): Hiller UH-12D · Mentor, OH · Accident · Serious injuries · Final report · Oct 23, 1989 · N63LC · Destroyed
  > Improper in-flight planning/decision by the pilot. Factors related to the accident were: the pilot's improper compensation for wind conditions and trees.
- [NTSB LAX89LA169](https://openairdocs.org/ntsb/LAX89LA169.md): Hiller UH-12D · Bolinas, CA · Accident · No injuries · Limited investigation · Final report · Apr 14, 1989 · N14490 · Substantial damage
  > The pilot's poor preflight planning in that he did not accurately account for the fuel on board the aircraft as a basis for fuel consumption calculations thereby causing the engine to stop producing power because of a lack of fuel. Contributing to the…
- [NTSB SEA88LA150](https://openairdocs.org/ntsb/SEA88LA150.md): Hiller UH-12E · Leavenworth, WA · Accident · No injuries · Limited investigation · Final report · Aug 10, 1988 · N62404 · Substantial damage
  > The PIC reported that during a practice helicopter autorotation to a power recovery, the pilot under instruction held the flare too long. The helicopter's tail guard and tail rotor struck the ground and the aircraft began to spin. The PIC reduced the throttle…
- [NTSB LAX88DUM04](https://openairdocs.org/ntsb/LAX88DUM04.md): Hiller UH-12D · Winterhaven, CA · Accident · Minor injuries · Final report · Jul 9, 1988 · N646JS · Destroyed
- [NTSB LAX88DVG04](https://openairdocs.org/ntsb/LAX88DVG04.md): Hiller UH-12E · Winters, CA · Accident · No injuries · Final report · May 4, 1988 · N62391 · Destroyed
  > The pilot was taking off from a loading truck for his 16th aerial application. He reduced the load from 90 to 70 gals because the winds had become variable. The helicopter descended into ground effect where it normally attains translational lift. The…
- [NTSB LAX88LA153](https://openairdocs.org/ntsb/LAX88LA153.md): Hiller UH-12D · Bakersfield, CA · Accident · No injuries · Limited investigation · Final report · Apr 4, 1988 · N646JS · Substantial damage
  > The helicopter encountered weather while enroute to its dest and diverted to an alternate arpt. It overflew the alternate and, after the engine failed from fuel exhaustion, crashed during an autorotative forced landing.
- [NTSB SEA87LA186](https://openairdocs.org/ntsb/SEA87LA186.md): Hiller UH-12E · Quincy, WA · Accident · Serious injuries · Limited investigation · Final report · Sep 12, 1987 · N8QA · Destroyed
  > During an aerial application maneuver the pilot flew into two 23,000 volt powerlines. The helicopter's rotor blades struck the powerlines, the aircraft turned to the right and descended to the ground.
- [NTSB ATL87FA147](https://openairdocs.org/ntsb/ATL87FA147.md): Hiller UH-12D (H23) · Spartanburg, SC · Accident · 1 fatal · Field investigation · Final report · May 24, 1987 · N6408 · Destroyed
  > During a local pleasure flight above the treetops, the passenger reported that they heard a loud 'pop' over the sound of the engine. The plt told her that they were going down and she noticed the main rotor blades began to turn slower than usual before the…
- [NTSB SEA86LA089](https://openairdocs.org/ntsb/SEA86LA089.md): Hiller 12E · Walla Walla, WA · Accident · No injuries · Limited investigation · Final report · Mar 30, 1986 · N87595 · Destroyed
  > A catastrophic failure of the planetary gear of the transmission occurred about 51 flight hours after overhaul. During forced landing a hard landing occurred severing the tail boom. A fire then erupted.
