# STC SA788NW - Type: Supplemental type certificate - Status: Current, Issued - Holder: Bombard Charles A, United States - Description: Installation of a Continental engine and a McCauley propeller - Applied: January 11, 1979 - Status date: June 14, 1979 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS A-767](https://openairdocs.org/tcds/A-767) - Certificate PDF: https://openairdocs.org/files/sha256/67/d3/67d3b73377f3e2d40d795212159038c440fb9169fee85bf262a87c5c0e78e8b9 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/17638F4602D030F586257A3E0062D8EF.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA788NW ## ADs that name it (0) None. ## Approved models (1) - Univair Aircraft Corporation 108-1 ([TCDS A-767](https://openairdocs.org/tcds/A-767)) ## 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: SA788NW This certificate issued to: Charles A. Bombard Purt 3 of the CiViI Air Regulations: Original Product -Type berlificate Number: A-767 Make: Univair (Stinson) Model: 108-1 Description of Type Design Change: Installation of a Continental 0-170-A engine and a McCauley 2A34C66-N/90AT-8 propeller in accordance with photographs 1 through Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Univair 108-1, Serial Number 108-1737 only. A copy of this Certificate and Addendum No. SA788NW shall be maintained as part of the permanent records for the modified aircraft. JUN 1 4 1979 Date Amended: FEDERAL AVIATION hario EJihroeder By direction of the Admir TO MINISTRATO Chief, Engineering and Manufacturing Branch (Title) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) JUN 1 4 1979 Number: SA788N Supplemental Type Certificate ADDENDUM NO. SA788NW The conditions and limitations of Type Certificate Data Sheet Number A-767 apply except where superseded by the following: Supplemental Type Certificate Data Sheet, which is part of STC SA788NW, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Civil Air Regulations: Supplemental Type Certificate HOLDER: Charles A. Bombard I. UNIVAIR (STINSON) 108-1 (LANDPLANE-NORMAL CATEGORY) AS MODIFIED BY STC SA788NW Engine: Continental 0-470-A Engine Limits: 225 Hp @ 2600 rpm Propeller and McCauley 2A34C66-N/90AT-8 Propeller Limits: 230 Hp @ 2650 rpm with propeller length from 80" to 88" inclusive. Engine must have one 5th order and one 6th order damper installed for use with the above propeller. All other limits are the same as shown in Data Sheet A-767. Placard: Place a placard in full view of the pilot to read: 2600 RPM AND 32" HG FOR ONE MINUTE CLIMB 2350 RPM AND 23.5" HG AND 110 MPH CLIMB THERE- AFTER - END - **FAA FORM 8110-2-1 (10-69) PAGE 3 OF 3 PAGES FAA AC 73-2651** ## Every issue (1) - June 14, 1979: Issued, Current. [certificate](https://openairdocs.org/files/sha256/67/d3/67d3b73377f3e2d40d795212159038c440fb9169fee85bf262a87c5c0e78e8b9) --- 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.