# Hiller UH-12C - Type: Aircraft model (FAA registry) - Registry code: 4360116 - Manufacturer (registry): HILLER - Model: UH-12C - Aircraft type: Rotorcraft - Category: Rotorcraft - Engines: 1 · Reciprocating - Seats: 4 - Weight class: Up to 12,499 lb - Cruise speed: 63 mph - Certification: Type certificated - Data sheet: [TCDS 6H2](https://openairdocs.org/tcds/6H2) (OpenAirDocs) - Holder: Siam Hiller Holdings Inc. - Registered aircraft: 31 - Page: https://openairdocs.org/model/hiller-uh-12c 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 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023 - [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 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 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 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 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 63-04-02](https://openairdocs.org/ad/63-04-02): Tail Rotor Blade · Hiller UH-12, UH-12A, UH-12B and 1 more. Effective Feb 12, 1963 - [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 - [AD 56-09-01](https://openairdocs.org/ad/56-09-01): Tail Rotor Torsion Bar · Hiller UH-12, UH-12A, UH-12B and 1 more Historical (superseded or no longer in force): - [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021 - [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 (31) - [N103JA](https://openairdocs.org/aircraft/N103JA): [Joann Air Inc](https://openairdocs.org/faa-owner/JOANN%20AIR%20INC), [Mulberry, FL](https://openairdocs.org/faa-place/FL/Mulberry), S/N 782 - [N10728](https://openairdocs.org/aircraft/N10728): [Henricks C John](https://openairdocs.org/faa-owner/HENRICKS%20C%20JOHN), [Lebanon, OR](https://openairdocs.org/faa-place/OR/Lebanon), built 1956, S/N 798 - [N112BK](https://openairdocs.org/aircraft/N112BK): [Fordyce Joel M](https://openairdocs.org/faa-owner/FORDYCE%20JOEL%20M), [Gaston, OR](https://openairdocs.org/faa-place/OR/Gaston), built 1957, S/N 862 - [N1348P](https://openairdocs.org/aircraft/N1348P): [Carey James D](https://openairdocs.org/faa-owner/CAREY%20JAMES%20D), [Winterset, IA](https://openairdocs.org/faa-place/IA/Winterset), S/N 892 - [N1348X](https://openairdocs.org/aircraft/N1348X): [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 901 - [N1348Z](https://openairdocs.org/aircraft/N1348Z): [Pockrus Pat B](https://openairdocs.org/faa-owner/POCKRUS%20PAT%20B), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1958, S/N 1043 - [N156PT](https://openairdocs.org/aircraft/N156PT): [Wiger Theodore L](https://openairdocs.org/faa-owner/WIGER%20THEODORE%20L), [Falcon Heights, MN](https://openairdocs.org/faa-place/MN/Falcon%20Heights), built 1956, S/N 851 - [N17MQ](https://openairdocs.org/aircraft/N17MQ): [Pan Bar Aviation Inc](https://openairdocs.org/faa-owner/PAN%20BAR%20AVIATION%20INC), [Pittsburgh, PA](https://openairdocs.org/faa-place/PA/Pittsburgh), S/N 787 - [N222TE](https://openairdocs.org/aircraft/N222TE): [Franke Darren](https://openairdocs.org/faa-owner/FRANKE%20DARREN), [Yorktown, TX](https://openairdocs.org/faa-place/TX/Yorktown), built 1955, S/N 802 - [N239SB](https://openairdocs.org/aircraft/N239SB): [Cottage Grove, OR](https://openairdocs.org/faa-place/OR/Cottage%20Grove), built 1956, S/N 800, Sale reported, pending cancellation - [N26US](https://openairdocs.org/aircraft/N26US): [Plane Fun Inc Tr