# TCDS H5NM: Midwest Aerospace TC LLC - Type: Type certificate data sheet - Status: Current - Holder: Midwest Aerospace TC LLC - Revision: 11 - Revised: February 8, 2023 - Product: Aircraft, Rotorcraft - Certification basis: Part 21 - Registered aircraft: 2, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/28/5a/285a8aa700b49f5c291dcb284e82d3541e914c1a248574095699c3acf0b8f6ea - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID123099937920230629180247.0001 - Page: https://openairdocs.org/tcds/H5NM ## Models (4) As the data sheet lists them. - HH-1K - UH-1L - UH-1E - TH-1L ## 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 H5NM Revision 11 Midwest Aerospace TC LLC UH-1E UH-1L TH-1L HH-1K February 8, 2023 TYPE CERTIFICATE DATA SHEET NO. H5NM This data sheet which is part of Type Certificate No. H5NM prescribes c onditions and limitations under which the product for which the type certificate was issued meets the airworthiness requirements of the Federal Aviation Regulations. Type Certificate Holder Midwest Aerospace TC LLC 9465 Joliet Street St. John, IN 46373 Type Certificate Holder Record Rotorcraft Development Corporation transferred to Midwest Aerospace TC LLC., on February 8, 2023 Garlick Helicopter Corporation transferred to Rotorcraft Development Corporation on September 6, 2012. Garlick Helicopter, Inc. transferred TC H5NM to Garlick Helicopter Corporation on June 29, 2007. Roy D. Regan & James P. Ross (Co-Partners) transferred TC H5NM to Garlick Helicopters, Inc. on November 21, 1989. I - Model UH -1E - (Restricted Category Military Surplus Helicopter ) Engine Lycoming T-53-L-11D (See Notes 8 & 13 for Alternate Engines) Fuel Grade JP-4, JP-5, or see U.S. Navy NAVAIR 01-110HCA-1 for substitute and emergency fuels. Engine Limits Torque Pressure (PSI) Output RPM Exhaust Gas Temperature (Deg. C) Max. Continuous 46.0 (900 HP) 6600 620 30 Min. Operation 48.0 (1000 HP) 6600 620-640 Maximum Allowable 50.0 (1100 HP) 6600 640 Rotor Limits Power Off Power On Maximum 339 RPM Maximum 324 RPM Minimum 295 RPM Minimum 294 RPM Continuous Operation 294-324 RPM Airspeed Limits Never Exceed 140 knots up to and including 6600 lb G.W. Sea level to 2000 ft. Sideward and rearward flight airspeed limitation 30 knots. Other Limits Flight Hours are counted from takeoff to landing. The helicopters approved under this type certificate are done so under the concept of limited exposure associated with escape from inadvertent ice encounters, and are prohibited against flight into known icing. The helicopters must be re-evaluated if certification to the General Ice protection Airworthiness Regulations is requested. Page No. 1 2 3 4 5 6 7 Rev. No. 11 9 9 9 9 9 10 H5NM Page 2 of 7 I - Model UH -1E (cont’d) C.G Range Most forward C.G. up to 8150 lb G.W. Fuse Sta. 125.0 Most forward C.G. at 8,500 lb G.W. Fuse Sta. 125.5 / 9,500 lb G.W. Fuse Sta. 126.7 Most aft C.G. up to 7,000 lb G.W. Fuse. Sta. 138.0 Most aft C.G. at 8,500 lb G.W. Fuse. Sta. 134.4 / 9,500 lb G.W. Fuse Sta. 132.0 Empty Weight (+125.0) to (+138.0) C.G. Range Maximum Weight 9,500 lb all conditions. Minimum Crew 1 (pilot) for VFR flight. Maximum Passengers (See Note 13.) Fuel Capacity Useable 242 U.S. Gallons Oil Capacity 3.25 U.S. Gallons Rotor Blade and For rigging information refer to U.S. Navy Technical Manual NAVAIR 01 -110HCA-2 Control Movements Approved Serial Nos. Surplus UH-1 E helicopters are identified in FAA Approved Garlick Helicopters Report No. GHI-TC02, dated April 7, 1995 or later approved revision. II - Model UH-1L TH-1L and HH-1K- 9PCLH (Utility Helicopter Restricted Category Engine Lycoming T-53-L-13B (See Notes 8 & 15 for Alternate Engines). Fuel Grade JP-4, JP-5, or see U.S. Navy NAVAIR 01-110HCA-1 for alternate fuels. Engine Limits Torque Pressure (PSI) Output RPM Exhaust Gas Temperature (Deg. C) Max. Continuous 46.0 6600 610 30 Min. Operation 48.0 6600 610-625 Maximum Allowable 50.0 (1100 HP) 6600 625 Rotor Limits Power Off Power On Maximum 339 RPM Maximum 324 RPM Minimum 