11/1/19 AC 43.9-1G
2
7 ELECTRONIC FORMAT.
7.1 Electronic Tracking Number. In the upper right corner of the form’s header, there is a
block titled “Electronic Tracking Number.” This block is used only in the electronic
version to automatically apply a number that identifies and retrieves forms electronically.
Further information on the use of this number is supplied in training material at the
website provided in paragraph 6.2 of this document.
7.2 Watermark. Under current policy, the header block titled “For FAA Use Only” has no
official use except as a watermark applied automatically to indicate submittal when using
electronic media.
8 FORM INSTRUCTIONS. 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. The following instructions
apply to Items 1 through 8 of the form as illustrated in Appendix A, FAA Form 337. The
terms “Item” and “Block” are used synonymously in FAA documents relating to data
collection on FAA Form 337.
8.1 Item 1 – Aircraft. The “Nationality and Registration Mark” is the same as shown on
Aircraft Certification (AC) Form 8050-3, Certificate of Aircraft Registration. An “N”
prefix denotes the nationality for U.S.-registered aircraft. Information to complete the
“Make,” “Model,” and “Serial Number” blocks is found on the aircraft manufacturer’s
identification plate. A “Series” block has been provided to further identify the series of a
specific model. Proper segregation of the model and series will be useful in collecting
data for safety related issues.
Note: When the aircraft registry receives a completed FAA Form 337 for the
official aircraft file, it is validated by matching the registration “N” number with
the serial number. If an application for a change to the “N” number has been
made, it is important for the submitter to receive verification of the change from
the FAA registry with a new AC Form 8050-3. If the FAA Form 337 must be
submitted before receipt of the new registration, then the old “N” number must be
used.
8.2 Item 2 – Owner. Enter the aircraft owner’s complete name and address as shown on
AC Form 8050-3. When work is performed during a change in ownership, it is
permissible to use the name and address shown on AC Form 8050-1, Aircraft
Registration Application.
Note: When a major repair or major alteration is made to a component part, Items
1, 2, and in some cases 5 will be left blank and the original and duplicate copies
of the form will remain with the part until it is installed on an aircraft. After
entering the required information in Items 1, 2, and if appropriate, 5, the person
who installed the part will give one form to the owner/operator and forward the
duplicate copy to the FAA registry within 48 hours after the aircraft is approved