# Hiller UH-12D

- Type: Aircraft model (FAA registry)
- Registry code: 4360118
- Manufacturer (registry): HILLER
- Model: UH-12D
- Aircraft type: Rotorcraft
- Category: Rotorcraft
- Engines: 1 · Turbo-shaft
- Seats: 4
- Weight class: Up to 12,499 lb
- Cruise speed: 75 mph
- Certification: Type certificated
- Data sheet: [TCDS 4H10](https://openairdocs.org/tcds/4H10) (OpenAirDocs)
- Holder: Siam Hiller Holdings Inc.
- Registered aircraft: 22
- Page: https://openairdocs.org/model/hiller-uh-12d

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2015-20-51](https://openairdocs.org/ad/2015-20-51): Hiller UH-12, UH-12A, UH-12B and 6 more
- [AD 2000-24-21](https://openairdocs.org/ad/2000-24-21): Control System Linkage · Hiller UH-12, UH-12A, UH-12B and 6 more. Effective Jan 10, 2001
- [AD 97-20-15](https://openairdocs.org/ad/97-20-15): Outboard Tension-Torsion Bar Pin · Hiller UH-12A, UH-12B, UH-12C and 2 more. Effective Nov 12, 1997
- [AD 97-10-16](https://openairdocs.org/ad/97-10-16): Blade Spar Tube and Cuff Inspection · Allison 250-C20/250-C20B engine (Siam Hiller Holdings STC SH177WE or SH178WE). Effective Jun 27, 1997
- [AD 86-22-04](https://openairdocs.org/ad/86-22-04): Main Rotor Blades · Hiller UH-12D, UH-12E and UH-12E-L with STC SH177WE or SH178WE. Effective Nov 3, 1986
- [AD 86-17-02](https://openairdocs.org/ad/86-17-02): Main Rotor Blade Fork · Hiller UH-12D, UH-12E and UH-12E-L with STC SH177WE or SH178WE. Effective Aug 22, 1986
- [AD 84-19-08](https://openairdocs.org/ad/84-19-08): Engine Mount · Hiller UH-12D, UH-12E and UH-12E-L with STC SH177WE or SH178WE. Effective Sep 20, 1984
- [AD 83-25-02](https://openairdocs.org/ad/83-25-02): Main Rotor Blade Doublers · Allison 250-C20/250-C20B engine (Siam Hiller Holdings STC SH177WE). Effective Dec 29, 1983
- [AD 82-15-02](https://openairdocs.org/ad/82-15-02): Main And Tail Rotors · Hiller UH-12D, UH-12L, UH-12L4 and 2 more. Effective Jul 16, 1982
- [AD 81-18-02](https://openairdocs.org/ad/81-18-02): Tail Rotor Skin Cracks · Hiller UH-12, UH-12A, UH-12B and 6 more. Effective Sep 10, 1981
- [AD 81-17-03](https://openairdocs.org/ad/81-17-03): Main Transmission · Hiller UH-12, UH-12A, UH-12B and 6 more. Effective Aug 24, 1981
- [AD 81-17-01](https://openairdocs.org/ad/81-17-01): Starting Vibrator Assemblies · Bendix Starting Vibrator Assemblies, B-2, B-2A and 49 more. Effective Aug 13, 1981
- [AD 81-09-08](https://openairdocs.org/ad/81-09-08): Main Rotor Blade · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE. Effective Jun 25, 1981
- [AD 81-04-01](https://openairdocs.org/ad/81-04-01): Rudder Cable Assembly · Hiller UH-12D, UH-12L and UH-12E. Effective Feb 9, 1981
- [AD 80-23-02](https://openairdocs.org/ad/80-23-02): Turbine Power Conversions · Allison 250-C20/250-C20B engine (Siam Hiller Holdings STC SH177WE or 2 others). Effective Nov 20, 1980
- [AD 80-19-02](https://openairdocs.org/ad/80-19-02): Turbine Power - Soloy Conversions · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE. Effective Oct 11, 1980
- [AD 80-07-04](https://openairdocs.org/ad/80-07-04): Main Rotor Blade Anti-Node Bars · Hiller UH-12, UH-12D and UH-12E. Effective Mar 31, 1980
- [AD 79-03-07](https://openairdocs.org/ad/79-03-07): Main Rotor Tachometer Generator · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE. Effective Feb 21, 1979
- [AD 78-23-07](https://openairdocs.org/ad/78-23-07): Finite Life Components Listed in AD · Hiller UH-12D and UH-12E. Effective Dec 14, 1978
- [AD 78-22-08](https://openairdocs.org/ad/78-22-08): Flight/Engine Control · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE. Effective Nov 30, 1978
- [AD 78-22-02](https://openairdocs.org/ad/78-22-02): Rotor Blade Retention System · Hiller UH-12D and UH-12E. Effective Oct 27, 1978
- [AD 78-18-03](https://openairdocs.org/ad/78-18-03): Drive Shaft · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE. Effective Oct 6, 1978
- [AD 77-24-03](https://openairdocs.org/ad/77-24-03): Fuel Control Valve · Hiller UH-12C, UH-12D, UH-12L and 3 more. Effective Jan 6, 1978
- [AD 75-10-01](https://openairdocs.org/ad/75-10-01): Rotor Drive System · Hiller UH-12D, UH-12L, UH-12L4 and 2 more. Effective May 8, 1975
- [AD 61-05-04](https://openairdocs.org/ad/61-05-04): Main Transmission · Hiller UH-12D and UH-12E. Effective Jun 4, 1974
- [AD 74-04-03](https://openairdocs.org/ad/74-04-03): Main Rotor Drag Struts · Hiller UH-12D and UH-12E. Effective Feb 18, 1974
- [AD 73-25-03](https://openairdocs.org/ad/73-25-03): Finite Life Components · Hiller UH-12D. Effective Jan 10, 1974
- [AD 73-20-03](https://openairdocs.org/ad/73-20-03): Main Rotor Hub · Hiller UH-12, UH-12A, UH-12B and 4 more. Effective Oct 30, 1973
- [AD 71-25-08](https://openairdocs.org/ad/71-25-08): Inspect Main Rotor Blades · Hiller UH-12, UH-12A, UH-12B and 6 more. Effective Dec 14, 1971
- [AD 69-13-07](https://openairdocs.org/ad/69-13-07): Collective Yoke Support Brackets · Hiller UH-12D, UH-12L, UH-12L4 and 2 more. Effective Apr 30, 1970
- [AD 69-08-08](https://openairdocs.org/ad/69-08-08): Tail Rotor Yoke · Hiller UH-12D, UH-12L, UH-12L4 and 2 more. Effective Apr 23, 1969
- [AD 67-08-03](https://openairdocs.org/ad/67-08-03): Cyclic Control Bracket · Hiller UH-12D and UH-12E. Effective Mar 9, 1967
- [AD 66-22-04](https://openairdocs.org/ad/66-22-04): Mercury Clutches · Hiller UH-12D, UH-12L, UH-12L4 and 2 more. Effective Sep 2, 1966
- [AD 76-20-06](https://openairdocs.org/ad/76-20-06): Cable Freezing Control · Hiller UH-12D and UH-12E with STC SH177WE or SH178WE
- [AD 63-21-03](https://openairdocs.org/ad/63-21-03): Main Rotor Blades · Hiller UH-12D and UH-12E
- [AD 62-06-03](https://openairdocs.org/ad/62-06-03): Transmission & Lubrication System Modification · Hiller UH-12D and UH-12E
- [AD 59-25-03](https://openairdocs.org/ad/59-25-03): Wobble Plate Screws · Hiller UH-12, UH-12A, UH-12B and 3 more
- [AD 59-05-05](https://openairdocs.org/ad/59-05-05): Cyclic Control Scissor Casting · Hiller UH-12, UH-12A, UH-12B and 3 more
- [AD 58-02-03](https://openairdocs.org/ad/58-02-03): Carburetor Mixture Control Removal · Hiller UH-12, UH-12A, UH-12B and 2 more

