Privacy Policy

Last updated: August 20, 2026

Tailcheck LLC ("Tailcheck," "we," "us," or "our") operates the website at tailcheck.me, the Tailcheck mobile application, and related services (collectively, the "Service"). This Privacy Policy explains what information we collect, how we use it, who we share it with, and the choices and rights you have.

The short version: we collect the information needed to run the Service, to keep it secure, and — with your consent where required — to understand how it is used and to promote it. We do not sell your personal information or your documents in a form that identifies you. We do use your data to operate and improve the Service — including training the automated systems that read and analyze logbooks — and we use information in and about your account, including patterns in your aircraft data, to make the Service more useful to you, such as showing you relevant offers and sending you relevant communications, as described below. We also create aggregated, de-identified insights from data across the Service (for example, fleet-wide maintenance trends), which we may license or sell — never in a form that identifies you. If you delete your account, we delete your personal information but retain aircraft records and uploaded documents, disassociated from you, as described in Section 10. When you choose to share your data with other people, what those people do with it is outside our control.

Your use of the Service is also governed by our Terms of Service, which incorporate this Privacy Policy.

1. Who We Are

The Service is operated by:

Tailcheck LLC Contact: support@tailcheck.me

2. Information We Collect

Information you provide to us

Account information. When you create an account, we collect your email address and, optionally, your name. Accounts are accessed through secure sign-in links sent to your email address.

Aircraft and records data. When you add an aircraft, we collect the aircraft identifiers you provide (such as registration ("tail") number, serial number, make, and model). You can then upload and store records associated with that aircraft — logbook pages (PDFs or photographs), maintenance releases, service bulletins, Airworthiness Directive documentation, invoices, weight-and-balance data, STCs, FAA Form 337s, images, ZIP archives of records, and other files — and we store those files along with the structured data our systems extract from them, such as dates, times, component information, inspections, and maintenance entries. The Service is designed as a repository for aircraft records, and everything you upload is treated as part of the aircraft's record under this Policy — including the retention and records-continuity provisions in Sections 7 and 10. Do not upload files that are unrelated to an aircraft or that contain sensitive personal information about you or others. This data belongs to you, subject to the license and records-continuity terms in our Terms of Service.

Photographs (mobile app). The Tailcheck mobile application may request access to your device's camera to photograph logbook pages for upload. Photos you capture through the app are transmitted to our servers for processing. We do not access your photo library or images other than those you capture or select for upload through the app.

Billing information. Payments are processed by Stripe, our third-party payment processor. Your card details are collected and handled by Stripe under its own privacy policy; we never see or store your full card number. We store the information needed to manage your subscription — such as Stripe customer and subscription identifiers, subscription status, your billing name and billing address, the aircraft a subscription applies to, and purchase records for billing, tax, accounting, and support purposes.

Communications. If you contact us (for example, by emailing support), we keep a record of that correspondence.

Information we collect automatically

Usage and device information. When you use the Service, we and our service providers automatically collect certain technical information, such as IP address, browser and device type, operating system, pages viewed, features used, search queries and aircraft lookups, referral source, campaign parameters, timestamps, and general location derived from IP address (such as city or region). Some of this collection is essential to operating and securing the Service; other collection (analytics and advertising) occurs only in accordance with your consent choices, as described in Section 5 (Cookies and Consent).

Cookies and similar technologies. We use cookies, pixels, tags, software development kits, and similar browser and device storage technologies, managed through our consent management platform. See Section 5.

Information we receive from other sources

Aviation data providers and public records. To provide the Service, we retrieve information about aircraft from governmental and third-party sources — for example, FAA registry and registration-history data, Airworthiness Directive data, accident and incident records, and data from providers that track aircraft movements, registration changes, and aircraft history. Because aircraft registration is a matter of public record, some information associated with an aircraft you own (such as the registered owner's name and address in the FAA registry) may already be publicly available, and we may collect, display, and use that public-record information as part of the Service. Retrieving third-party data requires us to send identifying information about the aircraft to those providers, as described in Section 7.

Other users. If another user shares an aircraft with you, invites you to collaborate, or adds information relating to you (for example, identifying you as a mechanic or co-owner), we receive that information from them.

Advertising and analytics partners. We may receive campaign, measurement, and attribution information from the advertising and analytics services described in Section 6.