295 RPM Minimum 294 RPM Continuous Operation 294-324 RPM Airspeed Limits Never Exceed 140 knots up to and including 6600 lb G.W. Sea level to 2000 ft. Sideward and rearward flight airspeed limitation 30 knots. Other Limits Flight Hours are counted from takeoff to landing. The helicopters approved under this type certificate are done so under the concept of limited exposure associated with escape from inadvertent ice encounters, and are prohibited against flight into known icing. The helicopters must be re-evaluated if certification to the General Ice protection Airworthiness Regulations is requested. H5NM Page 3 of 7 II - Model UH-1L TH-1L and HH-1K- 9PCLH (cont’d) Maximum Weight 9,500 lb all conditions. C.G. Range Most forward C.G. up to 8150 lb G.W. Fuse Sta. 125.0 Most forward C.G. at 8,500 lb G.W. Fuse Sta. 125.5 / 9,500 lb G.W. Fuse Sta. 126.7 Most aft C.G. up to 7,000 lb G.W. Fuse. Sta. 138.0 Most aft C.G. at 8,500 lb G.W. Fuse. Sta. 134.4 / 9,500 lb G.W. Fuse Sta. 132.0 Empty Weight (+125.0) to (+138.0) C.G. Range Minimum Crew 1 (pilot) for VFR flight. Maximum Passengers (See Note 14.) Fuel Capacity Useable 242 U.S. Gallons Oil Capacity 3.25 U.S. Gallons Rotor Bade and For rigging information refer to U.S. NAVAIR 01-110HCA-2 Control Movements Approved Serial Nos. Surplus UH-1 L, TH-1 L or HH-1 K helicopters as identified in FAA Approved Garlick Helicopters Report No. GHI-TC02, dated April 7, 1995 or later approved revision. DATA PERTINENT TO ALL MODELS Leveling Means Plumb line dropped from slotted plate in cabin roof directly above leveling plate. The leveling plate is located on the cabin floor just inside the left cargo door. Datum 7.6” aft of aircraft nose Certification Basis Federal Aviation Regulations FAR 21.25(a)(2) Amendments 21-1 through 21-56 effective February 8, 1982. Type Certificate No. H5NM issued for the purpose of: (1) Agriculture Operations under FAR 21.25(b)(1) (2) Forest and Wildlife Conservation under FAR 21.25(b)(2) (3) Aerial Surveying Operations under FAR 21.25(b)(3) (4) Patrolling Operations under FAR 21.25(b)(4) (5) External Cargo Operation under FAR 21.25(b)(7) Any alteration to the helicopter for Special Purposes not identified above require further FAA approval and in addition, may require additional noise and/or flight testing. Note: In accordance with FAR 36.1(a)(4), compliance with the nose requirements has been shown for Garlick Models UH-1H. No determination has been made by the Federal Aviation Administration that the noise levels of this aircraft are or should be acceptable or unacceptable for operation at, into, or out of, any airport. General Note: Any subsequent modifications to the helicopters type certified under this Type Certificate are to have the certification basis for that modification established under 14 CFR 21.101 published June 7, 2000 which became effective June 10, 2003. Otherwise non-significant modifications are to meet the requirements of 14 CFR 29 airworthiness standards, transport category, Amendment 1, effective August 12, 1965, plus special conditions for turbine engine installations and 14 CFR 29.1529, Instructions for Continued Airworthiness, Amendment 20, effective September 11, 1980. H5NM Page 4 of 7 DATA PERTINENT TO ALL MODELS (cont’d) Production Basis None. No helicopter may be produced under this approval. (See Note 4) Prior to adding serial numbers to this Type Certificate, each candidate helicopter must undergo a conformity inspection. The conformity inspection will be conducted in accordance with a Type Inspection Authorization, Part 1, or request for conformity that will include as a minimum, the inspections contained in the FAA Rotorcraft Directorate Restricted Category Conformity document dated September 25, 2001 or later FAA approved revisions. Equipment The basic required equipment as prescribed in the applicable airworthiness regulations (see Certification Basis) must be installed in each type helicopter for certification. In addition the Flight Manual U.S. NAVAIR 