# STC SA2086NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Rocky C Younger, United States
- Description: Installation of a Lycoming O-360-A2F and a Sessenich 76EM855-O-60
- Applied: March 9, 1983
- Status date: April 21, 1983
- Product: Aircraft
- Certification basis: Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/ef/db/efdbf5c3724e2892ca04a6fdb6fde289759903accd46abba985c4c9976de3d3f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A5D14A1CD9B75FD9862579F0006213E8.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2086NM

## 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 Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA20861M This certificate issued to: ROckY C. Younger Certifies that the change in the type design for the fellowing product with the limitations and conditions therefor as specified heron meets the wi Vincierequirements ef Purt 3 & the Civil Air Regulations Original Product -Type Cuntificato Number: 3A13 Make: Cessna Model: 172K Description of Type Design Change: . Installation of a Lycoming 0-360-A2F and I Sensenich 76EM8S5-0-60 per FAA sealed Mr. Rocky Younger Photograpn thru 5.

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 Model 172K, Serial Number 17257816 only. A copy of this Certificate shall be maintained as part of the permanent records for the modified aircraft.

Tute f afflication: 03/09/83 Date Reissued:

04/21/83 Date Amended:

FEDERAL ANTATION By Direction of the Administrator .

(SignatureT Manager, Seattle Aifcraft Certification Office

her attente wine ! chered in accordance with FAR 21.47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) April 21, 1983 Number SA2085NM Supplemental Type Certificate ADDENDUM NO. SA2086NM The conditions and limitations of Type Certificate Data Sheet Number 3A13 apply except where superseded by the following:

Supplemental Type Certificate Data Sheet, which is part of STC SA2086NM, prescribes the conditions and limitations under which the STC was issued meets the airworthiness requirements of the Civil Air Regulations.

Supplemental Type Certificate HOLDER: Rocky C. Younger CESSNA 172K 4 PCL-SM (NORMAL CATEGORY) AS MODIFIED BY STC SA2086NM Engine: Lycoming 0-360-A2F Engine Limits: 180 Hp @ 2700 rpm (Takeoff), full throttle 2700 rpm (Maximum Continuous) full throttle Fuel: 100/130, minimum octane aviation gasoline Propeller and Propeller Limits: Sensenich 76EM8S5-0-60 Diameter: 76" maximum; 76" minimum Placards and Markings: Install placard in full view of the pilot to read:

**AVOID CONTINUOUS OPERATION BETWEEN 2150 AND 2350 RPM.**

Change octane markings by fuel tank ports to read:

**MIN. GRADE AVIATION GASOLINE 91/96 OR 100/130**

- END -

47.

**PAGE 3 OF 3PAGES**

## Every issue (1)

- April 21, 1983: Issued, Current. [certificate](https://openairdocs.org/files/sha256/ef/db/efdbf5c3724e2892ca04a6fdb6fde289759903accd46abba985c4c9976de3d3f)

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