# STC SA00364LA

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Structural Integrity Engineering, United States
- Description: Retirement life extension of de Havilland DHC-6-300 wing in accordance with FAA approved Structural Integrity Engineering Master Drawing List SIE-23-900, Revision B, dated April 7, 1997, or later FAA approved revision.
- Applied: January 25, 1994
- Status date: December 29, 2003
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A9EA](https://openairdocs.org/tcds/A9EA)
- Certificate PDF: https://openairdocs.org/files/sha256/75/81/7581cf3065e7d32188b4050619f69ee4698d3fa4febb9867c7f12808f9aba6f5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CBC8616ABE4C362786256E620057DA54.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA00364LA

## ADs that name it (0)

None.

## Approved models (1)

- Bombardier Inc. DHC-6-300 ([TCDS A9EA](https://openairdocs.org/tcds/A9EA))

## 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 Structural Integrity Engineering 9525 Vassar Avenue Chatsworth, California 91311 Part 3* of the Civil Air Regulations. *Certification basis is set forth in Type Certificate Data Sheet A9EA.

A9EA de Havilland DHC-6-300 Series Description of Type Design Change: Retirement life extension of de Havilland DHC-6-300 wing in accordance with FAA approved Structural Integrity Engineering Master Drawing List SIE-23-900, Revision B, dated April 7, 1997, or later FAA approved revision.

Limitations and Conditions: This installation should not be incorporated in any aircraft of this model unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft.

In order for STC SA00364LA to be applied to a DHC-6-300 aircraft, a candidacy inspection shall be performed by a SIE designated inspection team. This candidacy inspection must be performed in accordance with SIE Report #SIE-23-702, "Candidacy Inspection Program, DHC-6-300 Twin Otter Wing Life Extension STC", Revision A, dated June 6, 1996, or later FAA approved revision. (See page 3)

Date of application : January 25, 1994

Date of issuance : April 28, 1997

Date reissued : December 29, 2003

( Signature) Manager, 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 SA00364LA

Limitations and Conditions (Cont.)

Only upon satisfactory compliance with the inspection criteria, or the establishment of a feasible and reasonable potential of becoming compliant, candidacy for STC SA00364LA will be granted.

Structural Integrity Engineering’s Report Number SIE-23-701, Revision C, dated April 22, 1997, or later accepted revision, provides the necessary instructions for continued airworthiness information and is part of this STC. (Section II of this report, which contains the Airtworthiness Limitations, is FAA approved.)

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.

- END -

## Every issue (1)

- December 29, 2003: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/75/81/7581cf3065e7d32188b4050619f69ee4698d3fa4febb9867c7f12808f9aba6f5)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.