# TCDS 6H1: Siam Hiller Holdings Inc. - Type: Type certificate data sheet - Status: Current - Holder: Siam Hiller Holdings Inc. - Revision: 13 - Revised: September 10, 2024 - Product: Aircraft, Rotorcraft - Certification basis: CAR 6 - Registered aircraft: 20, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/93/33/93337c535f0c0290ee9ce53c32780bce23af7a018deeb2a202094e184b115ce4 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID132156679520241002161306.0001 - Page: https://openairdocs.org/tcds/6H1 ## Models (2) As the data sheet lists them. - UH-12 - UH-12A ## What the data sheet says From the PDF's text layer, line by line; tables lose their columns. The PDF is the record. ```text DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION 6H1 Revision 13 SIAM HILLER UH-12 UH-12A (Navy HTE-1 Army H-23A) September 10, 2024 TYPE CERTIFICATE DATA SHEET NO. 6H1 This data sheet which is part of Type Certificate No. 6H1 prescribes conditions and limitations which the product for which the Type Certificate was issued meets the airworthiness requirements of the Civil Air Regulations. Type Certificate Holder: Siam Hiller Holdings, Inc. 925 M. Street Firebaugh, CA 93622-2234 Type Certificate Ownership Hiller Aircraft Corporation transferred to Record: Fairchild Industries, Inc. on October 2, 1959 Fairchild Industries, Inc. transferred to Heli-Parts, Inc. on December 28, 1972 Heli-Parts, Inc. transferred to Hiller Aviation on December 28, 1972 Hiller Aviation transferred to Rogerson Aircraft Corporation on June 26, 1984 Rogerson Aircraft Corporation transferred to Hiller Helicopters, a wholly owned subsidiary of Rogerson Aircraft Corporation On June 29, 1984 Hiller Helicopters, a wholly owned subsidiary of Rogerson Aircraft Corporation on November 14, 1985 Rogerson Hiller Corporation transferred to Siam Hiller Holdings, Inc. on July 14, 1994 I - Model UH-12, 3 POCLSH, Approved October 14, 1948 Engine Air cooled Motors Franklin 6V4-178-B33 Fuel 80 min Octane Aviation Gasoline Engine Limits Maximum RPM 3000 (178HP) Rotor Limits Power Off (Rotor Tach) Power On (Engine Tach.) Maximum 350 RPM Maximum 3000 RPM Minimum 294 RPM Minimum (S.L. to 6000’) 2800 RPM Minimum (7500’) 2900 RPM Minimum (9000’) 3000 RPM Airspeed Limits Never exceed speed-84 MPH (73 knots) True Ind. (at Sea Level) (Reduce speed 2.5 MPH for each 1000 feet of altitude). Altitude Limits Avoid slow speed operation between 10 and 325 feet. Above ground surface (See CAA/FAA Approved Flight Manual). 6H1 Page 2 CG Range (81.0) to (85.5) Empty Weight None Maximum Weight 2247 lbs. (For increased weight see NOTE under Section II for Model UH-12A) No. of Seats 3 (53) Maximum Baggage None. Fuel Capacity 27 Gallons (Usable fuel 23.5 gallons). (See NOTE 1 for data on “System Fuel and Oil”) Oil Capacity 10 Quarts (92) (See NOTE 1 for data on “System Fuel and Oil”) Rotor Blade (Tolerances +1/2º. Movements Main blades: Collective Pitch +10º to 1º (measured at retention plate) (Low setting is determined as the lowest Setting which will preclude over speeding in Auto-Rotation. Teetering ±8º Control blades: Neutral 9º incidence with wobble plate level. Cyclic Pitch +22-1/2º from neutral with main rotor normal to shaft. Anti-torque rotor blades: Flapping +20º to -10º Collective Pitch +15º to -3º Horizontal Stabilizer Setting -9º to -19º (-19º is satisfactory for all configurations and is required for certain Configurations as noted under the pertinent item of equipment) Serial No. Eligible 103 through 295 except 210 Required equipment In addition to the pertinent required basic equipment specified in CAR 6, the following items of equipment must be