# STC SE4941NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Merlyn Products Inc., United States
- Description: Install low-compression pistons, new fuel servo and new fuel pump.
- Applied: January 11, 1990
- Status date: May 30, 1990
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1E4](https://openairdocs.org/tcds/1E4)
- Certificate PDF: https://openairdocs.org/files/sha256/1f/0e/1f0e652b0549e59ac0505e2f34420274048bf4a7f4c662265ae54ab735cad450
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D58EE19D873FD93E85256CC2005A7597.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SE4941NM

## ADs that name it (1)

- [AD 2002-19-03](https://openairdocs.org/ad/2002-19-03): Crankshaft · Lycoming Engines IO-540-A1A5, IO-540-AA1A5, IO-540-AA1B5 and 81 more. Effective Sep 20, 2002. Named in the applicability

## Approved models (1)

- Textron Lycoming AVCO Corporation IO-540-S1A5 ([TCDS 1E4](https://openairdocs.org/tcds/1E4))

## 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: SE4941 NM This certificate issued to: Merlyn Products Purt 13 of the IViT Air Regulations$s Amended by 13-1, 13-2, and 13-3.

Original Product - Typebertificate Numben: 1E4 Make: Lycoming Model: 10-540-S1A5 andrew fue fun Dugnahange. Install low-compression pistons, new fuel servo pump, in accordance with Merlyn Products, inc. installation Report 25-4, dated January 10, 1990, or later FAA approved revision.

Limitations and Conditions: Approval of this change in type design applies to the above model engines only. This approval should not be extended to other engines of this model on which other previously approved modifications are incorporated unless it is determined that the relationship 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 that engine. A copy of this Certificate and the Continuation Sheet must be maintained as part of the permanent records for the modified engine. (cont.)

Date of Application: January 11, 1990 Date Reissued:

Date of Issuance: May 30, 1990 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Stewat Kmilla TAIN STRATO Aircraft Certification Office Assistant Manager, Seattle (Title)

47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SE4941NM Limitations and Conditions: (continued) Engine Model: IO-540-S1A5(AE) Engine Limits: 2425 RPM, 37 in. Hg MAP, 290 HP all operations.

- END -

**FAA FORM 8110-2-1 (10-69) PAGE OF3 PAGES**

## Every issue (1)

- May 30, 1990: Issued, Current. [certificate](https://openairdocs.org/files/sha256/1f/0e/1f0e652b0549e59ac0505e2f34420274048bf4a7f4c662265ae54ab735cad450)

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