3. How We Use Information

We use the information described above to:

• Provide and operate the Service — authenticate you, maintain your session, process and store your documents, extract and structure your logbook data, generate the reports, timelines, and analyses you request, and enable the sharing features you choose to use;
• Process payments and manage subscriptions, including billing support, renewal notices, and fraud prevention in connection with payments;
• Communicate with you, including sign-in links, receipts, service and security notices, support responses, and — subject to your ability to opt out — product news, tips, feature announcements, and offers;
• Personalize the Service and our communications, as described in Section 4;
• Understand and improve the Service, including analyzing usage, diagnosing problems, developing new features, and testing;
• Train and improve our automated systems. We use Your Content — including uploaded documents, the data extracted from them, and the corrections and annotations you make — to develop, train, evaluate, and improve the automated document-processing, extraction, and analysis systems we use to provide the Service. This is how Tailcheck gets better at reading logbooks. Where practicable, we use de-identified or aggregated data for this purpose. These systems are designed to learn general patterns (for example, how maintenance entries are typically written and structured), not to reproduce your documents for other users;
• Market and measure, in accordance with your consent choices — including measuring the performance of our advertising campaigns and showing you Tailcheck's own advertising on other platforms;
• Protect the Service and others — detect, investigate, and prevent fraud, abuse, security incidents, and violations of our Terms of Service, and enforce our agreements;
• Comply with law — meet our legal, tax, accounting, and regulatory obligations, respond to lawful requests, and establish, exercise, or defend legal claims; and
• Create aggregated or de-identified data and insights that no longer identify you, which we may use and disclose for any lawful purpose. This includes analyzing trends across aircraft and the fleet — for example, determining that a majority of a given aircraft model experiences longer intervals between tire changes with one brand than another — for analytics, benchmarking, research, improving the Service, and the commercial insights described in Section 7. We will not attempt to re-identify de-identified data except to test the effectiveness of our de-identification.

4. Personalized Offers and Relevant Communications

Tailcheck analyzes aircraft maintenance records. That analysis necessarily produces insights — for example, that an engine is approaching overhaul, that an inspection is coming due, that an aircraft is of a particular make and model, or that you have looked up or claimed particular aircraft. We may use these insights, along with your account information and how you use the Service, to:

• show you relevant features, content, and offers within the Service;
• send you emails and other communications we believe are relevant to you or your aircraft — including information about Tailcheck features and, occasionally, offers or information relating to third-party products or services that we believe are relevant (for example, in connection with an upcoming maintenance event). When we do this, we send the communication ourselves; we do not give the third party your contact information or your logbook data.

You can opt out of non-essential marketing communications at any time from your account settings or via the unsubscribe link in those emails. Essential account and transactional emails (such as sign-in links, receipts, and security notices) are always sent while you have an account.

We do not provide the contents of your logbook documents to advertising platforms, and we do not permit advertising platforms to use your data to advertise anyone else's products.

5. Cookies and Consent

We use a consent management platform (currently Silktide Consent Manager) to give you control over non-essential cookies and similar technologies. When you first visit the Service, a consent banner lets you accept all optional technologies, reject non-essential technologies, or set preferences by category. Your choice is stored so we can honor it on later visits, and you can change it at any time via the "Cookie preferences" link in the page footer.

The categories are:

• Essential. Required to operate the Service — sign-in, security, fraud prevention, load balancing, report unlocking, and remembering your consent choices. These cannot be switched off through the banner.
• Analytics. Optional technologies that help us understand how the Service is used so we can improve it. This currently includes Google Analytics, deployed through Google Tag Manager. If you later create an account or sign in, we may link earlier activity collected under this category to your account to understand how visitors become customers.
• Advertising. Optional technologies used to measure our advertising campaigns and show you relevant Tailcheck advertising. This currently includes Google advertising services (such as Google Ads conversion tracking) deployed through Google Tag Manager, and Meta (Facebook/Instagram) advertising technologies such as the Meta Pixel and Conversions API. When enabled, these technologies may transmit information about your visit (such as pages viewed and actions taken, for example starting a signup or completing a purchase) to the relevant platform, which may associate it with your account on that platform under its own privacy policy.

Analytics and Advertising technologies remain off unless you grant the relevant consent where consent is required. We use Google Consent Mode, so Google tags receive a "denied" signal until you opt in. The specific technologies in each category may change over time; the consent banner and preferences panel reflect the current list.

Opt-out preference signals. Where required by applicable law, we treat a recognized universal opt-out signal, such as the Global Privacy Control (GPC), as a valid request to opt out of the "sharing" of personal information via advertising technologies in that browser.

Do Not Track. Some browsers send legacy "Do Not Track" (DNT) signals. Because no common industry standard for DNT was adopted, the Service does not respond to DNT signals; we honor the GPC signal and the consent choices you make in our banner instead.