installed: Items 1(a), 2(a), 3(a), 101(a), 102, 103, 104, 105, 107, 108, 201(a), 202(a), 206, 207, 301, 302, 401 II-Model UH-12A Navy HTE-1, Army H-23A), 3 POCLSH, Approved May 8, 1950 (Model UH-12 may be converted to Model UH-12A by the addition of Items 4 and 109. Item 1(b) replaces Item 1(a) and Item 402 replaces Item 401. These changes make the UH-12 Identical to the UH-12A and eligible for the UH- 12A maximum weight and UH-12A approved equipment) Engine Air cooled Motors Franklin 6V4-178-B33 (See Item 130 and 133 for optional engines) Fuel 80 min. Octane Aviation Gasoline Engine Limits Maximum RPM 3000 (178 HP) Rotor Limits and Power Off (Rotor Tach.) Power On (Engine Tach.) Engine Operating Maximum 350 RPM Maximum 3000 RPM Speed Minimum 294 RPM Minimum (S.L. to 6000’) 2800 RPM Minimum (7500’) 2900 RPM Minimum (9000’) 3000 RPM 6H1 Page 3 Airspeed Limits Never exceed speed-84 mph (73 knots) True Ind. (at Sea Level) (Reduce speed 2.5 mph for each 1000 ft. of altitude). Altitude Limits Avoid slow speed operation between 10 and 325 ft. above ground surface (See CAA/FAA Approved Flight Manual). CG Range 8 Degree HUB (81.0) to (85.5) 12-9 Degree Hub (80.1) to (84.6) (See Item 211 for C.G range with skis installed) Empty Weight None C.G. Range Maximum Weight 2400 lbs. (For increased weight see Item 212) No. of Seats 3 (53) Maximum Baggage None Fuel Capacity 27 Gallons (85) (Usable fuel 23.5 Gallons). (See NOTE 1 for data on “System Fuel and Oil”) Oil Capacity 10 quarts (92) (See NOTE 1 for “System Fuel and Oil”) Rotor Blade (Tolerances + 1/2º) Movements Main blades: Collective pitch +10º to -1º (measured at retention plate) (Low setting is determined as the lowest setting which will preclude over speeding in autorotation). Teetering + 8º Control Blades: Neutral 9º incidence with wobble plate level Cyclic Pitch +22-1/2º from neutral with main rotor normal to shaft. Anti-torque rotor blades: Flapping +20º to -10º Collective Pitch +15 to -3º Horizontal Stabilizer Setting -9º to -19º (-19º is satisfactory for all configurations and is required for certain configurations as noted under the pertinent item of equipment) Serial No. Eligible 103 through 295 except 210 Required equipment In addition to the pertinent required basic equipment specified in CAR 6, the following items of equipment must be installed: Items 1(b), 2(a), 3(a), 4, 101(a), 102, 103, 104, 105, 107, 108, 109, 201(a), 202(a), 206, 207, 301, 302, 304, 402. Specifications Pertinent to All Models Datum 107.25 in. fwd. of tail boom - fuselage upper face Leveling means Lugs on brackets on left side at Sta. 66 and Sta. 100 Certification basis Type Certificate No. 6H1 (CAR 6) Production basis Production Certificate No. 423WE, Spare Parts Only 6H1 Page 4 Equipment: Values in inches shown in parenthesis after each item represent horizontal arms to the center of gravity of the item measured to the rear of the datum. A plus (+) or minus (-) sign preceding the weight of an item indicates the net weight change when that item is installed. Rotors and Rotor Equipment 1 2 main rotor blades (a) United Helicopters Dwg. 53000-2 176 lb (85) (b) United Helicopters Dwg. 53001 176 lb (85) Each blade must have identification plate No. 53002 installed at the factory to indicate eligibility for installation on Model UH-12A. (c) Parsons Dwg. 40-001-5, -4, -3, or -2 with faired leading-edge assembly. 176 lb. (85) (These blades may be used as alternate equipment on UH-12A helicopters.) 2. 2 control blades (a) United Helicopters Dwg. 36203 30 lb (85) 3. 