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The document is a form approved by the U.S. Department of Transportation's Federal Aviation Administration (FAA) for reporting major repairs and alterations to aircraft, including airframe, powerplant, propeller, or appliance. It outlines the necessary information required for compliance with federal regulations, including details about the aircraft, owner, type of work performed, and certification by authorized individuals. The form serves to track maintenance activities and ensure adherence to airworthiness standards.

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How many copies of FAA form 337 are required?

FAA Form 337 will be executed in duplicate with one signed copy given to the aircraft owner and one copy forwarded to the FAA within 48 hours after the airframe, aircraft engine, propeller, or appliance is installed on an aircraft and approved for return to service.

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.

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?

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.

What is an aviation 337?

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

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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

What is a form 337 aviation?

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

What is a field approval in aviation?

A field approval is the granting by an FAA airworthiness safety inspector of an FAA approval for a major repair or major alteration based on examination of data or physical inspection or testing.

What can a certified repair station use in lieu of form 337 after performing a major repair?

FAR Part 43, Appendix B, Paragraph (b) authorizes FAA certificated repair stations to use a work order, in lieu of FAA Form 337, for only major repairs.

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Do I need a 337 for a TSO part?

What is a form 337 aviation?

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What can a certified repair station use in lieu of form 337 after performing a major repair?

Who fills out block 3 of a 337 form?

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