Trustee](https://openairdocs.org/faa-owner/PLANE%20FUN%20INC%20TR%20TRUSTEE), [Snellville, GA](https://openairdocs.org/faa-place/GA/Snellville), built 1957, S/N 823 - [N38767](https://openairdocs.org/aircraft/N38767): [Pockrus Pat B](https://openairdocs.org/faa-owner/POCKRUS%20PAT%20B), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), S/N 1037 - [N469DW](https://openairdocs.org/aircraft/N469DW): [Bishop Thomas W](https://openairdocs.org/faa-owner/BISHOP%20THOMAS%20W), [Decatur, TX](https://openairdocs.org/faa-place/TX/Decatur), built 1956, S/N 869 - [N49983](https://openairdocs.org/aircraft/N49983): [Pockrus Pat B](https://openairdocs.org/faa-owner/POCKRUS%20PAT%20B), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), S/N 850 - [N5315V](https://openairdocs.org/aircraft/N5315V): [Southern Aircraft Consultancy Inc Trustee](https://openairdocs.org/faa-owner/SOUTHERN%20AIRCRAFT%20CONSULTANCY%20INC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1956, S/N 757 - [N5317V](https://openairdocs.org/aircraft/N5317V): [International Air Services Inc Trustee](https://openairdocs.org/faa-owner/INTERNATIONAL%20AIR%20SERVICES%20INC%20TRUSTEE), [Carson City, NV](https://openairdocs.org/faa-place/NV/Carson%20City), built 1956, S/N 768 - [N5320V](https://openairdocs.org/aircraft/N5320V): [Albertson James M](https://openairdocs.org/faa-owner/ALBERTSON%20JAMES%20M), [Slocomb, AL](https://openairdocs.org/faa-place/AL/Slocomb), built 1956, S/N 786 - [N5321V](https://openairdocs.org/aircraft/N5321V): [Gates Steven](https://openairdocs.org/faa-owner/GATES%20STEVEN), [Midlothian, TX](https://openairdocs.org/faa-place/TX/Midlothian), built 1956, S/N 822 - [N5326V](https://openairdocs.org/aircraft/N5326V): [Jstream Lc](https://openairdocs.org/faa-owner/JSTREAM%20LC), [Sheridan, WY](https://openairdocs.org/faa-place/WY/Sheridan), built 1956, S/N 865 - [N5330V](https://openairdocs.org/aircraft/N5330V): [Miami Helicopter Services Corp](https://openairdocs.org/faa-owner/MIAMI%20HELICOPTER%20SERVICES%20CORP), [Miami, FL](https://openairdocs.org/faa-place/FL/Miami), built 1959, S/N 1042 - [N54594](https://openairdocs.org/aircraft/N54594): [Wagner Leslie P](https://openairdocs.org/faa-owner/WAGNER%20LESLIE%20P), [Indian Lake, NY](https://openairdocs.org/faa-place/NY/Indian%20Lake), S/N 873 - [N57CD](https://openairdocs.org/aircraft/N57CD): [Carey James Dean](https://openairdocs.org/faa-owner/CAREY%20JAMES%20DEAN), [Winterset, IA](https://openairdocs.org/faa-place/IA/Winterset), built 1957, S/N 878 - [N57FD](https://openairdocs.org/aircraft/N57FD): [Fort Wolters Helicopter Inc](https://openairdocs.org/faa-owner/FORT%20WOLTERS%20HELICOPTER%20INC), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), S/N 817 - [N57PD](https://openairdocs.org/aircraft/N57PD): [J R Trucking & Rigging Inc](https://openairdocs.org/faa-owner/J%20R%20TRUCKING%20%26%20RIGGING%20INC), [Pottsville, PA](https://openairdocs.org/faa-place/PA/Pottsville), built 1956, S/N 763 - [N780C](https://openairdocs.org/aircraft/N780C): [Housken George E](https://openairdocs.org/faa-owner/HOUSKEN%20GEORGE%20E), [Gardnerville, NV](https://openairdocs.org/faa-place/NV/Gardnerville), built 1956, S/N 780 - [N783TT](https://openairdocs.org/aircraft/N783TT): [Spengler Raymond Frances Jr](https://openairdocs.org/faa-owner/SPENGLER%20RAYMOND%20FRANCES%20JR), [Longview, TX](https://openairdocs.org/faa-place/TX/Longview), built 1956, S/N 