01 110HCA-1 is required. NOTES NOTE 1. Current weight and balance information including list of equipment in certificated empty weight and loading instructions must be in each helicopter at time of original airworthiness certification and at all times thereafter. NOTE 2. The following placards must be prominently displayed in the cockpit in full view of the pilot. MODEL UH-1E, UH-1L, TH-1L, and HH-1K OPERATING LIMITATIONS GROSS WEIGHT 7500 8500 9500 AIRSPEED POWER ON 140 130 125 DECREASE AIRSPEED 3 KNOTS/1000 FT. ABOVE 3000 FT. POWER ON 314 TO 324 RPM (6400 TO 6600 RPM) POWER OFF 300 TO 339 RPM (6100 TO 6900 RPM) TURN ON ENGINE DE-ICE WHEN OPERATING IN VISIBLE MOISTURE AT TEMPERATURES BELOW 32°F (0°C). THIS HELICOPTER MUST BE OPERATED IN ACCORDANCE WITH THE RESTRICTED CATEGORY OPERATING LIMITATIONS OF FAR 91.39 AND WITH THE LIMITATIONS NOTED IN U.S. NAVY NAVAIR 01110HCA-1. In addition, a placard identifying the specific type of T53 Series engine installed must be installed in view of the pilot. NOTE 3. The helicopter(s) must be serviced, maintained and inspected in accord ance with the documents specified in Garlick Helicopters Inc. Instructions for continued Airworthiness Report, GH -H5NM- CA1 dated 10-22-02 or later accepted version. Or other FAA accepted inspection program. The Garlick Helicopters Inc. Report GH-H5NM-CA1 is part of the Garlick Helicopters Inc. Instructions for Continued Airworthiness. Retirement times and component overhaul intervals are listed in FAA Approved Airworthiness Limitations Section (Section II of the above document) dated 10-22-02 or later approved version. NOTE 4. In addition to the standard helicopter requirements, the following additional data and/or helicopter configuration requirements must be met for each individual model UH-1E, UH-1L, TH-1L, and HH-1K helicopter upon application for an original Special Airworthiness Certificate: H5NM Page 5 of 7 NOTES (cont’d) a) A completed application for airworthiness certificate, FAA Form 8130-6 that has correctly identified the type certificate holder’s helicopter and its intended special purpose(s). b) Written confirmation from the certifying office that the affected serial number has been added to Garlick Helicopters Inc. type certificate. c) The application for airworthiness certification and the helicopter’s registration certification match the information on Garlick Helicopter, Inc. data plate. d) Each helicopter must satisfactorily pass inspections for conformity with U.S. Navy Document NAVAIR 01-0110HCA-2, possible hidden damage, and for workmanship and materials used in making any repairs and/or alterations. GHI Document GH-H5NM-CA1 Instructions for Continued Airworthiness dated 10-22-02, or later accepted revision, and TCDS H5NM dated Oct 22, 2002 or later approved revision. e) The Maintenance, overhaul, and modification records of each helicopter must be reviewed for changes made by the military services that may affect the airworthiness of the aircraft. Modifications and changes of equipment, which may affect the safety or performance of the helicopter must be approved by the Federal Aviation Administration. f) FAA Airworthiness Directives listed in FAA Approved GHI AD Review list for Certification and continued Airworthiness dated 5-14- 01, as revised, for UH1 series helicopters, Lycoming T53-L-11 and L-13 Series engines and aircraft appliances must be reviewed for applicability and complied with accordingly. g) The U.S. Navy Technical Directives listed in Hercules Report Number 1401Y dated October 24, 1985, must be complied with. NOTE 5. This aircraft is prohibited from carrying cargo for compensation or hire, carriage of cargo is limited to such cargo that is incidental to the aircraft owner / operator’s business which is other than air transportation. (This note applies to aircraft that have the Special Purpose, “Carriage of Cargo”.) NOTE 6. Restricted Category aircraft may not be operated in a foreign country without the expressed written approval of