Historical (superseded or no longer in force):

- [AD 77-07-05 R1](https://openairdocs.org/ad/77-07-05-R1) (historical): Control Rotor Blade Spar Tube and Cuff · Hiller UH-12, UH-12A, UH-12B and 3 more. Effective Jun 20, 1977
- [AD 77-07-05](https://openairdocs.org/ad/77-07-05) (historical): Control Rotor Blade Spar Tube and Cuff · Hiller UH-12, UH-12A, UH-12B and 3 more. Effective Jun 20, 1977

## Registered aircraft (22)

- [N105HH](https://openairdocs.org/aircraft/N105HH): [Haddock Flying Service Inc](https://openairdocs.org/faa-owner/HADDOCK%20FLYING%20SERVICE%20INC), [Salters, SC](https://openairdocs.org/faa-place/SC/Salters), S/N 1307
- [N106HH](https://openairdocs.org/aircraft/N106HH): [Haddock Flying Service Inc](https://openairdocs.org/faa-owner/HADDOCK%20FLYING%20SERVICE%20INC), [Salters, SC](https://openairdocs.org/faa-place/SC/Salters), S/N 1375
- [N11CU](https://openairdocs.org/aircraft/N11CU): [Pockrus Pat B](https://openairdocs.org/faa-owner/POCKRUS%20PAT%20B), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1957, S/N 983
- [N26PE](https://openairdocs.org/aircraft/N26PE): [Mshr Helicopter Service LLC](https://openairdocs.org/faa-owner/MSHR%20HELICOPTER%20SERVICE%20LLC), [Chehalis, WA](https://openairdocs.org/faa-place/WA/Chehalis), S/N 1327
- [N2770](https://openairdocs.org/aircraft/N2770): [Lil Dawg Aviation](https://openairdocs.org/faa-owner/LIL%20DAWG%20AVIATION), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), S/N 1250
- [N28801](https://openairdocs.org/aircraft/N28801): [Knutson Wayne R](https://openairdocs.org/faa-owner/KNUTSON%20WAYNE%20R), [Tioga, ND](https://openairdocs.org/faa-place/ND/Tioga), S/N 1218
- [N3269F](https://openairdocs.org/aircraft/N3269F): [Yellowjacket Aviation LLC](https://openairdocs.org/faa-owner/YELLOWJACKET%20AVIATION%20LLC), [Wenatchee, WA](https://openairdocs.org/faa-place/WA/Wenatchee), built 1976, S/N 1144
- [N374H](https://openairdocs.org/aircraft/N374H): [Dreyer Elwain C](https://openairdocs.org/faa-owner/DREYER%20ELWAIN%20C), [Cardington, OH](https://openairdocs.org/faa-place/OH/Cardington), S/N 1374
- [N47063](https://openairdocs.org/aircraft/N47063): [Geco Inc](https://openairdocs.org/faa-owner/GECO%20INC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1962, S/N 1422
- [N47077](https://openairdocs.org/aircraft/N47077): [Knutson Flying Service Inc](https://openairdocs.org/faa-owner/KNUTSON%20FLYING%20SERVICE%20INC), [Tioga, ND](https://openairdocs.org/faa-place/ND/Tioga), built 1957, S/N 947
- [N493BN](https://openairdocs.org/aircraft/N493BN): [Stimart Rene D Trustee](https://openairdocs.org/faa-owner/STIMART%20RENE%20D%20TRUSTEE), [Harshaw, WI](https://openairdocs.org/faa-place/WI/Harshaw), built 1962, S/N 1321
- [N58BA](https://openairdocs.org/aircraft/N58BA): [Bank Of Utah Trustee](https://openairdocs.org/faa-owner/BANK%20OF%20UTAH%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 1957, S/N 969
- [N62361](https://openairdocs.org/aircraft/N62361): [Horizon Helicopters LLC](https://openairdocs.org/faa-owner/HORIZON%20HELICOPTERS%20LLC), [Toms River, NJ](https://openairdocs.org/faa-place/NJ/Toms%20River), built 1975, S/N 1067
- [N62455](https://openairdocs.org/aircraft/N62455): [Fort Wolters Helicopter Inc](https://openairdocs.org/faa-owner/FORT%20WOLTERS%20HELICOPTER%20INC), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1962, S/N 1438
- [N686P](https://openairdocs.org/aircraft/N686P): [Simply Living LLC](https://openairdocs.org/faa-owner/SIMPLY%20LIVING%20LLC), [Fort Myers, FL](https://openairdocs.org/faa-place/FL/Fort%20Myers), S/N 592783
- [N689HS](https://openairdocs.org/aircraft/N689HS): [Texxon Resources Inc](https://openairdocs.org/faa-owner/TEXXON%20RESOURCES%20INC), [Winter Park, FL](https://openairdocs.org/faa-place/FL/Winter%20Park), built 1959, S/N 1169
- [N853BB](https://openairdocs.org/aircraft/N853BB): [Saile Daniel K](https://openairdocs.org/faa-owner/SAILE%20DANIEL%20K), [Skiatook, OK](https://openairdocs.org/faa-place/OK/Skiatook), built 1958, S/N 1147
- [N920HA](https://openairdocs.org/aircraft/N920HA): [Mshr Helicopter Service LLC](https://openairdocs.org/faa-owner/MSHR%20HELICOPTER%20SERVICE%20LLC), [Chehalis, WA](https://openairdocs.org/faa-place/WA/Chehalis), built 1962, S/N 1361
- [N9299Z](https://openairdocs.org/aircraft/N9299Z): [Bryant Jonathan E](https://openairdocs.org/faa-owner/BRYANT%20JONATHAN%20E), [Joaquin, TX](https://openairdocs.org/faa-place/TX/Joaquin), S/N 1150
- [N93456](https://openairdocs.org/aircraft/N93456): [Ward Mark P](https://openairdocs.org/faa-owner/WARD%20MARK%20P), [Wasilla, AK](https://openairdocs.org/faa-place/AK/Wasilla), built 1958, S/N 1062
- [N94515](https://openairdocs.org/aircraft/N94515): [Hiller Aircraft Corp](https://openairdocs.org/faa-owner/HILLER%20AIRCRAFT%20CORP), [Firebaugh, CA](https://openairdocs.org/faa-place/CA/Firebaugh), S/N 1172
- [N94AP](https://openairdocs.org/aircraft/N94AP): [Summit Helicopters Inc](https://openairdocs.org/faa-owner/SUMMIT%20HELICOPTERS%20INC), [Salem, VA](https://openairdocs.org/faa-place/VA/Salem), built 1959, S/N 1211