783 - [N9010Q](https://openairdocs.org/aircraft/N9010Q): [Yearwood John F](https://openairdocs.org/faa-owner/YEARWOOD%20JOHN%20F), [Georgetown, TX](https://openairdocs.org/faa-place/TX/Georgetown), built 1955, S/N 804 - [N90724](https://openairdocs.org/aircraft/N90724): [Marsh Thomas R](https://openairdocs.org/faa-owner/MARSH%20THOMAS%20R), [Washington, DC](https://openairdocs.org/faa-place/DC/Washington), S/N 810 - [N9734C](https://openairdocs.org/aircraft/N9734C): [Hillsboro Capital Inc](https://openairdocs.org/faa-owner/HILLSBORO%20CAPITAL%20INC), [Hillsboro, TN](https://openairdocs.org/faa-place/TN/Hillsboro), built 1956, S/N 840 - [N9739C](https://openairdocs.org/aircraft/N9739C): [Mullins Michael](https://openairdocs.org/faa-owner/MULLINS%20MICHAEL), [Seaford, DE](https://openairdocs.org/faa-place/DE/Seaford), built 1956, S/N 847 - [N9774C](https://openairdocs.org/aircraft/N9774C): [Northwest Skydiving Instruction LLC](https://openairdocs.org/faa-owner/NORTHWEST%20SKYDIVING%20INSTRUCTION%20LLC), [Kennewick, WA](https://openairdocs.org/faa-place/WA/Kennewick), built 1958, S/N 902 ## NTSB investigations (39) 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 MIA07LA089](https://openairdocs.org/ntsb/MIA07LA089), Apr 27, 2007: Hiller UH-12C (N92993), Plant City, FL, substantial damage. Probable cause: The loss of engine power due to a magneto impulse coupling failure for undetermined reasons. - [NTSB MIA00LA145](https://openairdocs.org/ntsb/MIA00LA145), May 6, 2000: Hiller UH-12C (N80584), Metter, GA, substantial damage. Probable cause: the pilot's failure to maintain an adequate lookout resulting in a collision with a transmission wire that resulted in a forced landing and substantial damage to the helicopter. - [NTSB ATL99LA108](https://openairdocs.org/ntsb/ATL99LA108), Jul 16, 1999: Hiller UH12-C (N5317V), Venice, FL, substantial damage. Probable cause: Loss of engine power due to fuel starvation as a result of the passenger inadvertently shutting off the fuel supply. - [NTSB NYC99LA146](https://openairdocs.org/ntsb/NYC99LA146), Jun 16, 1999: Hiller UH-12C (N57CR), Delphos, OH, substantial damage. Probable cause: A blocked fuel line, from an unknown object, that resulted in fuel starvation, and total loss of engine power. A factor in the accident was the pilot's failure to maintain rotor rpm during the… - [NTSB CHI99LA012](https://openairdocs.org/ntsb/CHI99LA012), Oct 24, 1998: Hiller UH-12C (N9739C), Clinton, IA, substantial damage. Probable cause: the failure of the 90 degree gearbox for reasons undetermined. Factors were the failure of the gearbox, and it not being possible for the pilot to maintain control of the aircraft. - [NTSB NYC98LA006](https://openairdocs.org/ntsb/NYC98LA006), Oct 5, 1997: Hiller UH-12C (N49983), Bennington, VT, substantial damage. Probable cause: The failure of the cyclic control due to an improper modification by the pilot/owner. - [NTSB LAX95LA326](https://openairdocs.org/ntsb/LAX95LA326), Sep 6, 1995: Hiller UH-12C (N1348Z), Porterville, CA, substantial damage. Probable cause: the flight instructor's inadequate supervision of the flight; the dual student's improper use of the flight controls; and improper remedial action. - [NTSB LAX95LA238](https://openairdocs.org/ntsb/LAX95LA238), Jul 3, 1995: Hiller UH-12C (N1348Z), Rio Vista, CA, substantial damage. Probable cause: The result of a chafing