# STC SA517NW - Type: Supplemental type certificate - Status: Current, Issued - Holder: Perks, George, United States - Description: Installation of a Lycoming engine, McCauley propeller - Applied: July 7, 1977 - Status date: November 18, 1977 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12) - Certificate PDF: https://openairdocs.org/files/sha256/f2/a1/f2a1fe23736b96fbb79951fb266b42b7370e565964aa7157b308086b0741aef2 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0A941B9A6CBD13CD86257A45006C31F3.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA517NW ## ADs that name it (0) None. ## Approved models (1) - Cessna Aircraft Company 172K ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America STC Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA517Nw This certificate issued to: GEORGE PERKS Part 3 of the Civi 1 Air Regulations, as Amended by 3-1 Through 3-12 Original Product -Type bertificate Number: 3A12 Make: Cessna Model: 172K Description of Type Design Change: Installation of a Lycoming 0-320-D2G engine (160 HP @ 2700 rpm), McCauley 1C172/MTM7653 propeller, and associated systems in accordance with George Perks photographs 1 through 3. NOTE: This is a replacement of a 0-320-E2D rated at 150 HP @ 2700 rpm. Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Cessna 172 K, Serial Number 17257390 only. A copy of this Certificate and Addendum SA517NW shall be maintained as part of the permanent records for the modified aircraft. Date of Application: JUly 7, 1971 Date Reissued: Date of Issuance: November 18, 1977 Date Amended: FEDERAL AVIATION Chants Citineder (Signature ) TOMINISTRA Chief, Engineering and Manufacturing Branch (Title) 47 FAA FORM 8110-2 (10-68) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) NOV 1 8 1977 Number: SA517NW Supplemental Type Certificate ADDENDUM NO. SA517NW The conditions and limitations of the original specification apply except as follows: This Addendum, which is part of the Supplemental Type Certificate No. SA517NW pre- if it A regulation we are and not there scribes conditions and limitations under which the STC was issued and meets the airworthiness requirements of Civil Air Regulation 3. Supplemental Type Certificate HOLDER: George Perks CESSNA MODEL 172K, 4PCLM (NORMAL CATEGORY) AS MODIFIED BY STC SA517NW Engine: Lycoming 0-320-D2G Fuel: 91/96 or 100/130 minimum grade aviation gasoline Engine Limits: Take Off (5 Min.) 2700 rpm (160 HP) @ Sea Level Maximum Continuous Power - 2500 rpm Propeller Limits: McCauley 1C172/MIM7653 Diameter: 76" maximum; 74" minimum Static Limits: maximum 2360 rpm minimum 2260 rpm Placards: None C. G. Range: (+38.5) to (+47.3) at 2300 1bs. Maximum Weight: 2300 1bs. Datum: Lower Front Face of Firewall Oil Capacity: 8 Quarts Instrument Markings: Oil Temperature: 245 F Oil Inlet (Red Line) Oil Pressure: 60 - 90 psi (Green Arc) Cylinder Head Temperature: F Bayonet Thermocouples (Red Line) Serial Number Eligible: 1725739 Only 47. **PAGE 3 OF 4 PAGES C FAA AC 73-2651** NOV 1 & 1977 STC SA517NW NOTE 1: Current weight and balance report including list of equipment in the certified empty weight must be in the aircraft. NOTE 2: In addition to the Placards and Markings required by Type Certificate Data Sheet 3A12, Note 2, apply the following: a. Adjacent to fuel filler cap: **CAUTION - USE 100/130 OCTANE** **FUEL OR HIGHER ONLY** b. Adjacent to or in close proximity to the aircraft identification plate: **LYCOMING 0-320-D2G ENGINE INSTALLATION, STC SA517NW** c. The following placard is to be in front and in full view of the pilot: ENGINE LIMITS TAKE OFF (5 MIN.) - 2700 RPM MAXIMUM CONTINUOUS POWER - 2500 RPM NOTE 3: With the described engine and propeller installation, performance will be at least equal or better than that given in the original FAA Approved Flight Manuals for the Cessna 172 K airplane. - END - Page 4 of 4 Pages ## Every issue (1) - November 18, 1977: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f2/a1/f2a1fe23736b96fbb79951fb266b42b7370e565964aa7157b308086b0741aef2) --- 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.