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Hands, Mind, and Heart

What started as a handful of passionate enthusiasts has developed into a major force—and a significant component—of the aircraft industry.

Builders Log

What records must I keep to document the construction of my homebuilt aircraft?

Answer:  There is no "standard" or "official" form for the builder records (commonly known as the "builder’s log"). The records can be in any form the builder chooses. Our experience has shown that a three ring binder with some loose-leaf pages and some pocket pages (for pictures) works very well. Some builders use a spiral bound notebook, which also works well. Some builders even use their computer and keep all the records electronically. This is acceptable, so long as the records can be made available to the inspector at the time of the final inspection and can be printed out if necessary.

The only requirement is that you do indeed keep records of the construction of the aircraft. The FAA only considers the tasks a builder completes, not the time spent building, so your builder records should record the tasks you accomplish. However, while it’s not required for certification of your homebuilt, you may still wish to track the time spent building, as this experience can later be applied toward the field experience required for an A&P mechanic certificate. Any commercial assistance you pay for should be documented in your builder’s log and made available to the FAA inspector upon request.

You can use the FAA's own checklist as part of your builder records, to record which tasks you complete. This checklist is entitled Amateur-Built Fabrication and Assembly Checklist 2009. It can be found in FAA advisory circular, AC 20-27G. You can find these advisory circulars on the FAA's amateur-built website.

FAA guidance (FAA Order 8130.2F, Chg. 4) recommends that pictures be included in your builder records. Lots of pictures are a plus, especially pictures showing you actually working on the project. The purpose of the builder records is to verify that amateur builders did indeed build the aircraft, so the FAA inspector or Designated Airworthiness Representative (DAR) appreciates pictures of the amateur builders actually working on the project.

Is there any builders log computer software available?

Answer: Yes. EAA introduced an online builders log website for EAA members to document their compliance with the 51% rule. Here are just some of the features:

  • Unlimited Number of Entries: You really can’t over document your build, so we made sure you can upload as often as you like.
  • Unlimited Photos: No limit on the photos you can upload. We know how important your entries are for future reference, so upload away!
  • PDF and Excel File Support: Need to upload a PDF of supplemental drawing or service bulletin.
  • Multiple Aircraft Projects: Builders can have multiple projects going simultaneously.
  • Searchable Entries: Keyword search your builder’s log to locate prior entries.
  • Private Entries: Although sharing is a good thing, you may want to make some entries that no one else can see.
  • Group Project Support: Building with other people? Authorize other EAA members to up¬date the builder’s log.
  • Follow Other Projects: Keep track of progress of friends using the log or other builders of same model. Sign up for email notifications when your followed projects are updated. Choose from daily, weekly and monthly updates.
  • Automated Reporting: Generate charts of project hours, entries, and expenses.
  • Email reminders to get back to the shop!

Sign up at EAABuildersLog.org
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