2 tail rotor blades (a) United Helicopters Dwg 55008 9 lb (327) (b) Hiller Dwg. 55064 Use actual wt. ch. (Installed per Hiller S.B. 80) 4. Collective pitch ballast system installed in accordance with +3 lb (85) United Helicopters Dwg. 30001 5. Dual collective pitch control stick installed in accordance with United Helicopters +6 lb (67) Dwg. 31222 6. Collective pitch bungee United Helicopters Dwg. 30002 +1 lb (65) 7. Cyclic control stick shield in conformance with United Helicopters Dwg. 64040 Use actual wt. ch. 8. Cyclic floor stick installation with isolation linkage as per Hiller Dwg. No. 33100-5. With this item installed, the horizontal stabilizer setting must be changed to -19°. Use actual wt. ch. 9. Modified dual twist-grip throttle installation as per Hiller Dwg. 31259 Use actual wt. ch. 10. Revised cyclic control trim system incorporating SCHWEIN actuators as per Hiller Dwg. No. 33190 Use actual wt. ch. 11. 12-9° hub installed per Hiller Service Bulletin No. 51A (UH-12A, series 246 Use actual wt. ch. through 295). When this item is installed the following changes apply: (a) C.G. of Items 1, 2 and 4 is at (84.2) (b) Rotor blade movements (measured with respect to the mast) (Note - when the mast is vertical the helicopter is 1° nose up) Main Blades: Collective pitch same as Basic UH-12A Teetering Control rotor +12°; Main rotor +9° 6H1 Page 5 Wobble Plate Lateral +7.7° to +8.3° Longitudinal +8.0° to +8.5° Control Blades Neutral +9° incidence (Rotor Hub & Wobble Plate perpendicular to mast) (c) Item 402(c) is required with this installation. Engine and Engine Accessories - Fuel and Oil System 101. Oil cooler (a) Clifford E36793 with thermostatic valve DV8-U3225-V 12 lb. (78) (b) Harrison Radiator Div. #AP-12AU09-01 Use actual wt. ch. 102. Carburetor air heater - United Helicopters Drawings. 76100 and 76110 4 lb. (96.5) 103. Auxiliary fuel pump - Weldon 4013A 3 lb. (78) 104. Fan - United Helicopters Dwg. 74301 3 lb. (78) 105. Carburetor zone support bracket - United Helicopters Dwg. 76104 2 lb. (97) 106. Starter - Delco Remy 1109661 or equivalent 18 lb. (78) 107. System fuel and oil (See NOTE 1 for definition) 7 lb. (90) 108. Unusable fuel (See NOTE 1 for definition) 21 lb. (85) 109. Fuel pressure relief valve and pressure switch United Helicopters Dwg. 72200 2 lb. (80) (When Item 132 is installed, Item 109 is not required) 110. Long range fuel tank installation United Helicopters Dwg. 72127 Use actual wt. ch. 111. Engine cowling installation in accordance with U.H. Dwg. 65000 Use actual wt. ch. 120. Carburetor air filter, Vortex G80R (Special), installed per U.H. Dwg. 95000 13 lb. (109) 130. Engine Air cooled Motors Franklin 6V4-200-C33 Use actual wt. ch. (0-335-6) or (YO-335-6) Fuel 91/96 Min. grade aviation gasoline Engine limits For all operations, Maximum rpm 3100 (200 hp) Rotor limits and Power Off (Rotor Tach.) Power On (Engine Tach.) engine operating speeds Maximum 360 Maximum 3100 RPM Minimum 300 Min (S.L. to 6000') 2900 rpm (Above 6000' increase min. rpm by 25 RPM for each additional 1000’ of altitude) Approved only for UH-12A, Item 402(d) is required, and Item 131 replaces Item 101. Installation to be per all following Hiller Service Bulletins: (a) No. 33 dated June 25, 1953 (b) No. 28 dated August 5, 1953 (c) No. 35 dated January 5, 1953 (d) No. 37 dated June 25, 1953 (e) No. 18B revised April 30, 1954 (No. 18 and 18A not approved for this installation). 