that country. NOTE 7. The following note must be placed under "exceptions" on all Export Certificates of Airworthiness for this aircraft. "This aircraft is type certificated in the restricted category and has not been determined to meet the international standards concerning the airworthiness of aircraft as provided for in Annex 8 to the Convention of International Civil Aviation (Chicago Convention) of December 7, 1944. NOTE 8. Military to Civil or Military to Military engine changes are allowed provided the replacement engine is of the same make and model as identified in this TCDS. The military or civil replacement engine must have proper military or civil records and have the applicable FAA Airworthiness Inspection accomplished and is in an airworthy condition. NOTE 9. This approval applies to the basic United States Navy UH-1E, UH-1L, TH-1L, and HH-1K helicopters modified in accordance with Hercules Report Number 1400Y dated January 2, 1985. NOTE 10. Torque pressure output by the engine torque sensing system varies with individual engines. A calibration of this value is required on each engine and the value corresponding to take -off power is stamped on the engine data plate. NOTE 11. Helicopters that do not have documentation showing they were surplus from an Armed Force of the United States are not eligible for certification under this type certificate. Engines and appliances that do not have documentation showing they were surplus from an Armed Force of the United States are not eligible for installation on a helicopter under this type certificate. H5NM Page 6 of 7 NOTES (cont’d) Helicopter(s), engine(s), and appliances that have records indicating time-in-service by a foreign military or a foreign government will be presumed to be ineligible for certification or installation under this type certificate. This presumption maybe overcome by the applicant substantiating, to the satisfaction of the FAA, through documentation, tests, computations, evaluations, analyses, or other means or methods that the helicopter, engine, or appliance, during its time-in-service by the foreign military or foreign government, was maintained to an extent and in a manner equal to that of an Armed Force of the United States. NOTE 12. Gas producer speed, as shown under "Engine Limits", are maximum permissible speeds. The gas producer speed for rated power output varies with individual engines and must be determined during engine calibration and stamped on the engine data plate. The rated gas producer speed shown on the temperature limit placard installed on the instrument panel must correspond to the data plate gas producer speed. Gas producer speed limits also vary with OAT in accordance with the schedule as shown on the Temperature Limit (GO-NO-GO TAKE-OFF) placard on the instrument panel. NOTE 13. Lycoming engine models T53-L-11 (s/n suffix “A”), T53-L-11B and T53-L-11C are approved for use as alternate engines under this Type Certificate. Engines Identified above will be maintained on a 1200 hr. (T53-L-11C, 1800 hr.) overhaul schedule and in accordance with the U.S Military maintenance, overhaul and parts manuals, listed in Report GH-H5NM-CA1 applicable to that engine. The Model UH-1 E helicopter is eligible with Lycoming T53-L-13/-13A/-13B, engine when installed in accordance with NAVAIR 01-110HCA-2 installation instructions and when the engine instruments are marked according to the U.S. Navy NAVAIR 01-110HCA-1 instrument markings 'for the respective engine on the Models UH-1 L, TH-1 L and HH-1 K helicopters. Hercules Flight Manual Supplement Number UH-1 E-13 must be included with the Flight Manual. NOTE 14. Ref. FAR Part 91.313 subparagraphs (b) and (c) (b) No person may operate a restricted category civil aircraft carrying persons or property for compensation or hire. For the purposes of this paragraph, a special purpose operation involving the carriage of persons or materials necessary for the accomplishment of that operatio n. Such as crop