# STC SA7NW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Coleman T. Wagner, United States - Description: Installation of Continental C-85-8, -8F, -12, -12F engine and Sensenich M74CK propeller or McCauley1A90CF or 1B90CM propeller. - Applied: April 28, 1972 - Status date: July 8, 2009 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS A-728](https://openairdocs.org/tcds/A-728), [TCDS A-751](https://openairdocs.org/tcds/A-751) - Certificate PDF: https://openairdocs.org/files/sha256/4f/de/4fde02e2bd1d6bf3d1411e2d96538b1a1b93a82b42901fb45d09155e9ca471e6 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7FBE7E4852625DD88625760000707193.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA7NW ## ADs that name it (0) None. ## Approved models (4) - Aeronca Aircraft Corporation 65-TAC (Army L-3E) ([TCDS A-728](https://openairdocs.org/tcds/A-728)) - Aeronca Aircraft Corporation 65-TC (Army L-3J) ([TCDS A-728](https://openairdocs.org/tcds/A-728)) - Aeronca Aircraft Corporation O-58B (Army L-3B) ([TCDS A-751](https://openairdocs.org/tcds/A-751)) - Aeronca Aircraft Corporation O-58B (Army L-3C) ([TCDS A-751](https://openairdocs.org/tcds/A-751)) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. P.O. Box 3 Clark, SD 57225 Part 4 a of the Civil Air Regulations, dated April 7, 1950, and Amendment 4a-1. Original Product--Type Certificate Number : A-751 A-728 Installation of Continental C-85-8, -8F, -12, or -12F engine and Sensenich M74CK propeller or McCauley 1A90CF or 1B90CM propeller in accordance with Robert E. Smith Report Number 49015-A, dated April 10, 1972, or later FAA approved revision. Operation at a gross weight of 1300 pounds is approved. Compatibility of this design change with previously approved modifications must be determined by the installer. A copy of this certificate or later FAA approved revision and Robert E. Smith Report 49015-A, must be maintained as part of the permanent records for the modified aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. (Limitations and Conditions continued on page 3 and 4) Make : Aeronca Aeronca Model : 0-58B 65-TC, 65-TAC Date of application : April 28, 1972 Date of issuance : September 29, 1972 Date reissued : March 14, 1989; July 8, 2009 Date amended : May 17, 1978; May 3, 1979 ( Signature) Thaddeus D. Krolicki, Jr. Manager, Propulsion Branch Chicago Aircraft Certification Office ( Title) FAA FORM 8110-2-1(10-69) PAGE 3 of 4 PAGES Number SA7NW Limitations and Conditions (Cont.) The conditions and limitations of Aircraft Specification No. A-751 and A-728 apply as follows: This STC Continuation Sheet, which is part of the STC SA7NW, prescribes conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Civil Air Regulations. A copy of this Continuation sheet and STC SA7NW must be maintained as part of the permanent records for the modified aircraft. SUPPLEMENTAL TYPE CERTIFICATE HOLDER: Colman T. Wagner I. Aeronca Model 0-58B, 65-TC, 65-TAC as modified by STC SA7NW Engine: Continental C-85-8, -8F, -12, -12F Fuel: 80/87 octane minimum grade aviation gasoline Engine Limits: For all operations – 2575 RPM (85 HP) Propeller and Propeller Limits: 1. Sensenich M74CK-2 Diameter: 72 ″ maximum; 70″ minimum Static Limits: 2450 RPM maximum 2200 RPM minimum 2. McCauley 1A90CF or 1B90CM Diameter: 71 ″ maximum; 69 ½″ minimum Static Limits: 2450 RPM maximum 2350 RPM minimum C.G. Range: (+13.5) to (+17.8) NOTE: C.G. applies to all 3 models for front seat solo, max. gross weight 1300 lbs., and max. baggage 10 lbs. at station +60.0. For all other normal conditions, see TCDS A-728 and A-751. Empty C.G. Range: None Maximum Weight: 1300 ibs. (see NOTE under Center of Gravity Range ) Maximum Baggage: 10 lbs. at stati on +60.0 (see NOTE under Center of Gravity Range) Oil Capacity: 1 gallon at Station -38.0 Serial Nos. Eligible: See Aircraft Specifications A-751 and A-728 Engine and Instrument Markings: Tachometer – Radial Red Line 2575 RPM Oil Temp. Gauge – Radial Red Line 225ºF Cylinder Head Temp. Gauge (optional) – Radial Red Line 540ºF Oil Pressure Gauge – Radial Red Line 40 psi max. - Radial Red Line 30 psi min. - Green Are 30 to 40 psi normal FAA FORM 8110-2-1(10-69) PAGE 3 of 4 PAGES Number SA7NW Limitations and Conditions (Cont.) Placards: 1. In full view of pilot: **MAXIMUM GROSS WEIGHT 1300 LBS.** 2. In full view of pilot: **OCCUPY FRONT SEAT WHEN FLYING SOLO** 3. At the fuel filler cap: **80/87 MINIMUM GRADE CAPACITY 12 GALLONS** 4. At the oil filler cap: **OIL CAPACITY 1 GALLON** NOTE: Current Weight and Balance Report and list of equipment included in certificated weight empty must be in the aircraft at the time of certification and at all times thereafter. -END- FAA FORM 8110-2-1(10-69) PAGE 3 of 4 PAGES Number ST00XXXCH-D Date of Issuance: XXXXXX Date Amended: XXXXXX ## Every issue (1) - July 8, 2009: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/4f/de/4fde02e2bd1d6bf3d1411e2d96538b1a1b93a82b42901fb45d09155e9ca471e6) --- 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.