failure of the left anti-torque control cable while the aircraft was in flight. An inadequate preflight inspection by the pilot-in-command, and an inadequate 100-hour… - [NTSB SEA95LA063](https://openairdocs.org/ntsb/SEA95LA063), Mar 7, 1995: Hiller UH-12C (N222TE), Bonners Ferry, ID, substantial damage. Probable cause: ROTOR RPM WAS NOT MAINTAINED. FACTORS TO THE ACCIDENT WERE: INADEQUATE IN FLIGHT PLANNING/DECISION AND SUITABLE TERRAIN WAS NOT AVAILABLE. - [NTSB SEA95LA022](https://openairdocs.org/ntsb/SEA95LA022), Nov 28, 1994: Hiller UH-12C (N54594), Twisp, WA, substantial damage. Probable cause: AN UNEXPLAINED LOSS OF POWER AND THE STUDENT PILOT'S DELAYED APPLICATION OF COLLECTIVE DURING THE LANDING FLARE. - [NTSB MIA93LA032](https://openairdocs.org/ntsb/MIA93LA032), Dec 21, 1992: Hiller UH-12C (N38767), New Smyrna Bch, FL, substantial damage. Probable cause: THE PILOT-IN-COMMAND'S IMPROPER APPLICATION OF CYCLIC AND COLLECTIVE PITCH CONTROL DURING AN AUTOROTATIVE LANDING. - [NTSB MKC89LA016](https://openairdocs.org/ntsb/MKC89LA016), Oct 26, 1988: Hiller UH-12C (N57FD), Davenport, IA, substantial damage - [NTSB ANC86LA058](https://openairdocs.org/ntsb/ANC86LA058), May 18, 1986: Hiller 12-C (N49983), Palmer, AK, substantial damage - [NTSB LAX85LA249](https://openairdocs.org/ntsb/LAX85LA249), May 9, 1985: Hiller 12-C (N38767), Casa Grande, AZ, substantial damage - [NTSB MIA84FA058](https://openairdocs.org/ntsb/MIA84FA058), Jan 12, 1984: Hiller UH-12C (N5317V), San Juan, PR, no damage, 1 fatal - [NTSB FTW84LA099](https://openairdocs.org/ntsb/FTW84LA099), Dec 16, 1983: Hiller UH-12C (N63MC), Imperial, TX, substantial damage - [NTSB DEN83LA007](https://openairdocs.org/ntsb/DEN83LA007), Oct 12, 1982: Hiller UH-12C (N5316V), Blanding, UT, destroyed - [NTSB FTW81FPD31](https://openairdocs.org/ntsb/FTW81FPD31), Jul 15, 1981: Hiller Acft UH-12C (N57CR), Burleson, TX, substantial damage - [NTSB NYC78FHM27](https://openairdocs.org/ntsb/NYC78FHM27), Aug 29, 1978: Hiller 12C (N63MC), Neptune, NJ, substantial damage - [NTSB SEA77FYE24](https://openairdocs.org/ntsb/SEA77FYE24), Jun 17, 1977: Hiller Acft 12C (N5330V), Mt Vernon, WA, destroyed - [NTSB DEN76FTE32](https://openairdocs.org/ntsb/DEN76FTE32), Oct 19, 1975: Hiller Acft UH-12C (N5316V), Nucla, CO, substantial damage - [NTSB OAK74FVD14](https://openairdocs.org/ntsb/OAK74FVD14), Sep 14, 1973: Hiller Acft UH-12C (N5330V), Brentwood, CA, substantial damage - [NTSB OAK74DVM02](https://openairdocs.org/ntsb/OAK74DVM02), Jul 13, 1973: Hiller Acft UH-12C (N5320V), Gonzalez, CA, substantial damage - [NTSB OAK73FVM40](https://openairdocs.org/ntsb/OAK73FVM40), Jun 28, 1973: Hiller Acft UH-12C (N9734C), Salinas, CA, destroyed - [NTSB FTW73DPD34](https://openairdocs.org/ntsb/FTW73DPD34), May 14, 1973: Hiller Acft UH-12C (N5328V), Justin, TX, destroyed - [NTSB FTW73DPD17](https://openairdocs.org/ntsb/FTW73DPD17), Dec 23, 1972: Hiller Acft UH-12C (N5328V), Valley View, TX, substantial damage - [NTSB OAK73FVD14](https://openairdocs.org/ntsb/OAK73FVD14), Sep 12, 1972: Hiller Acft UH-12C (N9734C), Brentwood, CA, minor damage, 1 fatal - [NTSB FTW72DPD09](https://openairdocs.org/ntsb/FTW72DPD09), Sep 5, 1971: Hiller UH12C (N5328V), Roanoke, TX, substantial damage - [NTSB OAK71DVA46](https://openairdocs.org/ntsb/OAK71DVA46), Dec 16, 1970: Hiller Acft UH-12C (N5315V), Fresno, CA, substantial damage - [NTSB