# STC SA5791NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Douglas W Rodrigues, United States
- Description: Installation of a Lycoming O-360-A1D engine and a McCauley 2D36C14 78KM-4 propeller
- Applied: June 25, 1987
- Status date: December 9, 1992
- Product: Aircraft
- Certification basis: Part 21
- Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/56/85/568526e6762cff6743e84cf7cf2a20ea4483301597c9c79cef7c6a7052e5e70f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/652792E1D6B2F672862579C2006A3EFD.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA5791NM

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 175A ([TCDS 3A17](https://openairdocs.org/tcds/3A17))

## 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: SA5791NM This certificate issued to: Douglas W. Rodrigues 3603 Neil Road Reno, Nevada 89502 Pur 3 of the CiVil Air Regulalions: dated May 15, 1956 Original Product - Type bertificate Number: 3A17 Make: Cessna Model: 175A Description of Type Design Change: Installation of a Lycoming 0-360-AID engine and a 1cCauley 2D36C14 78KM-4 propeller in accordance with Doug Rodrigues photographs l through 12, dated March 24, 1992, and Supplemental Drawings #1, 2, and 3 dated January 5, 1988.

Limitations and Conditions: Data pertaining to this modification are considered inadequate for other aircraft. This approval is limited to the installation in Cessna Model 175A aircraft, Serial No. 56393, R/N N6893E, only. A copy of this Certificate and Continuation Sheet dated December 9, 1992, must be maintained as part of the permanent records for the modified aircraft.

SA5791NM The Conditions and Limitations of the Type Certificate Data Sheet (TCDS) 3A17 apply except when superseded by the following:

Supplemental Type Certificate Data Sheet, which is a part of STC SA5791NM prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Federal Air Regulations.

Supplemental Type Certificate HOLDER: Douglas W. Rodrigues Model 175A, Skylark, (Normal Category) as modified by STC SA5791NM Engine: Lycoming 0-360-A1D Fuel: 91/96 or 100/130 minimum grade aviation gasoline Engine Limits: For all operations 2700 rpm (180 hp) Propeller and Propeller Limits: McCauley 2D36C14 Blade No. 78KM-4 Diameter 74" Maximum 72" Minimum Placards:

Near Fuel Tank Fillers:

"Fuel 91/96 or 100/130 Minimum Grade Aviation Gasoline" Cap 26 U.S. gal.

Near Tachometer:

"Avoid continuous operation while descending between 2250 and 2550 rpm with manifold pressure settings below 15 inches mercuryi Gauge Markings:

Tachometer: 2700 rpm (redline) Oil Temperature Gauge: 245 F (redline) Oil Pressure Gauge: Minimum 25 psi (redline) Maximum 100 psi (redline) Normal 60 to 90 psi (green arc) Cylinder Head Temperature: 500 F (redline)

- END-

**FAA FORM 8110-2-1 (10-69) PAGE 3 OF 3 PAGES**

## Every issue (1)

- December 9, 1992: Issued, Current. [certificate](https://openairdocs.org/files/sha256/56/85/568526e6762cff6743e84cf7cf2a20ea4483301597c9c79cef7c6a7052e5e70f)

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