6. Advertising Audiences and Measurement

To promote Tailcheck, we may:

• Measure conversions. Use the advertising technologies described in Section 5 to understand whether our ads on platforms such as Google and Meta lead to visits, signups, and purchases.
• Build advertising audiences. Create audiences on advertising platforms using a hashed (pseudonymized) version of your email address or similar identifiers — for example, to show Tailcheck ads to our existing users, to exclude existing customers from acquisition campaigns, or to reach audiences with similar characteristics ("lookalike" audiences). The platform matches the hashed identifier against its own user base under its own privacy policy.

We do not give advertising platforms your logbook documents or their contents.

Under some U.S. state privacy laws, using cookies and pixels for cross-context behavioral advertising, or providing hashed identifiers to advertising platforms, may be considered "sharing" or "targeted advertising" even though no money changes hands. You can opt out of this activity at any time by rejecting the Advertising category in our cookie preferences, by using a recognized opt-out preference signal such as GPC, or by contacting us at support@tailcheck.me. Opting out of marketing emails also removes you from email-based audience lists we control.

7. How We Share Information

We do not sell your personal information, and we do not sell, license, or trade your documents or your identifiable data for others' independent use. We do license and sell aggregated, de-identified insights, as described below. We share information only as described in this Section.

Service providers (processors)

We rely on third-party service providers to operate the Service. They process information on our behalf, under contracts that restrict their use of it to providing services to us. These include:

• Cloud infrastructure and storage (currently Amazon Web Services), which hosts the Service and stores your data in the United States;
• Document processing and analysis providers, which we use to digitize your logbooks, extract information, and generate reports. Delivering these features requires transmitting the contents of your uploaded documents to these providers. They are contractually restricted from using your data for their own purposes, including training their own models, and retain it only as long as needed to complete processing (plus any limited period for security and abuse prevention);
• Stripe, which processes payments as described in Section 2;
• Customer.io, our email service provider, which receives your email address, name, and limited account attributes (such as subscription status, product-usage milestones, and attribution data) to deliver our emails, honor your email preferences, and help us understand account lifecycle journeys. We do not share your logbook documents with Customer.io;
• Analytics and advertising services as described in Sections 5 and 6, in accordance with your consent choices; and
• Other vendors that support functions such as customer support, security, and error monitoring.

Aviation data providers

To retrieve the third-party data the Service displays — such as registry information, Airworthiness Directives, accident and incident records, and flight activity — we transmit identifying information about aircraft (such as registration number, serial number, make, model, and related query parameters) to governmental sources and third-party data providers. Much of this information (for example, an aircraft registration number) is already part of public or governmental records. These providers operate under their own privacy policies and data-use agreements, and we are not responsible for their practices. We do not send these providers your logbook documents.

Other users and the public — at your direction

The Service lets you share an aircraft and its data with other registered users you choose (for example, a mechanic, co-owner, colleague, prospective buyer, or advisor), and to publish a public profile or public report for an aircraft. Nothing is shared with another user or made public unless you enable it. Section 8 explains the consequences of sharing.

Aggregated and de-identified insights

We may create statistics, trends, and insights from data across the Service that do not identify you — for example, fleet-wide maintenance patterns by aircraft model, component reliability and replacement intervals, or comparisons between parts brands — and we may use, license, or sell those insights to third parties such as manufacturers, parts vendors, maintenance providers, and researchers. Insights are aggregated or de-identified before disclosure: they do not include your name, contact information, account details, or your documents, and are not disclosed in a form that identifies you. Where we license or sell de-identified data or insights, we contractually require recipients not to attempt to re-identify the data and to maintain it in de-identified form.

Verified aircraft owners — records continuity

In aviation, an aircraft's records customarily travel with the aircraft. We retain uploaded records in part for safekeeping on behalf of the aircraft's current and future owners, and we may provide copies of the records associated with an aircraft to a person who verifies, to our satisfaction, that they are a current owner of that aircraft or the owner's authorized representative — for example, an owner whose physical logbooks have been lost or destroyed, or a subsequent owner after the aircraft is sold. When we do this, we provide the aircraft's records; we do not provide the uploader's account information (such as their email address or account activity). Sections 8 and 10 and our Terms of Service describe how this interacts with sharing, deletion, and account closure.

Legal, safety, and compliance

We may disclose information if we believe in good faith that disclosure is required by law or legal process (such as a subpoena or court order), or is reasonably necessary to protect the rights, property, or safety of Tailcheck, our users, or the public, to detect or prevent fraud or abuse, or to enforce our Terms of Service. Where legally permitted, we will attempt to notify you of legal demands for your data.

Business transfers

If Tailcheck is involved in a merger, acquisition, financing, reorganization, bankruptcy, or sale of all or part of its assets, your information may be disclosed to the parties involved (under confidentiality obligations) and transferred as part of that transaction. If the transaction results in a material change to this Privacy Policy, we will notify you as described in Section 15.

