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The document outlines the requirements and procedures for submitting FAA Form 337, which is used to report major repairs and alterations to aircraft. It emphasizes compliance with the Paperwork Reduction Act, mandates the display of a valid OMB Control Number, and provides instructions for completing the form. The document also details the necessary information regarding aircraft identification, owner details, type of work performed, conformity statements, and approval for return to service.

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What is the purpose of FAA form 337?

The person who performs or supervises a major repair or major alteration must prepare FAA Form 337. The form is executed at least in duplicate and is used to record major repairs and major alterations made to an aircraft, airframe, powerplant, propeller, appliance, or a component part thereof.

Does an STC require a form 337?

Any STC is, by definition, a major alteration and also requires a 337 form.

Do I need a 337 for a TSO part?

In many cases, installing a TSO part \u201cmay\u201d require a Form 337 because installing it would be considered a major alteration of the original type design. For example, installing a new TSO glass cockpit in a Cessna 172 would require a Form 337.\u201d

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Can a A&P fill out 337?

If the alteration is minor, the approval can be done by any licensed A&P mechanic. However, if the alteration is deemed to be major, it requires a mechanic with an Inspection Authorization (IA), in order to sign the approval block on the 337 form and submit it to the FAA.

Who fills out block 3 of a 337 form?

What is FAA form 337 Field approval?

The Aviation Safety Inspector can sign Block 3 of FAA Form 337 to approve the repair or alteration, or. Additional data from the applicant is needed if the original data package is found to be inadequate, or. The data needs Aircraft Certification Office review in light of its complexity or adequacy, or.

What is meant by Field approval?

A field approval is one of the means used by the FAA to approve technical data used to accomplish a major repair or major alteration.

What is an aviation 337?

Form FAA 337 - MAJOR REPAIR & ALTERATION (Airframe, Powerplant, Propeller, or Appliance)

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