# STC SE03215CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Continental Motors, Inc., United States
- Description: STC for the conversion of Lycoming O-320-A, B, C, D, E; IO-320-A, B, C, D, E, F; AIO-320-A, B; AEIO-320-D, E to increase engine displacement to 340 cubic inches by installation of a crankshaft with a longer stroke
- Applied: June 21, 2012
- Status date: October 31, 2016
- Product: Engine
- Certification basis: Part 21, Part 33
- Data sheets: [TCDS 1E12](https://openairdocs.org/tcds/1E12), [TCDS E-274](https://openairdocs.org/tcds/E-274)
- Certificate PDF: https://openairdocs.org/files/sha256/0a/44/0a440e5f80ee2730ec518480a08d05f19c4da6808bc7be5c1b57d15430bbc386
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/410171D541558171862580B90052676C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE03215CH

## ADs that name it (0)

None.

## Approved models (83, first 50)

- Lycoming Engines AEIO-320-D1B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines AEIO-320-D2B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines AEIO-320-E1A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines AEIO-320-E1B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines AEIO-320-E2A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines AEIO-320-E2B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines AIO-320-A1A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines AIO-320-A1B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines AIO-320-A2A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines AIO-320-A2B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines AIO-320-B1B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-A1A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-A2A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-B1A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-B1B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-B1C ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-B1D ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-B1E ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-B2A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-C1A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-C1B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-D1A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-D1B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-D1C ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-E1A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-E1B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-E2A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-E2B ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines IO-320-F1A ([TCDS 1E12](https://openairdocs.org/tcds/1E12))
- Lycoming Engines O-320-A1A ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-A1B ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-A2A ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-A2B ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-A2C ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-A2D ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-A3A ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-A3B ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-A3C ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-B1A ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-B1B ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-B2A ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-B2B ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-B2C ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-B2D ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-B2E ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-B3A ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-B3B ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-B3C ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-C1A ([TCDS E-274](https://openairdocs.org/tcds/E-274))
- Lycoming Engines O-320-C1B ([TCDS E-274](https://openairdocs.org/tcds/E-274))

All 83: https://openairdocs.org/stc/SE03215CH/models.md

## 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.

FAA Form 8110-2 (5/14) Page 1 of 2

Number: SE03215CH

Part 33 of the Federal Aviation Regulations. 14CFR Part 33 through Amendment 8 effective May 2, 1977

Original Product – Type Certificate Number: Make: Lycoming Model: O-320-A, B, C, D, E; IO-320-A, B, C, D, E, F;

AIO-320-A, B; AEIO-320-D, E Description of Type Design Change:

STC for the conversion of Lycoming O-320-A, B, C, D, E; IO-320-A, B, C, D, E, F; AIO-320-A, B; AEIO-320-D, E to increase engine displacement to 340 cubic inches by installation of a crankshaft with a longer stroke. Conversion to be accomplished in accordance with AEC Master Parts Deletions and Additions List No MM2009-5 Rev A dated May 14, 2013 or later FAA Approved revisions.

1. Operating procedures and limitations as established in O-340S Operating Manual OP-3.

2. Modification requires the installation of a cylinder head temperature (CHT) monitoring system for all four cylinders.

3. Converted engines are limited to Aviation Grade Gasoline Grade 100 or higher in accordance with ASTM D-910 or equivalent.

4. Compatibility of this conversion with previously approved modifications must be determined by the installer.

5. The converted engine is to be operated in accordance with the Airmotive Engineering Corp. Operators Manual OP-3.

6. If the holder agrees to permit another party to use this STC, the holder shall give the other party written evidence of that permission.

Date of Application: June 21, 2012 Date Reissued: February 4, 2016; June 13, 2016; October 31, 2016 Date of Issuance: June 11, 2013 Date Amended:

Signature

Title James A. Grigg Acting Manager, Fort Worth Aircraft Certification Office, Southwest Region Continental Motors Inc.

2039 S. Broad St.

Mobile, AL 36615

FAA Form 8110-2 (5/14) Page 2 of 2

Transfer the ownership of Supplemental Type Certificate Number: SE03215CH

To (Name and address of transferee)

From (Name and address of grantor)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST10813SC

FAA Form 8110-2 (5/14) Page 3 of 3

## Every issue (1)

- October 31, 2016: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/0a/44/0a440e5f80ee2730ec518480a08d05f19c4da6808bc7be5c1b57d15430bbc386)

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