## NTSB investigations (50)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR20LA224](https://openairdocs.org/ntsb/WPR20LA224), Jul 17, 2020: Hiller UH 12D (N2297W), Mehama, OR, destroyed, 1 fatal. Probable cause: 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), Aug 23, 2016: Hiller UH 12D (N97TH), Cokeville, WY, substantial damage. Probable cause: Failure of the control rotor cuff due to fatigue.
- [NTSB WPR12LA347](https://openairdocs.org/ntsb/WPR12LA347), Aug 7, 2012: Hiller UH-12D (N47035), Deer Island, OR, substantial damage. Probable cause: 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…
- [NTSB CEN11CA231](https://openairdocs.org/ntsb/CEN11CA231), Mar 17, 2011: Hiller UH-12D (N11CU), Iowa, LA, substantial damage. Probable cause: 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), Sep 3, 2001: Hiller UH-12D (N2770), Lubbock, TX, substantial damage. Probable cause: 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), Oct 24, 1997: Hiller UH-12D (N62316), Farmingdale, NJ, substantial damage. Probable cause: The certificated flight instructor's inadequate supervision and failure to maintain directional control.
- [NTSB FTW95LA230](https://openairdocs.org/ntsb/FTW95LA230), Jun 4, 1995: Hiller UH-12E (N4254X), Checotah, OK, substantial damage. Probable cause: THE PILOT ALLOWING THE HELICOPTER TO TOUCHDOWN IMPROPERLY. A FACTOR WAS THE ERRATIC RUNNING ENGINE.
- [NTSB SEA94LA039](https://openairdocs.org/ntsb/SEA94LA039), Dec 7, 1993: Hiller-Soloy UH-12D (N2297W), Sublimity, OR, substantial damage. Probable cause: FUEL EXHAUSTION DUE TO INADEQUATE PREFLIGHT AND REFUELING NOT ACOMPLISHED.
- [NTSB SEA94LA037](https://openairdocs.org/ntsb/SEA94LA037), Nov 26, 1993: Hiller UH-12D (N59366), Sublimity, OR, substantial damage. Probable cause: 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), Jul 14, 1992: Hiller-Soloy UH12D (N62404), Loman, ID, substantial damage. Probable cause: 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), Aug 25, 1991: Hiller UH12D (N100HH), Sparks, NV, substantial damage. Probable cause: 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), Jul 2, 1991: Hiller UH-12D (N94515), Savoy, IL, substantial damage. Probable cause: 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), Mar 31, 1990: Hiller UH-12D (N94496), Soddy-Daisy, TN, substantial damage, 1 fatal. Probable cause: 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…
- [NTSB ATL90GA010](https://openairdocs.org/ntsb/ATL90GA010), Oct 23, 1989: Hiller UH-12D (N63LC), Mentor, OH, destroyed. Probable cause: 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), Apr 14, 1989: Hiller UH-12D (N14490), Bolinas, CA, substantial damage. Probable cause: 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…
- [NTSB SEA88LA150](https://openairdocs.org/ntsb/SEA88LA150), Aug 10, 1988: Hiller UH-12E (N62404), Leavenworth, WA, substantial damage
- [NTSB LAX88DUM04](https://openairdocs.org/ntsb/LAX88DUM04), Jul 9, 1988: Hiller UH-12D (N646JS), Winterhaven, CA, destroyed
- [NTSB LAX88DVG04](https://openairdocs.org/ntsb/LAX88DVG04), May 4, 1988: Hiller UH-12E (N62391), Winters, CA, destroyed
- [NTSB LAX88LA153](https://openairdocs.org/ntsb/LAX88LA153), Apr 4, 1988: Hiller UH-12D (N646JS), Bakersfield, CA, substantial damage
- [NTSB SEA87LA186](https://openairdocs.org/ntsb/SEA87LA186), Sep 12, 1987: Hiller UH-12E (N8QA), Quincy, WA, destroyed
- [NTSB ATL87FA147](https://openairdocs.org/ntsb/ATL87FA147), May 24, 1987: Hiller UH-12D (H23) (N6408), Spartanburg, SC, destroyed, 1 fatal
- [NTSB SEA86LA089](https://openairdocs.org/ntsb/SEA86LA089), Mar 30, 1986: Hiller 12E (N87595), Walla Walla, WA, destroyed
