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.
What is the function of an FAA form 337 or the major repair and alteration form to an aircraft?
FAA Field Approval (FAA Form 337) issued for duplication of identical aircraft may be used as approved data only when the identical alteration is performed on an aircraft of identical make, model, and series by the original modifier.
Do all STC’s require a 337?
Any STC is, by definition, a major alteration and also requires a 337 form.
Where can one find a reference to the form and disposition of an FAA form 337?
4. INFORMATION. FAA Form 337 is free and available at all FAA Manufacturing Inspection District Offices (MIDO), Flight Standards District Offices (FSDO), International Field Offices (IFO), certificate management offices (CMO), and online at
What is the purpose of an airworthiness certificate?
An airworthiness certificate is an FAA document which grants authorization to operate an aircraft in flight.
Who may grant zero time to an engine?
Section 91.421 provides that zero time may be granted to an engine that has been rebuilt by a manufacturer or an agency approved by the manufacturer. When this is done, the owner/operator may use a new maintenance record without regard to previous operating history.
Where do I send the 337 to the FAA?
Any FAA Form 337 that describes a modification to an aircraft fuel system or that shows additional tanks installed, should be mailed to the FAA, Aircraft Registration Branch, AFS-751, P.O. Box 25724, Oklahoma City, OK.
Are AFM supplements required?
and is required to be in the aircraft along with any required flight manual supplements. An FAA approved Flight Manual (AFM) is required to be in the aircraft for all aircraft over 6,000 lbs and for aircraft manufactured after March 1, 1979.
Where do I mail a 337?
What address do I mail the FAA Form 337 for a newly installed supplemental type certificate (STC)? ANSWER: Completed forms should be submitted to the Aircraft Registration Branch, AFS-750, PO Box 25504, Oklahoma City, Oklahoma 73125.
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.
What is minor repair in aviation?
Minor Repair
Minor repairs are performed on defective component and/or part of an aircraft in order to restore to its original condition or, at least, to a functional condition.
Who owns a supplemental type certificate?
An STC (Supplemental Type Certification) is issued by a civil aviation authority, such as the Federal Aviation Administration (FAA) or European Aviation Safety Agency (EASA), to an applicant who modifies or alters an aircraft, engine, propeller or appliance from its original type design.
How long is a special flight permit valid for?
You’ll state a departure and destination, any anticipated fuel stops, the departure date (the permit is generally valid for 10 days), plus the duration of the flight. You’ll state the specific reason why the aircraft is unairworthy.
What are the three primary regulations that govern the airworthiness of an aircraft?
There are three primary regulations that govern the airworthiness of an aircraft: 14 CFR part 21—Certification Procedures for Products and Parts. 14 CFR part 43—Maintenance, Preventive Maintenance, Rebuilding, and Alterations. 14 CFR part 91—General Operating and Flight Rules.
How do I get FAA Advisory Circulars?
Advisory Circulars are sometimes first published as drafts, open to public comment. You can find these drafts by visiting: You may subscribe to the Flight Standards Service to receive updates.
Is an airworthiness certificate transferable to the new owner when an aircraft it sold?
An airworthiness certificate usually is transferred with an airplane when it is sold, but the certificate alone does not fulfill the regulatory requirement. A buyer must ensure that the airworthiness certificate is, as the regulation specifies, current.
How long does it take to get an airworthiness certificate?
The certification was completed in March 2017. Amended type certificates typically take 3-5 years to complete. By comparison, the certification of a new aircraft type can take between 5 and 9 years.
Where can I get airworthiness certificate?
Where do most major American air carriers attach and display their aircraft’s Airworthiness Certificate? ANSWER: Most of them are on the inside of the cockpit door. However, I have seen airworthiness certificates on the ceiling just above the entrance door and on the wall of the passageway leading to the cockpit.
