# STC SE5177NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Ritter Cams Inc, United States
- Description: Replacement camshaft P/N629726A3 with camshaft P/N 32122-2.
- Applied: February 26, 1990
- Status date: February 27, 1992
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E5CE](https://openairdocs.org/tcds/E5CE)
- Certificate PDF: https://openairdocs.org/files/sha256/5d/bc/5dbc11b48f30a82456416682d29ac3d2bc8179c6d66ad3a11e2fb62ed9b34417
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/88E644136AF6C763862579C1005CF7D8.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SE5177NM

## ADs that name it (0)

None.

## Approved models (3)

- Continental Motors IO-520-B ([TCDS E5CE](https://openairdocs.org/tcds/E5CE))
- Continental Motors IO-520-BA ([TCDS E5CE](https://openairdocs.org/tcds/E5CE))
- Continental Motors IO-520-BB ([TCDS E5CE](https://openairdocs.org/tcds/E5CE))

## 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 SE5177NM This certificate issued to: Ritter Cams, Inc.

Purt 13 of the CIVII Aviation Regulations:

Original Product - Type Pertificate Number: E5CE Make: Teledyne-Continental Model: IO-520-B, IO-520-BA, and I0-520-BB for the engine models listed above is being replaced with a camshaft, P/N 32122-2, Description of Type Design Change: continental Part Number (P/N) 629725A3, camshaft manufactured in accordance with Ritter Cams, Inc., Master Drawing No. R1773, Revision 2, dated November 20, 1987, or later FAA approved revisions.

to the above engine models only. This approval should not be extended to other Limilaluns andbundilions: Approval of this change in type design applies specifically engines of these models on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of these engines.

A copy of this certificate shall be maintained as part of the permanent records for if the Federal Aviation Administration .

Dotesfapplicatim: February 26, 1990 Jule wissued:

Date of Issuance: September 11, 1991 Jale nevendal: February 27, 1992 FEDERAL AVIATION By Direction of the Administrator stevent Killer (Signature ) TOMINISTRAIOT Assistant Manager, Seattle Aircraft Certification Office, ANM-101S (Title)

47.

FEB 2 7 1992 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SE5177 NA Applicability of the Design Change:

The following engine model are eligible to use a camshaft, P/N 32122-2, manufactured in accordance with Ritter Cams, Inc., Master Drawing No. R1773, Revision 2, in place of Continental P/N 629726A3.

Engine Type Certification Basis Model Cert No. Effective Date IO-520-B ESCE CAR 13 IO-520-BA June 15, 1956 IO-520-BB Installation of engine modified per this STC is limited to the following aircraft:

Airplane Type Certification Basis Model Cert No. Effective Date Navion Basic A-782 CAR 3 Navion A, B, D, E, F, & G November 13, 1945 The type of propeller approved for this installation is:

McCauley Model 3A32C-406-C (hub) with 6-82NDB-2 (blades) This propeller may be installed only on engines that have one 4th. order and three 6th. order crankshaft dampers.

NOTE: Installation of the Teledyne-Continental Engines listed above on the Navion, Navion A, Navion B, Navion D, Navion E, Navion F, and Navion G may be accomplished only on airplanes that have been modified to accept Teledyne- Continental Model IO-520-B engines. This modification should have been accomplished in accordance with Data Sheet A-782.

- END -

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

## Every issue (1)

- February 27, 1992: Amended, Current. [certificate](https://openairdocs.org/files/sha256/5d/bc/5dbc11b48f30a82456416682d29ac3d2bc8179c6d66ad3a11e2fb62ed9b34417)

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