- [NTSB SEA86LA062](https://openairdocs.org/ntsb/SEA86LA062), Feb 21, 1986: Hiller UH-12E (N8542F), Odessa, WA, destroyed
- [NTSB FTW85LA135](https://openairdocs.org/ntsb/FTW85LA135), Mar 2, 1985: Hiller UH-12D (N26EW), Big Spring, TX, substantial damage
- [NTSB MKC83FA114](https://openairdocs.org/ntsb/MKC83FA114), May 24, 1983: Hiller UH-12E (N3GK), Troy, KS, destroyed
- [NTSB SEA82FYM11](https://openairdocs.org/ntsb/SEA82FYM11), Mar 8, 1982: Hiller UH-12E (N59366), Mount Angle, OR, destroyed
- [NTSB DEN81FTE51](https://openairdocs.org/ntsb/DEN81FTE51), Sep 8, 1981: Hiller UHI2D (N96107), Craig, CO, destroyed
- [NTSB CHI81FEK19](https://openairdocs.org/ntsb/CHI81FEK19), Jun 15, 1981: Hiller UH-12D (N96173), Junction City, OH, destroyed
- [NTSB SEA80DYM55](https://openairdocs.org/ntsb/SEA80DYM55), Aug 19, 1980: Hiller Acft UH-12E (N59366), Tillamook, OR, substantial damage
- [NTSB DEN80DTM36](https://openairdocs.org/ntsb/DEN80DTM36), Aug 8, 1980: Hiller Acft UH-12D (N31332), Coalville, UT, substantial damage
- [NTSB MIA80FA069](https://openairdocs.org/ntsb/MIA80FA069), Jun 15, 1980: Hiller UH-12D (N9299Z), Miami Beach, FL, substantial damage
- [NTSB FTW80DPJ20](https://openairdocs.org/ntsb/FTW80DPJ20), May 13, 1980: Hiller Acft HU-12D (N102BC), Norman, OK, substantial damage
- [NTSB MKC80FA035](https://openairdocs.org/ntsb/MKC80FA035), May 10, 1980: Hiller Acft UH-12D (N3269F), Kansas City, MO, destroyed
- [NTSB LAX80DVG30](https://openairdocs.org/ntsb/LAX80DVG30), Apr 24, 1980: Hiller UH-12J (N67042), Frks Of Salmn, CA, destroyed
- [NTSB SEA80FYM30](https://openairdocs.org/ntsb/SEA80FYM30), Apr 23, 1980: Hiller Acft UH-12D (N5589Q), Scappoose, OR, substantial damage
- [NTSB DEN80FTC05](https://openairdocs.org/ntsb/DEN80FTC05), Feb 8, 1980: Hiller Acft UH-12D (N31331), Mckennon, WY, substantial damage
- [NTSB SEA79AA029](https://openairdocs.org/ntsb/SEA79AA029), Apr 3, 1979: Hiller UH12D (N64867), Chehalis, WA, minor damage, 1 fatal
- [NTSB DEN79DQD03](https://openairdocs.org/ntsb/DEN79DQD03), Mar 22, 1979: Hiller UH-12D (N94AP), Tularosa, NM, substantial damage
- [NTSB MIA78DKT23](https://openairdocs.org/ntsb/MIA78DKT23), Dec 21, 1977: Hiller UH-12D (N501AG), Jupiter, FL, destroyed
- [NTSB MIA78DKT08](https://openairdocs.org/ntsb/MIA78DKT08), Oct 22, 1977: Hiller Acft UH-12D (N9299Z), Miami, FL, substantial damage
- [NTSB SEA77DYM18](https://openairdocs.org/ntsb/SEA77DYM18), Jan 27, 1977: Hiller Acft UH12D (N14490), Pendleton, OR, substantial damage
- [NTSB IAD77FLJ02](https://openairdocs.org/ntsb/IAD77FLJ02), Oct 12, 1976: Hiller UH-12D (N67089), Morrisville, NC, substantial damage
- [NTSB SEA76FYC70](https://openairdocs.org/ntsb/SEA76FYC70), Sep 20, 1976: Hiller Acft UH-12D (N62245), Carson, WA, substantial damage
- [NTSB ANC76AA123](https://openairdocs.org/ntsb/ANC76AA123), Aug 15, 1976: Hiller Acft UH12EJ (N47078), Sheep Mountain, AK, destroyed, 1 fatal
- [NTSB MKC76FCJ41](https://openairdocs.org/ntsb/MKC76FCJ41), Jun 16, 1976: Hiller Acft UH-12D (N87744), North Platte, NE, substantial damage
- [NTSB SEA76FYC26](https://openairdocs.org/ntsb/SEA76FYC26), Dec 11, 1975: Hiller Acft UH-12D (N17714), Nehalem, OR, destroyed
- [NTSB ANC76AA013](https://openairdocs.org/ntsb/ANC76AA013), Jul 28, 1975: Hiller Acft UH-12D (N87578), Nome, AK, substantial damage
- [NTSB SEA75DYC42](https://openairdocs.org/ntsb/SEA75DYC42), Jun 14, 1975: Hiller Acft UH-12D (N17714), Manzanita, OR, substantial damage
- [NTSB LAX75FYM34](https://openairdocs.org/ntsb/LAX75FYM34), Jun 12, 1975: Hiller Acft UH-12D (N96M), Paso Robles, CA, destroyed
- [NTSB MIA74DLD84](https://openairdocs.org/ntsb/MIA74DLD84), Apr 24, 1974: Hiller Acft UH-12D (N936), Pleasant Grov, FL, substantial damage

