# STC SA147NW - Type: Supplemental type certificate - Status: Current, Amended - Holder: Machen Inc, United States - Description: Installation of a Franklin 6AS-350-A engine, McCauley 2A34C201/90DA-12 propeller, Bendix-Stromberg PS-5C Carburetor, modified forward fuselage, single (center located) control column with electric propeller pitch control electric throttle control, and electric elevator trim, inverted fuel and oil system, retractable tail wheel assembly, aileron centering spring, modified engine baffles, engine cowl flap, modified elevator trim tab, landing gear wheel-well doors, and a modified center section wing fairing - Applied: June 17, 1973 - Status date: February 3, 1975 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS A-766](https://openairdocs.org/tcds/A-766) - Certificate PDF: https://openairdocs.org/files/sha256/74/a8/74a8579f35e4cdf827879316085566c40787480a9c0a339c9332d98db4da8fb3 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3C7432BDF37B8FE186257AE100554FDD.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA147NW ## ADs that name it (0) None. ## Approved models (1) - Swift Museum Foundation Inc. GC-1B ([TCDS A-766](https://openairdocs.org/tcds/A-766)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA2L75W This certificate issued to: . Machen, INC. Part 4a of the CiviI Air Regulations. Original Product -- Type Iserificate Number: 1-766 Make: Universal (Globe) Model: GC-1B 2A34C201/90DA-12 propeller; Bendix-Stromberg PS-5C Carburetor; modified forward Description of Type Design Change: Installation of a Franklin 6A5-350-A engine; McCaules fuselage; single(center located) control colum with electric propeller pitch contro electric throttle control, and electric elevator trim; inverted fuel and oil system : retractable tail wheel assembly; aileron centering spring; modified engine baffles; engine cowl flap; modified elevator trim tab; landing gear wheel-well doors; and a modified center section wing fairing in accordance with Machen, Inc. Installation Instructions No. 1, 2, 4, 5, 9, and 10. This design change includes a takeoff gross weight increase to 1970 Pounds. Limilations andtundilins: Data pertaining to this modification are considered inadequat for duplication in other aircraft. This approval is limited to the installation in Universal Model GC-1B, Serial Number 230 only. A copy of this Certificate, Addendum No. SAl47NW and Machen, Inc. Installation Instructions shall be maintained of the permanent records for the modified aircraft. as part Date of Application: June 17, 1973 Date Reissued: Date of Issuance: December 31, 1974 Date Amended: February 3, 1975 EDERAL AVIATION I rigation of the diginignalen ісла (Signature ) CHIN STRATO Chief, Engineering and Manufacturing Branch (Title) 47 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SAIL TAW Supplemental Type Certificate ADDENDUM NO. SALLZIW The conditions and limitations of the original specification apply except as follows: of this Addendum shall be maintained as part of the modified aircraft meets the airworthiness requirements of Civil Air Regulation 4a. A copy prescribes conditions and limitations under which the STC was issued and permanent records. This Addendun, which is part of Supplemental Type Certificate No. SAL47NW, Supplemental Type Certificate HOLDER: Machen, Inc. I. GLOBE CC-B (LANDPLANE -NORMAL CATEGORY) AS MODIFIED BY STC SAILINW Engine: Franklin 6AS-350-A Fuel: 100/130 Minimum grade aviation gasoline Engine Limits: Takeoff (1 Min.) 2800 rpm @ 42.0" Hg. METO 2700 rpm @ 37.0" Hg. Propeller & Limits: McCauley 2A34C201/90DA-12 Diameter: 78" Maximum Weight: C. G. Range: 1970 Pounds (22.6) to (+26.0) @ 1970 Pounds Da tum: Oil Capacity: Fwd. Face of firewall at bottom 8.8 Quarts Powerplane Instrument Markings: Oil Temperature: Green Arc 1200 to 250° F - Normal operating range Yellow Arc 60° to 120° F - Caution Red Line 250° F - Maximum Oil Pressure: Green Arc 55 to 80 psi - Normal operating range Yellow Arc 25 to 55 psi - Caution Red Line 25 psi Min, - 80 psi Max. **FAA FORM 8110-2-1 (10-69)** **PAGE 3 OF 4 PAGES C FAA AC 73-2651** STC SA147NW Tachometer: Green Arc 500 to 2700 rpm - Normal operating range Red Line 2800 rpm - Maximun Cylinder Head Temperatures: (Well-Type thermocouple) Green Arc 2000 to 400° F - Normal range Serial Number: 230 Only Note: Current weight and balance report including list of equipment in the certified empty veight must be in the aircraft. Note: 2. In addition to the placards and markings required by the Type Certificate Data Sheet A-766, Note 2, apply the following: Placards: (3) It is the responsibility of the pilot to ensure operation within the approved weight and center of gravity limits at all times. - END - Tage I of l Pages ## Every issue (1) - February 3, 1975: Amended, Current. [certificate](https://openairdocs.org/files/sha256/74/a8/74a8579f35e4cdf827879316085566c40787480a9c0a339c9332d98db4da8fb3) --- 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.