# STC SA00422SE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Micro AeroDynamics Inc, United States
- Description: Installation of Lycoming TIO-540-J2B(left side) or LTIO-540-J2B (right side).
- Applied: February 27, 1997
- Status date: March 28, 1997
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A20SO](https://openairdocs.org/tcds/A20SO)
- Certificate PDF: https://openairdocs.org/files/sha256/82/ed/82ed5af343daedb491b537cba592095a1df39f80208a98313ef469f541fc6118
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/30AA8AFCBD6DC8D385256CC1007DC90E.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA00422SE

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-31-350 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))

## 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.

Number SA00422SE

This certificate, issued to Micro AeroDynamics, Inc.

4000 Airport Road, Suite D Anacortes, WA 98221

Part 23 of the Federal Aviation Regulations.

Original ProductType Certificate Number: A20S0 Make: Piper Model: PA-31 -350

Description of the Type Design Change: Installation of Lycoming TIO-540-J2B (left side) or LTIO-540-J2B (right side) per Micro AeroDynamics, Inc., Installation Manual MA2083, Revision IR dated March 24, 1997, or later FAA approved revision.

Limitations and Conditions: Approval of th is change in type design applies to the above model aircraft only.

This approval should not be extended to other aircraft 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 aircraft. A copy of this Certificate must be maintained as part of the permanent records for the modified aircraft.

The STC holder will provide each person it permits to use this certificate, to alter the product, written evidence of the agreement in a form acceptable to the Administrator.

Date of application: February 27, 1997 Date reissued:

Date of issuance: March 28, 1997 Date amended:

(Signature)

Acting Manager, Seattle Aircraft Certification Office (Title)

## Every issue (1)

- March 28, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/82/ed/82ed5af343daedb491b537cba592095a1df39f80208a98313ef469f541fc6118)

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