# TCDS H7SO: Overseas Aircraft Support Inc. - Type: Type certificate data sheet - Status: Current - Holder: Overseas Aircraft Support Inc. - Revision: 14 - Revised: April 20, 2021 - Product: Aircraft, Rotorcraft - Certification basis: Part 21, Part 21, Part 21, Part 21, Part 21 - Registered aircraft: 8, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/ce/9e/ce9e5b99b35b304d287aabf924cc886bcae0821fdb5b6feb15faebe2ca710530 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E37E1EB30CBEB552862587F7005548DE.0001 - Page: https://openairdocs.org/tcds/H7SO ## Models (5) As the data sheet lists them. - TH-1L - UH-1B - UH-1L - UH-1H - UH-1E ## ADs (7, in force first) - [AD 2010-14-12](https://openairdocs.org/ad/2010-14-12): Landing Gear System · Overseas Aircraft Support UH-1H, UH-1F, UH-1H and 40 more. Effective Jul 23, 2010 - [AD 89-20-12](https://openairdocs.org/ad/89-20-12): Tail Rotor Hub Assembly · Overseas Aircraft Support 204B, 205A, 205A-1 and 8 more. Effective Aug 15, 1990 - [AD 2000-22-51](https://openairdocs.org/ad/2000-22-51) (historical): Main Rotor Mast or Trunnion · Arrow Falcon Exporters UH-1H, UH-1F, HH-1K and 33 more. Effective Dec 26, 2000 - [AD 97-20-09](https://openairdocs.org/ad/97-20-09) (historical): Vertical fin spar · Arrow Falcon Exporters UH-1H, UH-1F, UH-1F and 33 more. Effective May 28, 1998 - [AD 89-17-03](https://openairdocs.org/ad/89-17-03) (historical): Main Rotor Masts · California Department of Forestry UH-1F, TH-1L, UH-1B and 18 more. Effective Sep 5, 1989 - [AD 2000-08-53](https://openairdocs.org/ad/2000-08-53) (historical): Main Rotor System · AST UH-1F, HH-1K, TH-1F and 32 more - [AD 97-20-09 PL](https://openairdocs.org/ad/97-20-09-PL) (historical): Tailboom Vertical Fin Spar · California Department of Forestry UH-1F, UH-1F, TH-1F and 31 more ## Registered aircraft by registry model (OpenAirDocs) - [Williams Helicopter UH-1H](https://openairdocs.org/model/williams-helicopter-uh-1h): 6 aircraft (registry code 9790870) - [Williams Helicopter Corp/Oas UH-1E](https://openairdocs.org/model/williams-helicopter-corp-oas-uh-1e): 1 aircraft (registry code 9790975) - [Williams Helicopter UH-1B](https://openairdocs.org/model/williams-helicopter-uh-1b): 1 aircraft (registry code 9790871) ## STCs approved under this data sheet (38) - [STC SR12332SE](https://openairdocs.org/stc/SR12332SE): Installation of Mechanical Specialties, LLC Human External Cargo (HEC) and non-HEC Hook System. Mechanical Specialties, LLC - [STC SR02796SE](https://openairdocs.org/stc/SR02796SE): Installation of Human External Cargo (HEC) system. Boost Systems LLC - [STC SR00266SE](https://openairdocs.org/stc/SR00266SE): Replacement of the Lycoming Model T53-L-13B engine with a Lycoming Model T53-L-703 engine flat rated to the same power settings specified in Type Certificate Data Sheet (TCDS) H15NM. Overseas Aircraft Support Inc. - [STC SH8609SW](https://openairdocs.org/stc/SH8609SW): Fabrication of Isolair Eliminator II Model 4600-205 fire fighting system.. Isolair Inc. - [STC SR01776SE](https://openairdocs.org/stc/SR01776SE): Fabrication, installation, and maintenance of the Isolair Helicopters, Inc., Model 9002 High Cross tubes. Isolair Inc. - [STC SH3744NM](https://openairdocs.org/stc/SH3744NM): Dual Battery Installation. WSH, LLC - [STC SR00026DE](https://openairdocs.org/stc/SR00026DE): Installation of tailboom 24 inch plug extension, commercial style main rotor blades, and rotorhead.. Midwest Aerospace TC LLC - [STC SR00073DE](https://openairdocs.org/stc/SR00073DE): Replacement of Lycoming T53-L-13 series powerplant. Midwest Aerospace TC LLC - [STC SR00119DE](https://openairdocs.org/stc/SR00119DE): Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003, and Control Cables. Midwest Aerospace TC LLC - [STC SR00143DE](https://openairdocs.org/stc/SR00143DE): Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003. Midwest Aerospace TC LLC - [STC SR09177RC](https://openairdocs.org/stc/SR09177RC): Modification of the vertical fin spar. Midwest Aerospace TC LLC - [STC SR02761LA](https://openairdocs.org/stc/SR02761LA): Installation of UH-1H composite main rotor blades on the UH-1B helicopters. Northern X-Treme Helicopters - [STC SR00713SE](https://openairdocs.org/stc/SR00713SE): Installation of Onboard