Users can fill out FAA Form 337 - Major Repair and Alteration (Airframe, Powerplant, Propeller, or Appliance) directly within the TBX platform.
The best way to create a 377 is to navigate to an aircraft profile and then scroll down to the Form 337 section and select "+ New Form 337":
This will bring up the editor. Section 1 & 2 will automatically populate based on the Aircraft Profile information.
Section 4 select the type of repair or alteration performed, i.e. "Airframe Alteration":
Next select Conformity Statement "Kind of Agency", i.e. Certificated Mechanic and put Cert #:
Next fill out Approval for Return to Service & Cert #:
Fill in the description of the work accomplished and hit Save Changes.
Note the "+ ICA Checklist" button to fill out the appropriate ICA for the installation or repair (As required; ICA's can be added directly in that box or separately).
If there isn't enough room for either the description of the work accomplished and/or the ICA checklist, you may check the box below for "additional sheets attached" to allow you to upload files to the 337.
This will pull up an area in the upper right to upload images.
Finally, remember to hit the "Save Changes" button in the upper right. To print, you can click the download icon 
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