131. Oil Cooler - Harrison 8518115 Use actual wt. ch. 132. Vane type main fuel pump installation per Hiller Service Bulletin No. 28 Use actual wt. ch. 133. Engine Air cooled Motors Franklin 6V-335-B Use actual wt. ch. Installed per Hiller Service Bulletin No. 70 Fuel 91/96 Min. grade aviation gasoline Engine Limits For all operations, Maximum rpm 3100 (210 hp) Rotor Limits and Engine Operating Speeds (Same as 6V4-200-C33 engine) (Approved only for UH-12A, Item 402 (g) is required and Items 131 and 134 replace Items 101 and 102) 134. Engine air intake system per Hiller Service Bulletin No. 74 Use actual wt. ch. 135. Automatic auxiliary fuel pump system - UH-12A (Item 402(h) required) 2 lb. (55) 6H1 Page 6 Landing Gear 201. 2 Main wheel-brake assemblies, 5.00-4 Type III 10 lb. (105.5) (a) Goodrich Model 451M Wheel assembly No. D-3-142M Brake assembly No. D-2-113 202. 2 main wheel tires, 5.00-4, Type III 10 lb. (105.5) (a) 4 ply tires with regular tubes 10 lb. (105.5) (b) 6 ply tires with regular tubes 11 lb. (105.5). 206. Nose wheel, 10 in., Type I (a) Goodrich assembly No. B-3-41 3 lb. (32) 207. Nose wheel 6 ply rating tire, 10.00, Type I, Channel Tread with regular tube. 3 lb. (32) 210. Flotation gear installed in accordance with United Helicopters Dwg. 44000. +104 lb. (64) With this equipment installed, Item 4 (collective pitch ballast system) must also be installed and stabilizer setting must be changed to -19°. Reduce never exceed speed to 76 mph (66 knots) True Ind. (Sea Level). See CAA Approved Flight Manual. 211. Skis (a) Federal A2000A installed in accordance with Kenting Aviation Limited Use actual wt. ch. Dwgs. 501 and 502 Approved only for Model UH-12A. When this item is installed the following changes apply: (1) C.G. range @2400 lbs. @2270 lbs. 8 degree hub (81.0) to (82.7) (81.0) to (85.5) 12-9 degree hub (80.1) to (81.8) (80.1) to (84.6) (Straight line variation between weights shown) (2) Horizontal stabilizer setting must be at -19° (3) Item 402(b) is required 212. Skid type landing gear installation per Hiller Service Bulletin No. 47 (a) UH-12A at 2400 lbs. maximum weight. Item 402(e) is required) Use actual wt. ch. (b) UH-12A at 2500 lbs. max. weight. (Items 402 (f) and 130 or 133 are Use actual wt. ch. required and the horizontal stabilizer must be set at -19°) Electrical Equipment 301. Generator - Autolite GFU-4105-12V, or equivalent 11 lb. (88) 302. Battery - Exide 6-TS-9F, or equivalent (See Loading Instructions in Flight 27 lb. (17) Manual regarding battery location.) or (125.5) 303. Lighting system installed in accordance with United Helicopters Dwg. Use actu al wt. ch. 87000. With this equipment installed, replace placard NOTE 2(d) with placard NOTE 2(1). 304. Voltage Regulator, Autolite VRS-4010-B, installed with Item 301 only 1 lb. (66) 305. Generator - 12V., 25 amp. (Delco - Remy 110/877 modified per United +3.5 lb. (88) Helicopters Dwg. 83008) 306. Voltage Regulator, Delco - Remy 1118317, installed with Item 305 only + .5 lb. (66) 307. Accessories electrical harness United Helicopters Dwg. 94016-1 +1.0 lb. (54) 308. 24-volt electrical system as per Hiller Dwg. No. 83017 Use actual wt. ch. 6H1 Page 7 Interior Equipment 401. United Helicopters Model UH-12 CAA/FAA Approved Flight Manual dated April 19, 1949, revised November 7, 1949. 402. (a) United Helicopters Model UH-12A Approved Flight Manual dated April 26, 1950, revised September 20, 1954 (Required with all configurations) (b) UH-12A Flight Manual Revisions dated July 7, 1953 (Required with Item 211) (c) UH-12A Flight Manual Revision dated February 20, 1957 (Required with Item 11) (d) UH-12A Flight Manual Supplement A dated February 21, 1957 (Required with Item 130) (e) UH-12A Flight Manual Supplement B dated February 22, 1957 (Required with Item 212(a)) (f) UH-12A Flight Manual Supplement C dated February 25, 1957 (Required with Item 212(b)) (g) UH-12A Flight Manual Revision dated January 23, 1958 (Required with Item 133) (h) UH-12A