dusting, seeding, spraying, and banner towing (including the carrying of required persons, or materials to the locations of that operation), and an operation for the purpose of providing flight crewmember training in a special purpose operation are not considered to be the carrying of persons or property for compensation or hire. (c) No person may be carried on a restricted category civil aircraft unless: (1) He is a flight crewmember, (2) He is a flight crewmember trainee; (3) He performs an essential function in connection with a special purpose operation for which the aircraft is certificated; or (4) He is necessary for the accomplishment of the work activity directly associated with that special purpose. NOTE 15. Lycoming engine models T53-L-13, T53-L-13A, are approved for use as alternate engines under this Type Certificate. Military engines Identified above will be maintained on a 2400 hr. overhaul schedule and in accordance with the U.S Military maintenance, overhaul and parts manuals, listed in Report GH-H5NM-CA1 applicable to that engine. The Models UH-1L, TH-1L and HH-1K helicopters are eligible with Lycoming T53-L-11 (SN. Suffix A), -11B, -11C, Series engines when installed in accordance with NAVAIR 01-110HCA-2. Installation Instructions and when the engine instruments are marked according to the U.S. Navy NAVAIR 01-110HCA1 instrument markings for the respective engine on the Model UH -1E helicopter. Hercules Flight Manual Supplement Number UH/TH-1 L-11 must be included with the Flight Manual. H5NM Page 7 of 7 NOTES (cont’d) NOTE 16. The T53-L-11 engine is rated to an output torque equivalent to 1100 horsepower at 6,600 RPM for takeoff and 900 horsepower at 6,600 RPM for continuous operation. The T53 -L-13 gas turbine powerplant in these installations is rated to an output torque value equivalent to 1400 horsepower at 6,600 RPM take-off and 1250 horsepower continuous; however the transmission is restricted to a maximum of 1100 horsepower at 6,600 RPM (50 PSI). The T53-L-13 and T53-L-13A engines are limited to 97 percent gas generator speed or 24,400 RPM. The aircraft equipped with the T53 - L-13B engines are not limited by this powerplant restriction; therefore, the pilot must ascertain which engine is installed prior to start. Performance charts have been included in NAVAIR 01- 110HCA-1 to cover this reduction in power. NOTE 17. Carriage of hazardous materials is prohibited unless compliance is shown with applicable regulations in Code of Regulations Title 49, Part 175. NOTE 18. Alternate and emergency fuels are listed in U.S. Navy NAVAIR 01-110HCA-1. Some limitations apply for the use of certain alternative fuels. These limitations are listed in the Overhaul Manual. NOTE 19. Any Alteration to the type design of this aircraft may require Instructions for Continued Airworthiness (ICA’s). Changes to the Type Design by means of a Supplemental Type Certificate (STC) requiring ICA’s or changes to existing ICA’s must be submitted and reviewed by the Fort Worth Aircraft Evaluation Group (FTW-AEG). Type Design Changes by means of a Field Approval that require ICA’s must have those ICA’s reviewed by the Flight Standards District Office (FSDO) managing the Field Approval or the FTW-AEG. …END… ``` ## ADs (25, in force first) - [AD 2024-19-17](https://openairdocs.org/ad/2024-19-17): Rotorcraft flight control · Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N… (STC SR03408CH). Effective Oct 11, 2024 - [AD 2022-20-14](https://openairdocs.org/ad/2022-20-14): Main Rotor Gearbox · Bell Textron 204B, 205A, 205A-1 and 20 more. Effective Dec 27, 2022 - [AD 2022-22-12](https://openairdocs.org/ad/2022-22-12): Nose/Tail Landing Gear Structure/Axle · Replacement crosstubes P/N D212-664 (Dart Aerospace STC SR01298NY). Effective Nov 22, 2022 - [AD 2022-05-10](https://openairdocs.org/ad/2022-05-10): Cabin Equipment/Furnishings · Airbus Helicopters AS332L, AS332L1, AS332L2 and 57 more. Effective Apr 20, 2022 - [AD 2022-06-05](https://openairdocs.org/ad/2022-06-05): Main