## FAA accident and incident reports (60, newest 50)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20200717012169A](https://openairdocs.org/incident/20200717012169A), Jul 17, 2020: Hiller UH-12D (N2297W), Mehama, OR, Destroyed, 1 fatal. Helicopter departed one field to relocate to next field for spraying. Witnesses report hearing engine pitch change and then heard helicopter impact the trees.…
- [Accident 20120807020729A](https://openairdocs.org/incident/20120807020729A), Aug 7, 2012: Hiller UH-12D (N47035), Deer Island, OR, Substantial damage. During a spry operation the pilot reported that at the start of an ag turn he felt a shudder. He easeied out of the turn and then heard a loud bang, he…
- [Accident 20110317009549A](https://openairdocs.org/incident/20110317009549A), Mar 17, 2011: Hiller UH-12D (N11CU), Iowa, LA, Substantial damage. It was determined the aircraft entered a dynamic roll over after hard contact with the landing surface occurred. It is believed, the aircraft was subjected to…
- [Accident 20010903024659A](https://openairdocs.org/incident/20010903024659A), Sep 3, 2001: Hiller UH12D (N2770), Lubbock, TX, Substantial damage. (-23) While spraying at 4 feet AGL, a vibration started then there was a pop with the loss of tail rotor thrust, as stated by the pilot. The pilot put the…
- [Incident 19980612025279I](https://openairdocs.org/incident/19980612025279I), Jun 12, 1998: Hiller UH12D (N2297W), St Paul, OR. Mr. Harchenko during spraying operations on 06-17-98 struck a powerline. Heindicated he had flown over the field prior to spraying, but missed this particular…
- [Accident 19971024047579A](https://openairdocs.org/incident/19971024047579A), Oct 24, 1997: Hiller UH12D (N62316), Farmingdale, NJ, Substantial damage. (-16) The accident occured while the student was in a three foot hover. The CFI simulated an engine failure by rolling back the throttle. The student did not…
- [Accident 19970109047629A](https://openairdocs.org/incident/19970109047629A), Jan 9, 1997: N68034, Bluebell, PA, Substantial damage. (-16) Flight instructor stalled aircraft while demonstrating soft field take-off.
- [Accident 19950604014509A](https://openairdocs.org/incident/19950604014509A), Jun 4, 1995: Hiller UH12E (N4254X), Checotah, OK, Substantial damage. Erratic engine surging on spray run. Caused yaw during attempted run on landing. Separated skids and tail rotor.
- [Accident 19931207046099A](https://openairdocs.org/incident/19931207046099A), Dec 7, 1993: Hiller UH12D (N2297W), Sublimity, OR, Substantial damage. Failed check fuel prior takeoff for tree hauling. Engine quit in 30 minutes. Drop load. Landed. Tanks were empty.
- [Accident 19931126049159A](https://openairdocs.org/incident/19931126049159A), Nov 26, 1993: Hiller UH12D (N59366), Sublimity, OR, Substantial damage. Lifting trees on long line struck wires. Had surveyed field prior but failed to see the wires.
- [Incident 19920729043869I](https://openairdocs.org/incident/19920729043869I), Jul 29, 1992: Hiller UH12D (N94515), Champaign-Urban, IL, Minor damage. While demonstrating an autorotation landing pilot landed hard. Minor damaged to tail rotor blades.
- [Accident 19920714025549A](https://openairdocs.org/incident/19920714025549A), Jul 14, 1992: Hiller UH12D (N62404), Loman, ID, Substantial damage. Ran out of fuel during external hoist log operation. Fuel quanity indicator was defective. Showed 20 gal empty.
- [Accident 19910824036649A](https://openairdocs.org/incident/19910824036649A), Aug 24, 1991: Hiller UH12D (N100HH), Sparks, NV, Substantial damage. Detected vibration. Autorotated to rough shale rock. Chopped tailboom. Bearing on tail rotor shaft heat damage.
- [Accident 19910702025679A](https://openairdocs.org/incident/19910702025679A), Jul 2, 1991: Hiller UH12D (N94515), Champaign-Urban, IL, Substantial damage. Practicing quick stop maneuver. Tail rotor hit ground. Lost directional control. Set down hard to avoid spin.
- [Accident 19900331007339A](https://openairdocs.org/incident/19900331007339A), Mar 31, 1990: Hiller UH12D (N94496), Soddy Daisy, TN, Substantial damage, 1 fatal. Collective pitch push rod broke. Unable to control rotor pitch crashed in trees. Unairworthy and poorly maintained.
- [Accident 19891029066509A](https://openairdocs.org/incident/19891029066509A), Oct 29, 1989: Hiller UH12D (N63LC), Mentor, OH, Destroyed. Felt vibration slowing to hover. Lost tail rotor effectiveness. Spiraled into trees. Burr on tailrotor pitch change
- [Accident 19890414009879A](https://openairdocs.org/incident/19890414009879A), Apr 14, 1989: Hiller UH12D (N14490), Bolinas, CA, Substantial damage. Ran out of fuel during external load operation. Autorotated to a hard landing that damaged the helicopter.
- [Accident 19880810032589A](https://openairdocs.org/incident/19880810032589A), Aug 10, 1988: Hiller UH12D (N62404), Leavenworth, WA, Substantial damage. Practicing autorotation approaches to a power hover. Held flare too long and tail rotor contacted terrain.
- [Accident 19880708026539A](https://openairdocs.org/incident/19880708026539A), Jul 8, 1988: Hiller UH12D (N646JS), Bakersfield, CA, Destroyed. Engine failure while crop dusting. Abrupt maneuver to avoid obstacles. Had loss of rotor RPM, crashed in field.
- [Accident 19880504012719A](https://openairdocs.org/incident/19880504012719A), May 4, 1988: Hiller UH12D (N62391), Winters, CA, Destroyed. Takeoff from a platform,helicopter failed to obtain transitional lift. Descended into wheat and rolled over.
- [Accident 19880404070959A](https://openairdocs.org/incident/19880404070959A), Apr 4, 1988: Hiller UH12D (N646JS), Bakersfield, CA, Substantial damage. Encountered IMC over mountains. Reversed course but overshot airport. Ran out of fuel. Hard autorotation landing.
- [Accident 19870911080449A](https://openairdocs.org/incident/19870911080449A), Sep 11, 1987: Hiller UH12D (N8QA), Quincy, WA, Destroyed. Struck a powerline and crashed during aerial ag applications manuever.
- [Incident 19870824068479I](https://openairdocs.org/incident/19870824068479I), Aug 24, 1987: Hiller UH12D (N493BN), Osseo, WI. Helicopter struck an electrical wire during spray operation. No damage.
- [Accident 19870524015509A](https://openairdocs.org/incident/19870524015509A), May 24, 1987: Hiller UH12D (N6408), Spartanburg, SC, Destroyed, 1 fatal. The helicopter lost power and struck trees during the forced landing. Cause of power failure could not be determined