Systems International Cargo Hook Kit. Onboard Systems International - [STC SH5690NM](https://openairdocs.org/stc/SH5690NM): Installation of Advanced Technology Aircraft Co. engine barrier filter.. WSH, LLC - [STC SR02475SE](https://openairdocs.org/stc/SR02475SE): Installation of a Tailboom Motion Detection System. Aircraft Structural Repair Inc. - [STC SR02492LA](https://openairdocs.org/stc/SR02492LA): Installation of a Helicopter Technology Company main rotor blade assembly. Helicopter Technology Co - [STC SR02641SE](https://openairdocs.org/stc/SR02641SE): Installation of a Service Deck. Northwest Heli-Structures Inc - [STC SR02070SE](https://openairdocs.org/stc/SR02070SE): Fabrication of Dart D205-770-011 Replacement Engine Mount Kit. Dart Aerospace USA Inc. - [STC SR00929SE](https://openairdocs.org/stc/SR00929SE): Fabrication of tail boom mounted strakes.. BLR Aerospace LLC. - [STC SR01039SE](https://openairdocs.org/stc/SR01039SE): Fabrication of tail boom mounted strakes in accordance with Master Drawing List Number BL-UH1H-01, Revision D, dated September 10, 2001, or later Federal Aviation Administration (FAA)-approved revision; and installation of this strake system. BLR Aerospace LLC. - [STC SR01470SE](https://openairdocs.org/stc/SR01470SE): Fabrication and Installation of Fast Fin System.. BLR Aerospace LLC. - [STC SR03408CH](https://openairdocs.org/stc/SR03408CH): Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103. Airwolf Aerospace LLC - [STC SR02413LA](https://openairdocs.org/stc/SR02413LA): Installation of an AKV, Inc Exceedence and Trend Monitoring System kit P/N ETM1000. AKV Inc. - [STC ST04270AT](https://openairdocs.org/stc/ST04270AT): Install the VTOL ASSALT V3 Windscreen Laminate Kit. VTOL LLC - [STC SR00767SE](https://openairdocs.org/stc/SR00767SE): Fabrication of Helipro spar replacement system. Vector Aerospace Helicopter Services USA Inc. - [STC SR00267SE](https://openairdocs.org/stc/SR00267SE): Fabrication and Installation of a Bell Model 212 vertical tail fin and rotor, 42 and 90 gearboxes, and 212 push rod anti-torque control system. Vector Aerospace Helicopter Services USA Inc. - [STC SR01742NY](https://openairdocs.org/stc/SR01742NY): Installation of extended height landing gear.. Dart Aerospace Limited - [STC SR01196LA](https://openairdocs.org/stc/SR01196LA): Installation of Honeywell (Lycoming) T53-L-703 engine to replace Honeywell (Lycoming) T53-L-13/13B/-13BA engine. Responsible ACO is Los Angeles, NM-L.. Minuteman Aviation Inc. - [STC SR02051LA](https://openairdocs.org/stc/SR02051LA): Installation of a VAn Horn Aviation Tail Rotor Blade.. Van Horn Aviation LLC - [STC SR01946SE](https://openairdocs.org/stc/SR01946SE): Installation of the Mechanical Specialties, Model UH606. Mechanical Specialties Inc - [STC SR09257RC](https://openairdocs.org/stc/SR09257RC): Fabrication, modification, and installation of a new vertical fin spar in accordance with Global Helicopter Technology, Inc., Drawing number VTF-030-800, Revision D, dated March 26, 2001, or later FAA approved revision.. Global Spar LLC - [STC SR09316RC](https://openairdocs.org/stc/SR09316RC): Fabrication, modification, and installation of a new vertical fin spar in accordance with Global Helicopter Technology, Inc., Drawing number VTF-030-801, Revision B, dated April 5, 2001, or later FAA approved revision.. Global Spar LLC - [STC SR02204LA](https://openairdocs.org/stc/SR02204LA): Installation of an AKV, INC. N1/N2 Cycle Counter, PN UH1T53CC. AKV Inc. - [STC SR00103SE](https://openairdocs.org/stc/SR00103SE): Installation of Aviation Development Corporation oil filter. Aviation Development Corporation - [STC SR01298NY](https://openairdocs.org/stc/SR01298NY): Installation of replacement crosstubes P/N D212-664.. Dart Aerospace Limited - [STC SR00563NY](https://openairdocs.org/stc/SR00563NY): Installation of Skidtubes and associated saddles. Dart Aerospace Limited - [STC SR00332NY](https://openairdocs.org/stc/SR00332NY): Installation of Avionics Specialties power analyzer and recorder no. SL17009 and SL17061.. Aerosonic Corporation - [STC SR01395NY](https://openairdocs.org/stc/SR01395NY): Installation of adjustable engine mount.. Dart Aerospace Limited --- 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.