Rotor System · WSH HH-1K, TH-1F, TH-1L and 11 more. Effective Mar 16, 2022 - [AD 2021-15-14](https://openairdocs.org/ad/2021-15-14): Rotorcraft Tail Boom · California Department of Forestry UH-1H, UH-1F, TH-1L and 39 more. Effective Aug 30, 2021 - [AD 2014-03-10](https://openairdocs.org/ad/2014-03-10): Tail Rotor Control System · JJASPP Engineering Services UH-1H, UH-1F, TH-1L and 35 more. Effective Mar 26, 2014 - [AD 2013-13-06](https://openairdocs.org/ad/2013-13-06): Main rotor head · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 10, 2013 - [AD 2013-13-14](https://openairdocs.org/ad/2013-13-14): Main Rotor Head · JJASPP Engineering Services UH-1H, UH-1F, TH-1L and 33 more. Effective Jul 24, 2013 - [AD 2012-17-10](https://openairdocs.org/ad/2012-17-10): Main Rotor Blades · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 28, 2012 - [AD 2012-14-12](https://openairdocs.org/ad/2012-14-12): Tail Rotor Blades · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 4, 2012 - [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 2006-19-05](https://openairdocs.org/ad/2006-19-05): Tail rotor (T/R) slider · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Oct 16, 2006 - [AD 2002-20-01](https://openairdocs.org/ad/2002-20-01): TT strap · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 34 more. Effective Nov 6, 2002 - [AD 2002-13-51](https://openairdocs.org/ad/2002-13-51): Tail Rotor (T/R) Grip · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 34 more. Effective Aug 19, 2002 - [AD 2002-01-31](https://openairdocs.org/ad/2002-01-31): Retirement Index Number (RIN) for Masts · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 36 more. Effective Mar 8, 2002 - [AD 2000-15-21 R1](https://openairdocs.org/ad/2000-15-21-R1): Main Rotor Mast Assemblies · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 33 more. Effective Nov 22, 2000 - [AD 99-25-12](https://openairdocs.org/ad/99-25-12): Tailboom Vertical Fin Spar · California Department of Forestry UH-1H, UH-1F, TH-1L and 31 more. Effective Jan 11, 2000 - [AD 99-07-15](https://openairdocs.org/ad/99-07-15): Tail Rotor Yoke · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 33 more. Effective May 3, 1999 - [AD 97-01-06](https://openairdocs.org/ad/97-01-06): Tail Rotor Slider · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 32 more. Effective Feb 13, 1997 - [AD 96-12-26](https://openairdocs.org/ad/96-12-26): Clean and Inspect Tail Rotor Blade · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 23, 1996 - [AD 2021-15-52](https://openairdocs.org/ad/2021-15-52) (historical): Main Rotor System · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 39 more. Effective Aug 13, 2021 - [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 2000-15-21](https://openairdocs.org/ad/2000-15-21) (historical): Rotor Mast (Mast) Assemblies · AST UH-1F, HH-1K, TH-1F and 10 more. Effective Aug 24, 2000 - [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 ## Registered aircraft by registry model (OpenAirDocs) - [Garlick Helicopters HH-1K](https://openairdocs.org/model/garlick-helicopters-hh-1k): 2 aircraft (registry code 3740007) ## STCs approved under this data sheet (13) - [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 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 SR09167RC](https://openairdocs.org/stc/SR09167RC): Replacement of tail rotor control roller chain.. Midwest Aerospace TC LLC - [STC SR09177RC](https://openairdocs.org/stc/SR09177RC): Modification of the vertical fin spar. Midwest Aerospace TC LLC - [STC SH5690NM](https://openairdocs.org/stc/SH5690NM): Installation of Advanced Technology Aircraft Co. engine barrier filter.. WSH, 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 SR01742NY](https://openairdocs.org/stc/SR01742NY): Installation of extended height landing gear.. Dart Aerospace Limited - [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 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 --- 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.