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This document is a Supplemental Type Certificate (STC) issued for the fabrication and installation of main landing gear shock strut assemblies for specific aircraft models.
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How to fill out supplemental type certificate

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How to fill out Supplemental Type Certificate

01
Gather all necessary documentation related to the aircraft modification.
02
Ensure that the modification complies with applicable regulations and standards.
03
Prepare the application form for the Supplemental Type Certificate (STC).
04
Include detailed descriptions and specifications of the modification.
05
Submit engineering data, including drawings, calculations, and test data.
06
Provide information on the impact of the modification on aircraft performance and safety.
07
Pay the required fees associated with the application.
08
Submit the application to the appropriate aviation authority for review.
09
Respond to any queries or requests for additional information from the review authority.

Who needs Supplemental Type Certificate?

01
Aircraft manufacturers seeking to modify existing aircraft designs.
02
Modification companies that want to certify new alterations or enhancements.
03
Operators looking to implement changes that affect the aircraft's type design.
04
Individuals or organizations developing new equipment intended for use on certified aircraft.
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People Also Ask about

An STC is an approval for a major alteration and major alterations requires a 337. If an item is a minor alteration it does not require an STC and a log book entry will do it.
An STC applicant submits a certification plan to the FAA that details the proposed alteration to a type-certified product and how that alteration will comply with the applicable FAA regulations and guidance material. The FAA reviews the certification plan and issues an STC project number if the plan is accepted.
FAR 1 defines a Major repair as a repair that if improperly done, might appreciably affect weight, balance, structural strength, performance, powerplant operation, flight characteristics, or other qualities affecting airworthiness; or that is not done ing to accepted practices or cannot be done by elementary
FAR 1 defines a major alteration as an alteration not listed in the aircraft, aircraft engine, or propeller specifications that might appreciably affect weight, balance, structural strength, performance, power plant operation, flight characteristics, or other qualities affecting airworthiness or that is not done
Any STC is, by definition, a major alteration and also requires a 337 form.
A supplemental type certificate ( STC ) is a type certificate ( TC ) issued when an applicant has received FAA approval to modify an aeronautical product from its original design.
A supplemental type certificate ( STC ) is a type certificate ( TC ) issued when an applicant has received FAA approval to modify an aeronautical product from its original design.
“A Supplemental Type Certificate is an approval for a major alteration to a type certified product, i.e., an aircraft,” explained Ken Farsi, Managing Partner and President of Aerospace Design & Compliance, LLC and an FAA ODA.

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A Supplemental Type Certificate (STC) is a document issued by aviation authorities that authorizes modifications to an aircraft's design which may not conform to the original type certificate.
Any person or organization that intends to make significant alterations or modifications to an aircraft that affect its design, performance, or safety is required to file for a Supplemental Type Certificate.
To fill out a Supplemental Type Certificate, applicants must complete the appropriate application forms, provide detailed technical data, design documents, and demonstrate compliance with safety and performance standards as outlined by the aviation authority.
The purpose of a Supplemental Type Certificate is to ensure that any modifications or alterations made to an aircraft are compliant with safety requirements and do not adversely affect the airworthiness of the aircraft.
Information that must be reported on a Supplemental Type Certificate includes the description of the modification, the technical data relevant to the changes, compliance with regulatory standards, and the impact of the modifications on the aircraft's performance and safety.
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