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This form is used to document major repairs and alterations made to aircraft in accordance with the Federal Aviation Regulations.
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How to fill out faa form 337

How to fill out FAA Form 337
01
Download FAA Form 337 from the FAA website.
02
Fill out the top section with the owner's information, including name and address.
03
Provide the aircraft information, including the N-number and make/model.
04
Describe the alteration or repair in detail in the designated section.
05
Include the date of the alteration and the type of work performed.
06
Sign and date the form where indicated by the applicant.
07
Obtain the signature of the person or organization performing the work.
08
Submit the completed form to the FAA in your local region.
Who needs FAA Form 337?
01
Anyone who has made alterations or repairs to an aircraft that require FAA approval, including aircraft owners, mechanics, and repair stations.
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How do you get a form 337?
FAA Form 337 is furnished free of charge and is available at all FAA Air Carrier (ACDO), General Aviation (GADO), Manufacturing Inspection (MIDO), and Flight Standards (FSDO) district offices, and at all International Field Offices (IFO).
What is the purpose of the 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.
How many copies of FAA Form 337 are required?
Form 337 is used in the aviation industry for reporting major alterations or major repairs made on an aircraft. This form is required by the **Federal Aviation Administration (FAA) **to ensure that all changes are properly documented. According to FAA regulations, three copies of Form 337 are required.
Do all STCs require a 337?
Major Repairs and Major Alterations always require a form 337. Doesn't matter if it was driven by an SB or an STC, or whatever.
What is FAA Form 337 for?
Form FAA 337 - Major Repair and Alteration (Airframe, Powerplant, Propeller, or Appliance)
What is the difference between Form 337 and STC?
Supplemental Type Certificate (STC) modifications are more of a blanket approval designed to cover an entire family of aircraft types. An STC is a more robust standard than a simple Form 337 that requires more engineering and proof that the intended modifications result in an airworthy plane.
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What is FAA Form 337?
FAA Form 337 is a report of major repairs and alterations to aircraft, issued by the Federal Aviation Administration.
Who is required to file FAA Form 337?
Anyone who performs major repairs or alterations on an aircraft, including repair stations and aircraft owners, is required to file FAA Form 337.
How to fill out FAA Form 337?
To fill out FAA Form 337, provide detailed descriptions of the repairs or alterations, include the type and model of the aircraft, specify the date of the work, and sign and date the form.
What is the purpose of FAA Form 337?
The purpose of FAA Form 337 is to document significant repairs or alterations performed on aircraft to ensure compliance with safety regulations and standards.
What information must be reported on FAA Form 337?
FAA Form 337 must report information such as the aircraft's registration number, nature of the work performed, date of completion, and the signature of the person approving the work.
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