OAK71DVM12](https://openairdocs.org/ntsb/OAK71DVM12), Aug 28, 1970: Hiller Acft UH-12C (N5330V), Castroville, CA, substantial damage - [NTSB OAK70DVM09](https://openairdocs.org/ntsb/OAK70DVM09), Mar 17, 1970: Hiller Acft UH-12C (N5320V), Castroville, CA, destroyed - [NTSB ANC69A0052](https://openairdocs.org/ntsb/ANC69A0052), May 5, 1969: Hiller UH-12C (N5330V), Livengood, AK, substantial damage - [NTSB MIA69F0470](https://openairdocs.org/ntsb/MIA69F0470), Apr 19, 1969: Hiller UH-12C (N5317V), Hato Rey, PR, substantial damage - [NTSB LAX69D0317](https://openairdocs.org/ntsb/LAX69D0317), Feb 13, 1969: Hiller UH-12C (N5326V), Compton, CA, substantial damage - [NTSB OAK68A0036](https://openairdocs.org/ntsb/OAK68A0036), Oct 15, 1967: Hiller UH-12C (N5321V), Riverdale, CA, substantial damage - [NTSB SEA67A0042](https://openairdocs.org/ntsb/SEA67A0042), Dec 12, 1966: Hiller UH-12C (N5316V), Rosalia, WA, substantial damage - [NTSB MIA65A0099](https://openairdocs.org/ntsb/MIA65A0099), Apr 7, 1965: Hiller UH12C (N5317V), N Miami Beach, FL, substantial damage - [NTSB UNK64X2135](https://openairdocs.org/ntsb/UNK64X2135), Jun 5, 1964: Hiller UH12C (N5326V), San Bernardino, CA, substantial damage - [NTSB UNK64X0705](https://openairdocs.org/ntsb/UNK64X0705), Feb 27, 1964: Hiller UH12C (N5315V), Chatsworth, CA, substantial damage ## FAA accident and incident reports (31) 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 20070427012289A](https://openairdocs.org/incident/20070427012289A), Apr 27, 2007: Hiller UH12C (N92993), Plant City, FL, Substantial damage. (-23) On April 27, 2007, about 1330 eastern time, a Hiller UH-12C helicopter, operating on a part 91 instruction flight made a forced landing in a field… - [Accident 20000506008839A](https://openairdocs.org/incident/20000506008839A), May 6, 2000: Hiller UH12 (N80584), Metter, GA, No damage. (-23) Pilot was too low and struck power lines, with heli. - [Accident 19990716009169A](https://openairdocs.org/incident/19990716009169A), Jul 16, 1999: Hiller UH12C (N5317V), Venice, FL, Substantial damage. Power failure in flight. Aircraft soft landed in gulf of Mexico.(.19) on July 16, 1999, at 0812 eastern daylight time, a Hiller UH12-C, N5317V, ditched into… - [Accident 19990616007139A](https://openairdocs.org/incident/19990616007139A), Jun 16, 1999: Hiller UH12C (N57CR), Delphos, OH, Destroyed. 1956 Hiller-world helicopters UH-12C helicopter lost power, and the pilot auto-rotated the acft, the main rotor flexed on landing and severed the tail of the… - [Accident 19981024040399A](https://openairdocs.org/incident/19981024040399A), Oct 24, 1998: Hiller UH12C (N9739C), Clinton, IA, Substantial damage. (-23) While in cruise flight, the pilot was unable to maintain altitude and heading. An emergency landing was initiated which resulted in loss of control… - [Accident 19971005047449A](https://openairdocs.org/incident/19971005047449A), Oct 5, 1997: Hiller UH12C (N49983), Bennington, VT, Substantial damage. (-16) Instructor was demonstrating hovering to student near runway at the airport (5B5). Student pilot at the controls began drifting aircraft to the right.