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Original Product -- Type Certificate Number Make Model 3A25 Cessna 340 340A Description of Type Design Change Installation of a 4-blade MT-Propeller Model MTV-14-D-C-F/CF188-30g propellers on Cessna 340 340A airplanes modified by RAM Series VII FAA STC SA09574SC. If the holder agrees to permit another person to use this certificate to alter a product the holder must give the other person written evidence of that permission FAA STC SA09574SC must ...
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How to fill out supplemental type certificate

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How to fill out Supplemental Type Certificate

01
Obtain the application form from the Federal Aviation Administration (FAA) or the relevant aviation authority.
02
Gather all necessary documentation supporting the changes made to the aircraft.
03
Complete the application form, including details about the original type certificate and modifications.
04
Provide detailed description and justification for the modifications being submitted.
05
Prepare and submit engineering data, compliance checks, and test results as required.
06
Include descriptive pamphlets, engineering drawings, and charts where applicable.
07
Pay any associated fees required for the processing of the application.
08
Submit the application package to the FAA or the applicable authority, and await further instructions or feedback.
09
Respond promptly to any requests for additional information from the reviewing authority.
10
Upon approval, ensure compliance with any operating limitations or maintenance requirements specified.

Who needs Supplemental Type Certificate?

01
Aircraft manufacturers and modification shops who intend to make significant changes to an existing aircraft design.
02
Operators of aircraft that have undergone alterations requiring regulatory approval to ensure continued airworthiness.
03
Any entity looking to legally operate an aircraft that has been modified or for which new equipment has been installed.
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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 an approval granted by the FAA that allows for changes or alterations to a previously approved aircraft design.
Entities or individuals who wish to make changes to the design of an aircraft that affect its type certificate, such as manufacturers or repair stations, are required to file for a Supplemental Type Certificate.
To fill out a Supplemental Type Certificate application, one must complete forms provided by the FAA, detailing the nature of changes, supporting documents, and compliance with applicable regulations.
The purpose of a Supplemental Type Certificate is to validate modifications to aircraft that ensure safety and compliance with aviation regulations while allowing manufacturers or operators to extend the capabilities of their aircraft.
Information that must be reported includes the proposed changes, technical data to support those changes, compliance statements with safety standards, and the impact of the modifications on the aircraft’s performance.
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