Terms of use
Last updated: 2026-10-04
No warranty
The content is provided "as is", without warranty of any kind, express or implied, including any warranty of accuracy, completeness, merchantability or fitness for a particular purpose. Files may contain transcription errors, may be based on superseded source documents, may describe an aircraft configured differently from yours, and may be incomplete in ways that are not obvious โ a missing emergency procedure is invisible to the person holding the file. Each file states what is known about it; read that before relying on it.
Limitation of liability
To the maximum extent permitted by law, the project, its maintainers and its contributors are not liable for any loss, injury or damage arising from use of this site or its content, including any incidental, consequential or indirect damages. Some jurisdictions do not allow certain exclusions, in which case the exclusions apply to the extent permitted.
Licensing of the content
Rights are recorded per file, not across the site as a whole,
because the project cannot grant a licence in text it does not own. Each file's
rights block states its status and licence:
public_domainโ the source carries no enforceable copyright, with the basis stated. Most are works of the US Government under 17 U.S.C. ยง 105.original_expressionโ the wording is the contributor's own, expressing procedure as fact. Normally offered under CC-BY-4.0.licensedโ used with permission, with the permission recorded.
Check the file you are using. Do not assume one licence covers everything.
Licensing of the site and tooling
The schema and specification are dedicated permissively so anyone can implement them, including in closed commercial products. The site code and tools are Apache-2.0.
If you contribute
By contributing you confirm the warranty set out on the contribute page: that you have the right to submit the content, that you have accurately stated its source, and that you have not copied wording, selection or arrangement from a copyrighted source beyond what the file declares.
Acceptable use
Do not use this site to distribute content you have no right to distribute, and do not present files from here as approved data or as endorsed by any manufacturer or authority. Manufacturer names appear only to identify aircraft; no affiliation or endorsement is implied.
Accounts
Accounts are optional and free. Keep your sign-in secure; you are responsible for what is published from your account. We may remove content or suspend accounts that abuse the site, publish content you have no right to publish, or try to game points or ratings.
Advertising and affiliate links
The site is supported by advertising served by Google and its partners, and some links to products or courses are affiliate links: if you buy through them we may earn a commission, at no extra cost to you. Ads and affiliate links are labelled, are never placed inside a checklist, and do not influence what a checklist says. An advertiser appearing here is not an endorsement of its product, and we are not responsible for third-party sites. See privacy for how ads use cookies.
Affiliate disclosure
Open Checklists is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. As an Amazon Associate I earn from qualifying purchases. Gear suggestions are clearly labelled, link to Amazon search results rather than specific products, never appear inside a checklist, and never print. Buying through them costs you nothing extra; check any item's fit and approval for your aircraft before you buy.
Weather and flight-planning data
Weather, NOTAMs, frequencies and flight plans on this site are an unofficial, unverified convenience. They are not an official briefing. 14 CFR 91.103 requires an official briefing before flight (1800wxbrief.com or 1-800-WX-BRIEF).
Takedown
If you believe something here infringes your rights, see takedown. Material is unpublished first and argued about afterwards.