- [Accident 19860329037559A](https://openairdocs.org/incident/19860329037559A), Mar 29, 1986: Hiller UH12D (N87595), Walla Walla, WA, Destroyed. Transmission planetary gear failed. Hit ground tail low on turn back to landing sight. Destroyed by fire.
- [Accident 19860221022979A](https://openairdocs.org/incident/19860221022979A), Feb 21, 1986: Hiller UH12D (N8542F), Odessa, WA, Destroyed. Forward motion was stopped due to jammed pulley on external load. Unable to release load. Impacted the ground.
- [Incident 19851105064379I](https://openairdocs.org/incident/19851105064379I), Nov 5, 1985: Hiller UH12D (N58BA), North Bend, OR, Minor damage. On liftoff, an empty seed sack stored under a truck blew into the tail rotor. Skid knocked off on aborted takeoff.
- [Accident 19850302005559A](https://openairdocs.org/incident/19850302005559A), Mar 2, 1985: Hiller UH12D (N26EW), Big Springs, TX, Substantial damage. Aircraft rolled over during downwind run on autorotative landing demonstration. Right skid broke on touchdown.
- [Accident 19830524020749A](https://openairdocs.org/incident/19830524020749A), May 24, 1983: Hiller UH12D (N3GK), Troy, KS, Destroyed. Struck wires making a scouting low pass over a field to be sprayed. Dived into ground and burned.
- [Accident 19820308002999A](https://openairdocs.org/incident/19820308002999A), Mar 8, 1982: Hiller UH12E (N59366), Mount Angel, OR, Substantial damage. Main rotors struck a pickup truck as the pilot was landing to check out sling load operation.
- [Accident 19810908057009A](https://openairdocs.org/incident/19810908057009A), Sep 8, 1981: Hiller UH12D (N96107), Craig, CO, Destroyed. Pilot practicing pinacle landing hit hard and broke tail rotor causing loss of directional control.
- [Accident 19810615032559A](https://openairdocs.org/incident/19810615032559A), Jun 15, 1981: Hiller UH12D (N96173), Junction City, OH, Destroyed. Engine quit en route. Made hard autorotation landing. Fuel taks were empty.
- [Incident 19810317018909I](https://openairdocs.org/incident/19810317018909I), Mar 17, 1981: Hiller UH12D (N62470), Mcfarland, CA, Minor damage. Helicopter landed on road to repair spray equipment. Repairs made then foreman walked into tail rotor.
- [Incident 19801110087039I](https://openairdocs.org/incident/19801110087039I), Nov 10, 1980: Hiller UH12D (N5589Q), Logsden, OR, Minor damage. Za forced landing after engine failed. Found broken gear case.
- [Incident 19801018075189I](https://openairdocs.org/incident/19801018075189I), Oct 18, 1980: Hiller UH12D (N94515), Champaign, IL, Minor damage. Za pilot demonstrating autorotation with power recovery. Tail rotor struck the ground.
- [Accident 19800819040989A](https://openairdocs.org/incident/19800819040989A), Aug 19, 1980: Hiller UH12D (N59366), Tillamook, OR, Substantial damage. Tried to lift helicopter off flat bed in a vertical takeoff. Rear skid not intied. Helicopter rolled over.
- [Accident 19800808034539A](https://openairdocs.org/incident/19800808034539A), Aug 8, 1980: Hiller UH12D (N31332), Coalville, UT, Substantial damage, 1 fatal. Tried to take off near gross in high density altitude & gusty wind. Could not get translational lift. Struck trees.
- [Accident 19800615045749A](https://openairdocs.org/incident/19800615045749A), Jun 15, 1980: Hiller UH12D (N9299Z), Miami Beach, FL, Substantial damage. Helicopter crashed during emergency landing in water after transmission failure.
- [Accident 19800513015759A](https://openairdocs.org/incident/19800513015759A), May 13, 1980: Hiller UH12D (N102BC), Norman, OK, Substantial damage. Made hard, tail-low landing after suspected mast bump on takeoff. Hit tail low. Impact sheared tail rotor.
- [Accident 19800510012499A](https://openairdocs.org/incident/19800510012499A), May 10, 1980: Hiller UH12D (N3269F), Kansas City, MO, Destroyed. Helicopter howering in gusty wind at low altitude. Drifted & lost lift. Hit trees. Factors; wind & rotor RPM decay.
- [Accident 19800424010429A](https://openairdocs.org/incident/19800424010429A), Apr 24, 1980: Hiller UH12D (N67042), Forks Of Salmon, CA, Destroyed. Made takeoff with trailing land line which caught on a horizontal cable. Main rotor severed tail rotor, crashlanded
- [Accident 19800423010569A](https://openairdocs.org/incident/19800423010569A), Apr 23, 1980: Hiller UH12D (N5589Q), Scappoose, OR, Substantial damage. Claims helicopter began nose high altitude and moving rearward without control. Response made hard landing.
- [Accident 19800208002479A](https://openairdocs.org/incident/19800208002479A), Feb 8, 1980: Hiller UH12D (N31331), Mckinnon, WY, Substantial damage. Pilot reported throttle froze wide open. Made hard landing. Helicopter had snow and ice on surface at departure.
- [Incident 19790803029959I](https://openairdocs.org/incident/19790803029959I), Aug 3, 1979: Hiller UH12D (N94496), Council Bluffs, IA, Minor damage. During simulated autorotation instructor took over controls with insufficient altitude to recover. Damage to skids.
- [Accident 19790403006379A](https://openairdocs.org/incident/19790403006379A), Apr 3, 1979: Hiller UH12D (N64867), Chehalia, WA, Minor damage, 1 fatal. Bolt missing in collective control. Mechanic passenger reached out the door to try to fix the problem, fell out.
- [Accident 19790322005069A](https://openairdocs.org/incident/19790322005069A), Mar 22, 1979: Hiller UH12D (N94AP), Tularosa, NM, Destroyed. Helicopter struck a wire while spraying a field, lost control, and crashed.
- [Accident 19781019042189A](https://openairdocs.org/incident/19781019042189A), Oct 19, 1978: Hiller UH12C (N64867), AK, Substantial damage
- [Incident 19780904017739I](https://openairdocs.org/incident/19780904017739I), Sep 4, 1978: Hiller UH12D (N67087), White Sulpher S, WV, Minor damage. Forced landing after power loss. Helicopter had been serviced with jet fuel.
- [Accident 19771221042149A](https://openairdocs.org/incident/19771221042149A), Dec 21, 1977: Hiller UH12D (N501AG), Jupiter, FL, Substantial damage. Wreckage not recovered following ditching,pilot did not use carb heat.
- [Accident 19771022039549A](https://openairdocs.org/incident/19771022039549A), Oct 22, 1977: Hiller UH12D (N9299Z), Miami, FL, Substantial damage. Circling boats which appeared to have run aground.