… - [Accident 19950906027929A](https://openairdocs.org/incident/19950906027929A), Sep 6, 1995: Hiller UH12C (N1348Z), Porterville, CA, Substantial damage. Drifted backwards after liftoff. Lifted collective. Rotor RPM lost. CFI attempted recovery too late. Hard impact. - [Accident 19950703016069A](https://openairdocs.org/incident/19950703016069A), Jul 3, 1995: Hiller UH12C (N1348Z), Rio Vista, CA, Substantial damage. Low rotor RPM demo. Aircraft began uncommanded turn. Landed hard, bounced. Left antitorque cable broke due wear. - [Accident 19950307003299A](https://openairdocs.org/incident/19950307003299A), Mar 7, 1995: Hiller UH12C (N222TE), Bonners Ferry, ID, Substantial damage. Practicing pinnicle approach hover. Transition to forward flight lost RPM. Lost tail control. Landed hard. Rolled. - [Accident 19941128039569A](https://openairdocs.org/incident/19941128039569A), Nov 28, 1994: Hiller UH12C (N54594), Twisp, WA, Substantial damage. Failed to timely flare from practice autorotation. Impacted hard. Main rotors chopped tailboom. - [Incident 19930301007279I](https://openairdocs.org/incident/19930301007279I), Mar 1, 1993: Hiller UH12C (N222TE), Spokane, WA, Minor damage. Aircraft began to vibrate at hover. Lost control authority. Landed. Left lower engine snubber assembly failed. - [Accident 19921221052829A](https://openairdocs.org/incident/19921221052829A), Dec 21, 1992: Hiller UH12C (N38767), New Smyrna Beac, FL, Substantial damage. Tail rotor struck ground during a demo autorotation with power recovery. Tail rotor separated. - [Incident 19910218013589I](https://openairdocs.org/incident/19910218013589I), Feb 18, 1991: Hiller UH12C (N49983), Pittsfield, MA, Minor damage. Throttle frozen engine entered into overspeed condition. Autoratated into field. Made a hard landing. - [Incident 19890714045549I](https://openairdocs.org/incident/19890714045549I), Jul 14, 1989: Hiller UH12B (N5321V), Norwalk, OH, Minor damage. Lost engine power on approach. Autorotated to ground. Accessory case was broken and oil drained out. - [Accident 19881026048299A](https://openairdocs.org/incident/19881026048299A), Oct 26, 1988: Hiller UH12C (N57FD), Davenport, IA, Substantial damage. Main rotors chopped off tailboom on a simulated autorotation landing. Pilot blamed soft ground. - [Incident 19880602031919I](https://openairdocs.org/incident/19880602031919I), Jun 2, 1988: Hiller UH12C (N5320V), Colts Neck, NJ, Substantial damage. Severe vibration inflight. Main rotor failed, tail rotor mssing and bubble destroyed. Either in air or landing. - [Accident 19860518018569A](https://openairdocs.org/incident/19860518018569A), May 18, 1986: Hiller UH12C (N49983), Palmer, AK, Substantial damage. Allowed rotor RPM to decay while hovering at low altitude looking for a landing area. Rotors struck shoreline rocks. - [Accident 19850509016289A](https://openairdocs.org/incident/19850509016289A), May 9, 1985: Hiller UH12C (N38767), Casa Grande, AZ, Substantial damage. During ground slide following practice autorotation left forward crossover tube failed. Rotor blade struck tail. - [Accident 19840112028009A](https://openairdocs.org/incident/19840112028009A), Jan 12, 1984: Hiller UH12C (N5317V), San Juan, Puerto Rico, 1 fatal. Trapeze performer lost his grip on a rope sling below the helicopter and fell to the ground. No form 337 for sling. - [Accident 19831216061559A](https://openairdocs.org/incident/19831216061559A), Dec 16, 1983: Hiller UH12C (N63MC), Imperial, TX, Substantial damage. Experienced a shudder in cruise flight. Elected to land. Tail boom hit ground, then chopped off by main rotor. - [Accident 