- [NTSB SEA86LA062](https://openairdocs.org/ntsb/SEA86LA062.md): Hiller UH-12E · Odessa, WA · Accident · No injuries · Limited investigation · Final report · Feb 21, 1986 · N8542F · Destroyed
  > During an external load operation to remove groundwire off crossarms, the cable splice jammed in the pulley frame. The helicopters forward motion stopped and it then struck the ground. The pilot said the cargo hook release didn't work but no failures were…
- [NTSB FTW85LA135](https://openairdocs.org/ntsb/FTW85LA135.md): Hiller UH-12D · Big Spring, TX · Accident · No injuries · Limited investigation · Final report · Mar 2, 1985 · N26EW · Substantial damage
  > CFI was demonstrating a simulated eng failure with tailwind of 10 KTS, 20 KTS grnd speed. The acft yawed left and touchdown was made with 10 kt grnd speed. The right skid broke off and the acft rolled over. The maneuver was initiated at 4 ft skid height.
- [NTSB MKC83FA114](https://openairdocs.org/ntsb/MKC83FA114.md): Hiller UH-12E · Troy, KS · Accident · Serious injuries · Field investigation · Final report · May 24, 1983 · N3GK · Destroyed
  > The acft collided with a powerline while the pilot was locating a field to spray at a later date. The pilot saw telephone lines and flew over them but hit the powerlines which were 20 feet higher. The skids caught the wires and the helicopter nosed down,…
- [NTSB SEA82FYM11](https://openairdocs.org/ntsb/SEA82FYM11.md): Hiller UH-12E · Mount Angle, OR · Accident · Minor injuries · Final report · Mar 8, 1982 · N59366 · Destroyed
  > The aircraft was being used on an external load operation. On his fourth load, the pilot was to transport a 1190 lb electric pump and fan from the back of a pickup truck. While preparing to lift the load, the pilot was not satisfied with its position. He…
- [NTSB DEN81FTE51](https://openairdocs.org/ntsb/DEN81FTE51.md): Hiller UHI2D · Craig, CO · Accident · No injuries · Closed · Sep 8, 1981 · N96107 · Destroyed
- [NTSB CHI81FEK19](https://openairdocs.org/ntsb/CHI81FEK19.md): Hiller UH-12D · Junction City, OH · Accident · No injuries · Closed · Jun 15, 1981 · N96173 · Destroyed
- [NTSB SEA80DYM55](https://openairdocs.org/ntsb/SEA80DYM55.md): Hiller Acft UH-12E · Tillamook, OR · Accident · No injuries · Closed · Aug 19, 1980 · N59366 · Substantial damage
- [NTSB DEN80DTM36](https://openairdocs.org/ntsb/DEN80DTM36.md): Hiller Acft UH-12D · Coalville, UT · Accident · Serious injuries · Closed · Aug 8, 1980 · N31332 · Substantial damage
- [NTSB MIA80FA069](https://openairdocs.org/ntsb/MIA80FA069.md): Hiller UH-12D · Miami Beach, FL · Accident · Serious injuries · Closed · Jun 15, 1980 · N9299Z · Substantial damage
- [NTSB FTW80DPJ20](https://openairdocs.org/ntsb/FTW80DPJ20.md): Hiller Acft HU-12D · Norman, OK · Accident · No injuries · Closed · May 13, 1980 · N102BC · Substantial damage
- [NTSB MKC80FA035](https://openairdocs.org/ntsb/MKC80FA035.md): Hiller Acft UH-12D · Kansas City, MO · Accident · Serious injuries · Closed · May 10, 1980 · N3269F · Destroyed
- [NTSB LAX80DVG30](https://openairdocs.org/ntsb/LAX80DVG30.md): Hiller UH-12J · Frks Of Salmn, CA · Accident · Minor injuries · Closed · Apr 24, 1980 · N67042 · Destroyed