Flight Manual Revision dated May 10, 1960 (Required with Item 135) Miscellaneous (not listed above) 601. Cockpit enclosure canopy, installed in accordance with United Helicopters Use actual wt. ch. Dwg. 64030. This converts the helicopter to a 3 PCLH. 602. Crop dusting and spraying equipment (a) Crop dusting equipment, installed in accordance with United Use actual wt. ch. Helicopters Dwg. 93000. Items 120, 305, and 306 must also be installed. With dusting equipment installed, reduce never exceed speed to 76 mph. True Ind. (Sea Level). Minimum speed while dusting, 15 mph True Ind. For additional operating limitations including requirements for eligibility for Sulphur dusting, see CAA Approved Flight manual. (b) Crop spraying equipment, installed in accordance with United Use actual wt. ch. Helicopters Dwg. 94000. With this equipment installed, stabilizer setting must be changed to -19°. Never exceed speed is reduced to 76 mph True Ind. (Sea Level). Minimum operating speed while spraying is 15 mph True Ind. For further operating limitations as a sprayer, see CAA Approved Flight Manual. (c) Aerosol equipment installed in accordance with United Helicopters Use actual wt. ch. Dwg. 94500. With this equipment installed, reduce never exceed speed to 76 mph True Ind. (Sea Level); minimum speed while fogging is 15 mph. True Ind. For further limitations see CAA Approved Flight Manual. 603. Litter installation in accordance with United Helicopters Dwg. 96100. Decrease Use actual wt. ch. never exceed speed to 76 mph True Ind. (Sea Level) Item 4 must also be installed. 604. Cabin heater installation in accordance with United Helicopters Dwg. 88000. Use actual wt. ch. 605. Flare installation in accordance with United Helicopters Dwg. 87004. Use actual wt. ch. This item must not be installed on helicopters equipped with the flotation gear, Item 210, due to possible interference. NOTES: NOTE 1. Current weight and balance report including list of equipment included in certificated weight empty, and loading instructions must be in each helicopter at the time of original certification and at all times thereafter (except in the case of air carrier operators having an approved weight control system). Ballast, when necessary, must be carried in accordance with Loading Instructions in the Approved Flight Manual. 6H1 Page 8 Fuel and oil capacities as indicated are total tank capacities over and above "System Fuel and Oil". The fuel tank capacity includes "Unusable" fuel of 3.5 gallons, which cannot be used safely in all flight attitudes, and which must be included in the empty weight. "System Fuel and Oil", which must be included in the empty weight, is that amount required to fill the fuel system and tank up to the tank outlet to the engine, plus the oil required to fill the oil cooler and lines. NOTE 2. The following placards must be installed so as to be in full view of the pilot: (a) "Decrease Vne 2.5 mph per 1000 ft." (b) "Above 6000 ft. see Operating Limitations." (c) "This helicopter to be operated in accordance with CAA/FAA Approved operating limitations." (d) "Night and instrument flight prohibited." (Unless Item 303 is installed.) (e) "No acrobatic maneuvers approved." (f) "See loading instructions in Flight Manual." (g) "Unsymmetrical loading must be to the left." (h) "Do not stand while rotor is turning." (i) "Avoid protracted rearward flight." (j) On top of Battery Box: "Caution, for proper location of battery, see loading instructions, Section IV, Flight Manual." (k) On floor where Battery goes forward: "Caution, for proper location of battery, see loading instructions, Section IV, Flight