19821012052159A](https://openairdocs.org/incident/19821012052159A), Oct 12, 1982: Hiller UH12C (N5316V), Blanding, UT, Destroyed. Engine quit during hovering at 50 feet altitude. Insufficient altitude for autorotation. - [Accident 19810715042299A](https://openairdocs.org/incident/19810715042299A), Jul 15, 1981: Hiller UH12C (N57CR), Burleson, TX, Substantial damage. Engine lost power after liftoff. Aborted. Helicopter rolled on impact. Fouled igniter. Engine gave prior warning. - [Incident 19790713020699I](https://openairdocs.org/incident/19790713020699I), Jul 13, 1979: Hiller UH12C (N61MC), Duquoin, IL, Minor damage. After climbing to 40 feet RPM started to decay. Landed short of helipad and tail struck ground. - [Incident 19781020029159I](https://openairdocs.org/incident/19781020029159I), Oct 20, 1978: Hiller UH12C (N9739C), Carbondale, IL, Minor damage. Student delayed in leveling after a practice autorotation. Tail rotor struck the ground. - [Accident 19780829029349A](https://openairdocs.org/incident/19780829029349A), Aug 29, 1978: Hiller UH12C (N63MC), Neptune, NJ, Substantial damage. Ip did not slow high rate of descent in time to prevent hard land - [Accident 19770617031139A](https://openairdocs.org/incident/19770617031139A), Jun 17, 1977: Hiller UH12C (N5330V), Mt Vernon, WA, Substantial damage. L mag-p lead gndd. R mag-oil lkg past seal into brkr assy. Dnwind autorotation. - [Accident 19751020036019A](https://openairdocs.org/incident/19751020036019A), Oct 20, 1975: Hiller UH12C (N5316V), Nucla, CO, Substantial damage. Rust particles in fuel sump. Small amount of water in carb. No water found in fuel service system. - [Accident 19730914030259A](https://openairdocs.org/incident/19730914030259A), Sep 14, 1973: Hiller UH12C (N5330V), Brentwood, CA, Substantial damage. Eng fail too low to affect recovery. - [Accident 19730713021639A](https://openairdocs.org/incident/19730713021639A), Jul 13, 1973: Hiller UH12C (N5320V), Gonzalez, CA, Substantial damage. Reduced vsby. After seeing wires atmtd to underfly,skids struck ground. - [Accident 19730628018469A](https://openairdocs.org/incident/19730628018469A), Jun 28, 1973: Hiller UH12C (N9734C), Salinas, CA, Destroyed. MN rotor hub assembly,p/n 51437-7,fractured thru counter balance studs. - [Accident 19730514011379A](https://openairdocs.org/incident/19730514011379A), May 14, 1973: Hiller UH12C (N5328V), Justin, TX, Destroyed. Plt was sprayng 6FT above crops. Drg instrument scan,moved cyclic stick fwd acft dscndd into crop. ## STCs that may be installed (OpenAirDocs) (31) 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 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 SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer. Electronics International - [STC SA02520AT](https://openairdocs.org/stc/SA02520AT): Installation of M-20 Oil Separator, model 600-WP. M-20 Oil Separators LLC - [STC SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches. Aero Manufacturing 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 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 SA2190NM PAGE 1](https://openairdocs.org/stc/SA2190NM%20PAGE%201): Installation of electronics International Digital Volt/Amp Gauges and Accessories. Electronics International - [STC SA1351WE](https://openairdocs.org/stc/SA1351WE): Replace existing fabric on wings, fuselage, empennage, and/or control surfaces, with Ceconite101 