- [NTSB SEA80FYM30](https://openairdocs.org/ntsb/SEA80FYM30.md): Hiller Acft UH-12D · Scappoose, OR · Accident · No injuries · Closed · Apr 23, 1980 · N5589Q · Substantial damage
- [NTSB DEN80FTC05](https://openairdocs.org/ntsb/DEN80FTC05.md): Hiller Acft UH-12D · Mckennon, WY · Accident · No injuries · Closed · Feb 8, 1980 · N31331 · Substantial damage
- [NTSB SEA79AA029](https://openairdocs.org/ntsb/SEA79AA029.md): Hiller UH12D · Chehalis, WA · Accident · 1 fatal · Closed · Apr 3, 1979 · N64867 · Minor damage
- [NTSB DEN79DQD03](https://openairdocs.org/ntsb/DEN79DQD03.md): Hiller UH-12D · Tularosa, NM · Accident · Minor injuries · Closed · Mar 22, 1979 · N94AP · Substantial damage
- [NTSB MIA78DKT23](https://openairdocs.org/ntsb/MIA78DKT23.md): Hiller UH-12D · Jupiter, FL · Accident · No injuries · Closed · Dec 21, 1977 · N501AG · Destroyed
- [NTSB MIA78DKT08](https://openairdocs.org/ntsb/MIA78DKT08.md): Hiller Acft UH-12D · Miami, FL · Accident · No injuries · Closed · Oct 22, 1977 · N9299Z · Substantial damage
- [NTSB SEA77DYM18](https://openairdocs.org/ntsb/SEA77DYM18.md): Hiller Acft UH12D · Pendleton, OR · Accident · No injuries · Closed · Jan 27, 1977 · N14490 · Substantial damage
- [NTSB IAD77FLJ02](https://openairdocs.org/ntsb/IAD77FLJ02.md): Hiller UH-12D · Morrisville, NC · Accident · No injuries · Closed · Oct 12, 1976 · N67089 · Substantial damage
- [NTSB SEA76FYC70](https://openairdocs.org/ntsb/SEA76FYC70.md): Hiller Acft UH-12D · Carson, WA · Accident · No injuries · Closed · Sep 20, 1976 · N62245 · Substantial damage
- [NTSB ANC76AA123](https://openairdocs.org/ntsb/ANC76AA123.md): Hiller Acft UH12EJ · Sheep Mountain, AK · Accident · 1 fatal · Closed · Aug 15, 1976 · N47078 · Destroyed
- [NTSB MKC76FCJ41](https://openairdocs.org/ntsb/MKC76FCJ41.md): Hiller Acft UH-12D · North Platte, NE · Accident · Minor injuries · Closed · Jun 16, 1976 · N87744 · Substantial damage
- [NTSB SEA76FYC26](https://openairdocs.org/ntsb/SEA76FYC26.md): Hiller Acft UH-12D · Nehalem, OR · Accident · Minor injuries · Closed · Dec 11, 1975 · N17714 · Destroyed
- [NTSB ANC76AA013](https://openairdocs.org/ntsb/ANC76AA013.md): Hiller Acft UH-12D · Nome, AK · Accident · Minor injuries · Closed · Jul 28, 1975 · N87578 · Substantial damage
- [NTSB SEA75DYC42](https://openairdocs.org/ntsb/SEA75DYC42.md): Hiller Acft UH-12D · Manzanita, OR · Accident · No injuries · Closed · Jun 14, 1975 · N17714 · Substantial damage
- [NTSB LAX75FYM34](https://openairdocs.org/ntsb/LAX75FYM34.md): Hiller Acft UH-12D · Paso Robles, CA · Accident · Serious injuries · Closed · Jun 12, 1975 · N96M · Destroyed
- [NTSB MIA74DLD84](https://openairdocs.org/ntsb/MIA74DLD84.md): Hiller Acft UH-12D · Pleasant Grov, FL · Accident · No injuries · Closed · Apr 24, 1974 · N936 · Substantial damage

## 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_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = a.case_mkey
WHERE a.aircraft_model_code IN ('4360118')
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/model/hiller-uh-12d/ntsb

---
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.