All 60: https://openairdocs.org/model/hiller-uh-12d/incidents.md

## Service difficulty reports (4)

As reported by operators and repair stations, by the model named in the report.

- [SDR 2015FA0000446](https://openairdocs.org/sdr/2015FA0000446), Sep 8, 2015: FORK. CRACKED. THE ACFT WAS PERFORMING AERIAL APPLICATION UNDER RESTRICTED CATEGORY. PRIOR TO 9/8/2015, THE PILOT REPORTED THE ACFT FLEW SMOOTH. PILOT REPORTED THAT THE LAST F
- [SDR CA051212002](https://openairdocs.org/sdr/CA051212002), Aug 14, 2005: BLADE. FAILED. A SEVERE VERT VIBRATION OCCURRED WHEN HELICOPTER ENTERED A SPRAY RUN. VIBRATION CEASED JUST BEFORE LANDING ON A NEARBY ROAD. ROTOR HEAD WAS REMOVED AND NDT'D FO
- [SDR 97ZZZX1674](https://openairdocs.org/sdr/97ZZZX1674), Feb 13, 1997: CONTROL LINK. BOLT DETACHED. WHILE IN-FLIGHT, 2-13-97 APPROX 4 PM, ATTACHMENT BOLT VIBRATED OUT OF THE UPPER END OF THE COLLECTIVE CONTROL ROD. A LEATHER PUNCH WAS INSERTED IN THE CLEVIS AN
- [SDR 96ZZZX3237](https://openairdocs.org/sdr/96ZZZX3237), Apr 30, 1996: HUB. CRACKED. WHILE C/W AD 73-20-03 10/30/73, DYE PEN AND VISUAL INSPECTION OF M/R HUB, A CRACK WAS FOUND ABOUT .75 INCHES LONG. M/R HUB WAS REMOVED AND SCRAPPED AND A SERVIC

