# TCDS 6H2: Siam Hiller Holdings Inc. - Type: Type certificate data sheet - Status: Current - Holder: Siam Hiller Holdings Inc. - Revision: 19 - Revised: October 28, 2014 - Product: Aircraft, Rotorcraft - Certification basis: CAR 6 - Registered aircraft: 84, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/90/27/90271543332ac7bf20480af0158aa7d60694022fbec35fcc724e51f19f4a4e9c - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1D44A1EA3F1601EE86257ED000643085.0001 - Page: https://openairdocs.org/tcds/6H2 ## Models (2) As the data sheet lists them. - UH-12C - UH-12B ## ADs (28, 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 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 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 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-12B](https://openairdocs.org/model/hiller-uh-12b): 35 aircraft (registry code 4360110) - [Hiller UH-12C](https://openairdocs.org/model/hiller-uh-12c): 31 aircraft (registry code 4360116) - [Hiller OH-23B](https://openairdocs.org/model/hiller-oh-23b): 6 aircraft (registry code 4360109) - [Hiller OH-23C](https://openairdocs.org/model/hiller-oh-23c): 3 aircraft (registry code 4360119) - [Hiller - World Helicopters UH-12C](https://openairdocs.org/model/hiller-world-helicopters-uh-12c): 2 aircraft (registry code 4360117) - [Hiller H-23B](https://openairdocs.org/model/hiller-h-23b): 1 aircraft (registry code 4360114) - [Hiller-Felt UH-12C](https://openairdocs.org/model/hiller-felt-uh-12c): 1 aircraft (registry code 4360115) - [Hiller-Heli-Cab UH-12B](https://openairdocs.org/model/hiller-heli-cab-uh-12b): 1 aircraft (registry code 4361001) - [Hiller-Helicopter Rep SVC UH-12B](https://openairdocs.org/model/hiller-helicopter-rep-svc-uh-12b): 1 aircraft (registry code 4360704) - [Hiller-Stanley UH-12C](https://openairdocs.org/model/hiller-stanley-uh-12c): 1 aircraft (registry code 4360105) - [Hiller-Tri-Plex Ind.Inc. UH-12B](https://openairdocs.org/model/hiller-tri-plex-ind-inc-uh-12b): 1 aircraft (registry code 4360801) - [Hiller-Trident Helicopters UH-12C](https://openairdocs.org/model/hiller-trident-helicopters-uh-12c): 1 aircraft (registry code 4360809) - [Hiller HTE-2](https://openairdocs.org/model/hiller-hte-2): 0 aircraft (registry code 4360112) - [Hiller UH-23-C](https://openairdocs.org/model/hiller-uh-23-c): 0 aircraft (registry code 4360125) - [Hiller-Clarcq UH-12B](https://openairdocs.org/model/hiller-clarcq-uh-12b): 0 aircraft (registry code 4360701) - [Hiller-Frye UH-12C](https://openairdocs.org/model/hiller-frye-uh-12c): 0 aircraft (registry code 4360101) - [Hiller-Mitchell UH-12B](https://openairdocs.org/model/hiller-mitchell-uh-12b): 0 aircraft (registry code 4360702) - [Hiller-Nunes UH-12C](https://openairdocs.org/model/hiller-nunes-uh-12c): 0 aircraft (registry code 4360113) - [Hiller-Palmer UH-12C](https://openairdocs.org/model/hiller-palmer-uh-12c): 0 aircraft (registry code 4360810) - [Hiller-Wilco UH-12C](https://openairdocs.org/model/hiller-wilco-uh-12c): 0 aircraft (registry code 4360107) - [Hiller/Hansen UH-12B](https://openairdocs.org/model/hiller-hansen-uh-12b): 0 aircraft (registry code 4360133) - [Hiller/United Helicopter UH 12C](https://openairdocs.org/model/hiller-united-helicopter-uh-12c): 0 aircraft (registry code 4360134) - [Rogerson Hiller H-23B](https://openairdocs.org/model/rogerson-hiller-h-23b): 0 aircraft (registry code 4364005) - [Rogerson Hiller H-23C](https://openairdocs.org/model/rogerson-hiller-h-23c): 0 aircraft (registry code 4364009) - [Rogerson Hiller HTE-2](https://openairdocs.org/model/rogerson-hiller-hte-2): 0 aircraft (registry code 4364003) - [Rogerson Hiller UH-12B](https://openairdocs.org/model/rogerson-hiller-uh-12b): 0 aircraft (registry code 4364001) - [Rogerson Hiller UH-12C](https://openairdocs.org/model/rogerson-hiller-uh-12c): 0 aircraft (registry code 4364007) ## STCs approved under this data sheet (40) - [STC SA4503NM](https://openairdocs.org/stc/SA4503NM): Remove original cloth covering and install Ceconite covering. Ceconite Division of Poly-Fiber Inc. - [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 SH277WE](https://openairdocs.org/stc/SH277WE): 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 (5 OF 6](https://openairdocs.org/stc/SA00680SE%20(5%20OF%206): 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 - [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 - [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 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 SH3319NM (1 OF 2)](https://openairdocs.org/stc/SH3319NM%20(1%20OF%202)) (historical): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc - [STC SA01240SE (1 OF 5)](https://openairdocs.org/stc/SA01240SE%20(1%20OF%205)) (historical): Installation of secondary voltage indication system. Visual Instruments LLC - [STC SA593CH (2 OF 5)](https://openairdocs.org/stc/SA593CH%20(2%20OF%205)) (historical): Install Champion SlickSTART magneto booster system.. Champion Aerospace LLC - [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.