Manual." (l) "Instrument flight prohibited." (Only when Item 303 is installed.) (m) Above fuel quantity gauge (if auxiliary fuel tank is installed.) "Do not drain auxiliary fuel tank with main tank more than 1/4 full." (n) On auxiliary fuel tank valve (if auxiliary fuel tank is installed) "Do not drain auxiliary fuel tank with main tank more than 1/4 full." NOTE 3. Information essential to the proper maintenance of the rotorcraft (helicopter) including retirement times of critical parts is included in the manufacturer's maintenance instructions provided with each rotorcraft. These values of retirement or service life cannot be increased without CAA/FAA Engineering approval. NOTE 4. These helicopters must be serviced and maintained in conformance with instructions given by Hiller Helicopters in Items 401 and 402 and the Service and Parts Handbook. NOTE 5. Certain part numbers used on this model helicopter may be used on other model helicopters in which their use is life limited. These part numbers are listed in TCDS 4H11, H1WE, 4H10, 6H1, and 6H2 and FAA approved Hiller Instructions for Continued Airworthiness. If a full and complete service history from manufacture forward is not available that demonstrates these parts were used only on a model helicopter for which the part is not life limited, then those parts shall be life limited to the lowest number of hours given in those TCDS’s or ICAs. If a full and complete service history from the manufacturer forward is available, and any operating time has occurred in a life limited model helicopter, that part shall be considered life limited at the lowest life limit listed even if transferred and used on a helicopter model for which it is not life limited. Only those parts for which a full and complete service history from manufacture forward is available and which shows only operating time on a helicopter model for which it is not life limited are considered not life limited. … END… ``` ## ADs (29, in force first) - [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 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 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 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 62-03-01](https://openairdocs.org/ad/62-03-01): Tail Rotor · Hiller UH-12A and UH-12B. Effective Jan 30, 1962 - [AD 2015-20-51](https://openairdocs.org/ad/2015-20-51): Hiller UH-12, UH-12A, UH-12B and 6 more - [AD 51-20-03](https://openairdocs.org/ad/51-20-03): Collective Pitch Ballast System Bracket · Hiller UH-12 and UH-12A - [AD 52-01-08](https://openairdocs.org/ad/52-01-08): Collective Pitch Incidence Arms · Hiller UH-12, UH-12A and UH-12B - [AD 52-29-01](https://openairdocs.org/ad/52-29-01): Tail Rotor Drive Slip Joint Assembly Inspection · Hiller UH-12, UH-12A and UH-12B - [AD 53-09-03](https://openairdocs.org/ad/53-09-03): Outboard Tension Bar Pins · Hiller UH-12, UH-12A and UH-12B - [AD 53-12-01](https://openairdocs.org/ad/53-12-01): Horizontal Stabilizer Spar · Hiller UH-12, UH-12A and UH-12B - [AD 53-24-02](https://openairdocs.org/ad/53-24-02): Tail Rotor Pitch Change Rod · Hiller UH-12, UH-12A and UH-12B - [AD 55-19-01](https://openairdocs.org/ad/55-19-01): Tail Boom Rear Bulkhead · Hiller UH-12, UH-12A and UH-12B - [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 - [AD 56-27-02](https://openairdocs.org/ad/56-27-02): Engine Mount Welds · Hiller UH-12, UH-12A and UH-12B - [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 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 59-25-03](https://openairdocs.org/ad/59-25-03): Wobble Plate Screws · Hiller UH-12, UH-12A, UH-12B and 3 more - [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](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 - [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 ## Registered aircraft by registry model (OpenAirDocs) - [Hiller UH-12A](https://openairdocs.org/model/hiller-uh-12a): 16 aircraft (registry code 4360104) - [Hiller UH-12](https://openairdocs.org/model/hiller-uh-12): 2 aircraft (registry code 4360102) - [Hiller H-23A](https://openairdocs.org/model/hiller-h-23a): 1 aircraft (registry code 4360108) - [Hiller-Yehnert UH-12](https://openairdocs.org/model/hiller-yehnert-uh-12): 1 aircraft (registry code 4360103) - [Hiller HTE-1](https://openairdocs.org/model/hiller-hte-1): 0 aircraft (registry code 4360106) - [Rogerson Hiller H-23A](https://openairdocs.org/model/rogerson-hiller-h-23a): 0 aircraft (registry code 4363007) - [Rogerson Hiller HTE-1](https://openairdocs.org/model/rogerson-hiller-hte-1): 0 aircraft (registry code 4363005) - [Rogerson Hiller UH-12](https://openairdocs.org/model/rogerson-hiller-uh-12): 0 aircraft (registry code 4363001) - [Rogerson Hiller UH-12A](https://openairdocs.org/model/rogerson-hiller-uh-12a): 0 aircraft (registry code 4363003) ## STCs approved under this data sheet (35) - [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 SH276WE](https://openairdocs.org/stc/SH276WE): Installation of UH-12C Upper Canopy. Heck Research 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 SA593CH](https://openairdocs.org/stc/SA593CH): Install Champion SlickSTART magneto booster system.. Champion Aerospace LLC - [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 SH3184NM](https://openairdocs.org/stc/SH3184NM): Pilot-in-Command position to be in left seat with all normal controls and control-mounted switches at that crew station.. Croman Corporation - [STC SH3185NM](https://openairdocs.org/stc/SH3185NM): Pilot-in-Command position to be in left seat with all normal controls and control-mounted switches at that crew station. Croman Corporation - [STC SH3183NM](https://openairdocs.org/stc/SH3183NM): Pilot-in-Command position to be in left seat with all normal controls and control-mounted switches at that crew station.. Croman Corporation - [STC SA2190NM PAGE 1](https://openairdocs.org/stc/SA2190NM%20PAGE%201): Installation of electronics International Digital Volt/Amp Gauges and Accessories.. Electronics International - [STC SH446EA](https://openairdocs.org/stc/SH446EA): Installation of Franklin engine Model 6V-350B in Fairchild Hiller UH-12A helicopter.. Franklin Engine Co Inc - [STC SH80WE](https://openairdocs.org/stc/SH80WE): Installation of Simplex thirty-two foot spray boom.. Simplex Manufacturing Co - [STC SH1-457](https://openairdocs.org/stc/SH1-457): Aircooler Motors 6VS-335B turbo-supercharged engine (derated).. Carson Helicopters Inc - [STC SH160AL](https://openairdocs.org/stc/SH160AL): Airborne control survey system.. US Dept of Interior - [STC SH32WE](https://openairdocs.org/stc/SH32WE): Fabricate and install jump-step.. USDA Forest Service - [STC SH4-1101](https://openairdocs.org/stc/SH4-1101): Aerofilter 30690B with element1A0286.. Winslow Aerofilter Corp - [STC SH4-178](https://openairdocs.org/stc/SH4-178): Curved control stick.. Nystrom Aviation Inc - [STC SH52WE](https://openairdocs.org/stc/SH52WE): High volume fifty foot spray boom kit.. Simplex Manufacturing Co - [STC SH77AL](https://openairdocs.org/stc/SH77AL): Tundra snow shoes.. ERA Helicopters Inc - [STC SH9AL](https://openairdocs.org/stc/SH9AL): Airglas tundra pads L-100.. Intl Helicopters - [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 --- 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.