## STCs that may be installed (OpenAirDocs) (41)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SH3319NM](https://openairdocs.org/stc/SH3319NM): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc
- [STC SR02704SE](https://openairdocs.org/stc/SR02704SE): Installation and maintenance of the Sunspot 36 and 46 series lights. AeroLED's Holdings LLC
- [STC SR00359BO](https://openairdocs.org/stc/SR00359BO): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies
- [STC SR00420NY](https://openairdocs.org/stc/SR00420NY): Installation of Airwolf remote mounted engine oil filter Model AFC-600. Airwolf Filter, Corp
- [STC SR02487AK](https://openairdocs.org/stc/SR02487AK): Installation of L-3 Communications Avionics Systems ESI-500 Standby Instrument System. ADS-B Technologies, LLC
- [STC SR02470AK](https://openairdocs.org/stc/SR02470AK): Installation of the L-3 Communications NGT -1000/2000/2500 ADS-B System. ADS-B Technologies, LLC
- [STC SR02471AK](https://openairdocs.org/stc/SR02471AK): Installation of the L-3 Communications NGT -9000/9000R ADS-B System. ADS-B Technologies, LLC
- [STC SR02394AK](https://openairdocs.org/stc/SR02394AK): Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system. Seaplanes North LLC
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc
- [STC SA02033AT](https://openairdocs.org/stc/SA02033AT): Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line. M-20 Oil Separators LLC
- [STC SH247NW](https://openairdocs.org/stc/SH247NW): Installation and maintenance of exhaust ejector engine oil cooler system. (UH-12D (ARMY UH-23D modified per STC SH177WE). Siam Hiller Holdings Inc
- [STC SH295NW](https://openairdocs.org/stc/SH295NW): Installation of Hiller auxiliary fuel tanks kit No 72041. (UH-12D (ARMY UH-23D) modified per STC SH177WE). Siam Hiller Holdings Inc
- [STC SH297NW](https://openairdocs.org/stc/SH297NW): Installation and maintenance of a cabin heater system. (UH-12D (ARMY UH-23D modified per STC SH178WE). Siam Hiller Holdings Inc
- [STC SH299NW](https://openairdocs.org/stc/SH299NW): Installation of Soloy cargo racks. Siam Hiller Holdings Inc
- [STC SH321NW](https://openairdocs.org/stc/SH321NW): Installation of a Bendix fuel control/power governor system on the Allison 250-C20 turbine powered Hiller UH-12D rotorcraft. (UH-12D (ARMY UH-23D) modified per STC SH177WE). Siam Hiller Holdings Inc
- [STC SH338NW](https://openairdocs.org/stc/SH338NW): Installation of transmission oil cooling system on the Allison250-C20 turbine powered Hiller UH-12D rotorcraft. (UH-12D (ARMY UH-23D modified per STC SH177WE). Siam Hiller Holdings Inc
- [STC SH380NW](https://openairdocs.org/stc/SH380NW): Installation and maintenance of engine auto reignition system. (UH-12D (ARMY UH-23D) modified per STC SH177WE). Siam Hiller Holdings Inc
- [STC SH505NW](https://openairdocs.org/stc/SH505NW): Installation of cargo release pedal. Siam Hiller Holdings Inc
- [STC SH559NW](https://openairdocs.org/stc/SH559NW): Installation and maintenance of engine inlet air cleaner system. (UH-12D (ARMY UH-23D) modified per STC SH177WE). Siam Hiller Holdings Inc
- [STC SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer. Electronics International
- [STC SH177WE](https://openairdocs.org/stc/SH177WE): Installation of Allison 250-C20/250-C20B engine and related changes. Siam Hiller Holdings Inc
- [STC SH287NW](https://openairdocs.org/stc/SH287NW): Installation of Hiller landing gear float kit No. 44012. (UH-12d (ARMY UH-23D modified per STC SH177WE). Siam Hiller Holdings Inc
- [STC SH475NW](https://openairdocs.org/stc/SH475NW): Installation of an agricultural spray system. (UH-12D (ARMY UH-23D) modifier per STC). Siam Hiller Holdings Inc
- [STC SR01430LA](https://openairdocs.org/stc/SR01430LA): Installation of Stainless Steel Skid shoes. Papas Gary Los Angeles Laboratories Inc
- [STC SA01258SE](https://openairdocs.org/stc/SA01258SE): Installation of the Automatic Flagman Dispenser Models in accordance with Automatic Flagman Master Drawing Lists specified in attached AML, or later FAA approved revision.This STC supercedes several existing STC s as listed in the notes on the attached AML. R-S Sales Inc
- [STC SA02520AT](https://openairdocs.org/stc/SA02520AT): Installation of M-20 Oil Separator, model 600-WP. M-20 Oil Separators LLC
- [STC SH849NW](https://openairdocs.org/stc/SH849NW): Installation of North American Industries, Inc., Model No. 5 Automatic Flagman. R-S Sales Inc
- [STC SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches. Aero Manufacturing Inc
- [STC SR00135LA](https://openairdocs.org/stc/SR00135LA): Installation of Yehnert Tail Rotor Blades YH-278 as replacements for Hiller Tail Rotor Blades 55073. Yehnert Helicopters, Inc
- [STC SA1626NM PAGE 1](https://openairdocs.org/stc/SA1626NM%20PAGE%201): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International
- [STC SA2350NM PAGE 1](https://openairdocs.org/stc/SA2350NM%20PAGE%201): Installation of Electronics International Inc digital carburetor/outside air temperature gauges. Electronics International
- [STC SH359GL](https://openairdocs.org/stc/SH359GL): Installation of Facet Enterprises engine lubrication system scavenge filter. Facet Filter Products
- [STC SH2763SO](https://openairdocs.org/stc/SH2763SO): Installation of control rotor safety cable. JAARS Inc
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International
- [STC SA3862NM PAGE 1](https://openairdocs.org/stc/SA3862NM%20PAGE%201): Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories. Electronics International
- [STC SH3362NM](https://openairdocs.org/stc/SH3362NM): Installation of a Tail Rotor Blade Protective Coating. Columbia Helicopters Inc
- [STC SA2190NM PAGE 1](https://openairdocs.org/stc/SA2190NM%20PAGE%201): Installation of electronics International Digital Volt/Amp Gauges and Accessories. Electronics International
- [STC SH618NW](https://openairdocs.org/stc/SH618NW): Installation of the Onboard Weighing System Adapter No. 1500, for use with Eastern Rotorcraft Cargo Hook No 2A15E. Onboard Weighing Systems
- [STC SH877SO](https://openairdocs.org/stc/SH877SO): Installation of tail rotor guard assembly. Jungle Aviation & Radio Service, Inc
- [STC SA2350NM](https://openairdocs.org/stc/SA2350NM) (historical): Installation of Electronics International Inc digital carburetor/outside air temperature gauges listed on the attached continuation sheet and the associated accessories. Electronics International

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Hiller-Osborn UH-12D](https://openairdocs.org/model/hiller-osborn-uh-12d): 2 registered aircraft, registry code 4361501
- [Hiller-Northern UH-12D](https://openairdocs.org/model/hiller-northern-uh-12d): 0 registered aircraft, registry code 4361301
- [Hiller-Houska UH-12D](https://openairdocs.org/model/hiller-houska-uh-12d): 0 registered aircraft, registry code 4361601
- [Rogerson Hiller UH-12D](https://openairdocs.org/model/rogerson-hiller-uh-12d): 0 registered aircraft, registry code 4365001

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