# STC SE01791LA

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: COLORADO AIR PARTS, United States
- Description: Conversion of the subject engines to incorporate modification of crankcase, replacing crankshaft assembly, main bearings, rod assembly, piston, fuel system, and fuel system adjustment.
- Applied: June 14, 2004
- Status date: August 21, 2015
- Product: Engine
- Certification basis: Part 21, Part 33
- Data sheets: [TCDS E5CE](https://openairdocs.org/tcds/E5CE)
- Certificate PDF: https://openairdocs.org/files/sha256/26/7c/267cf682133a1de48d1d0a511e1919eb3250810356c217f73f67de3cf1193563
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7A580CFC072DFAD986257EAE00717664.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE01791LA

## ADs that name it (0)

None.

## Approved models (5)

- 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))
- Continental Motors IO-520-C ([TCDS E5CE](https://openairdocs.org/tcds/E5CE))
- Continental Motors IO-520-CB ([TCDS E5CE](https://openairdocs.org/tcds/E5CE))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

This Certificate issued to COLORADO AIR PARTS 659 CRAWFORD AVENUE DELTA, COLORADO 81416 Part 33* of the Federal Aviation Regulations. *Certification basis is set forth in Type Certificate Data Sheet E5CE Original Product Type Certificate Number :

E5CE Teledyne Continental Motors IO-520-B, -BA, -BB, IO-520-C, -CB Description of Type Design Change : Conversion of the subject engines to incorporate modification of crankcase, replacing crankshaft assembly, main bearings, rod assembly, piston, fuel system, and fuel system adjustment in accordance with Master Document List EE1004 -5, IO-550-B-EE, -C-EE, Revision A, dated April 27, 2005, or later FAA approved revisions. The resulting external configuration, interfaces and operating limitations will be identical to Type Certificate Data Sheet E3SO, IO550-B and IO -550-C at 300BHP +5%, - 0% at 2700 RPM. Modified engines will be identified with an additional engine data plate.

Limitations and Conditions: Approval of this change in type design applies to the above engine model(s) only. This approval should not be extended to an engine model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adver se effect upon the airworthiness of that engine. A copy of this STC SE01791LA or a later FAA approved version must be included in the permanent records of the modified engine. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

See page 3 for limitations and conditions.

Date of application : June 14, 2004

Date of issuance : May 23, 2005

Date reissued August 21, 2015

(Signature) Supervisor, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office (Title)

NOTE:

**DO NOT DELETE THIS PAGE.**

**DO NOT ADD ANY DATA TO THIS PAGE.**

**THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.**

Number SE01791LA

1) Certification Basis for STC SE01791LA is Title 14 Code of Federal Regulations (CFR) part 33, Amendment 33-8.

2) Instructions for Continued Airworthiness for IO-520-B, -BA, -BB conversion to IO-550-B- EE, is stated in Report EE1004-9, Revision IR, dated 7/19/04, and subject to all Airworthiness Directives issued against IO-550-B engine.

3) Instructions for Continued Airworthiness for IO-520-C, -CB conversion to IO-550-C-EE, is stated in Report EE1004-10, Revision IR, dated 7/19/04, and subject to all Airworthiness Directives issued against IO-550-C engine.

4) Instructions for Crankcase Disassembly-Rework, Engine Final Assembly, Post Conversion Overhaul Test, Installation of additional Engine Data Plate for IO-550- (-)-EE, and Engine Log Book entries will be conducted per Master Document List EE1004-5, Revision A, dated 4/27/05, as per Flow Chart on Process for Conversion of Teledyne Continental Motors Engine Models, dated 4/13/05, or later FAA approved revisions.

-END-

## Every issue (2)

- August 21, 2015: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/26/7c/267cf682133a1de48d1d0a511e1919eb3250810356c217f73f67de3cf1193563)
- May 23, 2005: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/aa/f7/aaf7672ca85fe365272eae3ff917b2e65bac8a173ede4adf2c7a7364aa2f956c)

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