material. (262A Series -12). Ceconite Inc - [STC SH959NW](https://openairdocs.org/stc/SH959NW): Remobe battery from Sta 126 and install it on the original radio rack at Sta 25. Clover Park Vocational/Technical Institute - [STC SH954NW](https://openairdocs.org/stc/SH954NW): Remove battery from Sta 126 and install it on the original radio ract at Sta 25. Clover Park Vocational/Technical Institute - [STC SH141GL](https://openairdocs.org/stc/SH141GL): Installation of Bell 47 canopy and one piece doors. Stanley Tool & Die Co - [STC SH446EA](https://openairdocs.org/stc/SH446EA): Installation of Franklin engine Model 6V-350B in Fairchild Hiller UH-12A helicopter. Franklin Engine Co Inc. Lists UH-12 Series - [STC SH82WE](https://openairdocs.org/stc/SH82WE): Installation of spray system and extended landing gear. Wayne Clevenger - [STC SH83WE](https://openairdocs.org/stc/SH83WE): Installation of modified air induction system. Wayne Clevenger - [STC SH80WE](https://openairdocs.org/stc/SH80WE): Installation of Simplex thirty-two foot spray boom. Simplex Manufacturing Co. Lists UH-12 Series - [STC SH1-457](https://openairdocs.org/stc/SH1-457): Aircooler Motors 6VS-335B turbo-supercharged engine (derated). Carson Helicopters Inc. Lists UH-12 Series - [STC SH160AL](https://openairdocs.org/stc/SH160AL): Airborne control survey system. US Dept of Interior. Lists UH-12 Series - [STC SH4-178](https://openairdocs.org/stc/SH4-178): Curved control stick. Nystrom Aviation Inc. Lists UH-12 Series - [STC SH52WE](https://openairdocs.org/stc/SH52WE): High volume fifty foot spray boom kit. Simplex Manufacturing Co. Lists UH-12 Series - [STC SH77AL](https://openairdocs.org/stc/SH77AL): Tundra snow shoes. ERA Helicopters Inc. Lists UH-12 Series - [STC SH9AL](https://openairdocs.org/stc/SH9AL): Airglas tundra pads L-100. Intl Helicopters. Lists UH-12 Series - [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 - World Helicopters UH-12C](https://openairdocs.org/model/hiller-world-helicopters-uh-12c): 2 registered aircraft, registry code 4360117 - [Hiller-Stanley UH-12C](https://openairdocs.org/model/hiller-stanley-uh-12c): 1 registered aircraft, registry code 4360105 - [Hiller-Felt UH-12C](https://openairdocs.org/model/hiller-felt-uh-12c): 1 registered aircraft, registry code 4360115 - [Hiller-Trident Helicopters UH-12C](https://openairdocs.org/model/hiller-trident-helicopters-uh-12c): 1 registered aircraft, registry code 4360809 - [World Helicopters UH-12C](https://openairdocs.org/model/world-helicopters-uh-12c): 0 registered aircraft, registry code 05627BC - [Hiller-Frye UH-12C](https://openairdocs.org/model/hiller-frye-uh-12c): 0 registered aircraft, registry code 4360101 - [Hiller-Wilco UH-12C](https://openairdocs.org/model/hiller-wilco-uh-12c): 0 registered aircraft, registry code 4360107 - [Hiller-Nunes UH-12C](https://openairdocs.org/model/hiller-nunes-uh-12c): 0 registered aircraft, registry code 4360113 - [Hiller/United Helicopter UH 12C](https://openairdocs.org/model/hiller-united-helicopter-uh-12c): 0 registered aircraft, registry code 4360134 - [Hiller-Palmer UH-12C](https://openairdocs.org/model/hiller-palmer-uh-12c): 0 registered aircraft, registry code 4360810 - [Rogerson Hiller UH-12C](https://openairdocs.org/model/rogerson-hiller-uh-12c): 0 registered aircraft, registry code 4364007 --- 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.