With your consent

We may share information for other purposes with your consent or at your direction.

8. Sharing With Other Users — What You Should Know

Sharing is a core feature of Tailcheck, and it is entirely under your control. Before you share, understand what sharing means:

• Shared users can see what you share. When you grant another user access to an aircraft, they can view the data and documents associated with it at the access level you grant.
• We cannot control what other people do with your data. Once another user (or anyone viewing a public profile or report) has seen your data, they may remember it, copy it, screenshot it, download it, or disclose it outside the Service. Tailcheck has no control over, and no responsibility or liability for, how other users or third parties use, retain, or further disclose information you have shared with them or made public.
• Revoking access is not retroactive. You can revoke a user's access or unpublish a public profile at any time, and the Service will stop displaying your data to them. Revocation does not retrieve or delete copies, exports, screenshots, or knowledge they obtained while access was active.
• Share deliberately. Only share aircraft data with people you trust for the purpose at hand, and only publish publicly what you are comfortable being permanently public.

Other users who receive access to your data through the Service are independent of Tailcheck. They are not our agents, and their handling of your information is governed by their own obligations and, where applicable, their own privacy practices — not this Policy.

If you are a user who has been granted access to someone else's aircraft data, you agree to use that data only for the purpose for which it was shared with you and in compliance with applicable law.

9. Data Storage and Security

Your data is stored on Amazon Web Services (AWS) infrastructure in the United States. We use encryption in transit (TLS) and at rest. Access to production systems is restricted to authorized personnel and protected by multi-factor authentication and audit logging.

No method of transmission or storage is completely secure, and we cannot guarantee absolute security. If we learn of a security incident affecting your personal information, we will notify you and applicable regulators as required by law.

10. Data Retention and Deletion

• Active accounts. We retain your account information, aircraft data, and uploaded documents for as long as your account is active, so the Service can function as a long-lived record of your aircraft. If a subscription lapses, your data is currently retained and viewable free of charge in read-only form; as described in our Terms of Service, free data retention for unpaid accounts is a courtesy we may modify or discontinue, and we will make reasonable efforts to notify you before doing so.
• Deletion of your personal information. You may delete individual documents or aircraft from within the Service, and you may request deletion of your account at any time by contacting support@tailcheck.me. Within 30 days of a verified account-deletion request, we will delete your personal information from our active systems — your account details (such as email address and name), billing associations, usage data linked to you, and the association between your identity and any aircraft or documents in our systems.
• Aircraft records are retained. Aircraft maintenance records are records about an aircraft, not only about a person, and an aircraft's history has enduring value that outlives any one account. When you delete content or your account, we retain the aircraft information, uploaded documents, and data extracted from them, disassociated from your identity, and may continue to use those materials to operate, secure, and improve the Service (including training our automated systems as described in Section 3), to preserve the continuity of aircraft history — including safekeeping copies that may be provided to a verified current or subsequent owner of the aircraft as described in Section 7 — and for fraud prevention, dispute resolution, and legal compliance. Uploaded documents may inherently contain information recorded in the maintenance entries themselves (for example, the names and certificate numbers of mechanics who signed them); that information is retained as part of the aircraft's record. You may submit a records-destruction request to support@tailcheck.me; we will honor such requests where required by applicable law, and may honor them in our discretion where permissible.
• Backups. Deleted data may persist in encrypted backups for a limited period until those backups expire on our routine backup rotation schedule, after which it is permanently deleted. Backups are not used to restore deleted data except in the event of a disaster recovery.
• Retention we must keep. We may retain certain information after deletion where reasonably necessary to comply with legal, tax, and accounting obligations (for example, billing records), to resolve disputes, to enforce our agreements, to prevent fraud and abuse (for example, records of accounts terminated for abuse), or as otherwise required or permitted by law. We may also retain aggregated or de-identified data that does not identify you.
• Improvements to our systems. As described in Section 3, we use Your Content to train and improve our automated systems. Deleting your content or account does not reverse improvements already made to those systems. The systems are not designed to store or reproduce your documents.
• Shared copies. Deleting your account or data does not delete copies of information you previously shared with other users or the public that exist outside our systems (see Section 8).

11. Users Outside the United States

The Service is operated from the United States and is directed to users in the United States. Your information is stored and processed in the United States, where privacy laws may differ from those in your jurisdiction. If you access the Service from outside the United States, you do so on your own initiative and consent to the transfer, storage, and processing of your information in the United States as described in this Policy.

12. Your Privacy Rights — U.S. States

Depending on where you live, U.S. state privacy laws (such as those in California, Colorado, Connecticut, Texas, Virginia, and other states) may give you rights with respect to your personal information. The categories of personal information we collect, the sources and purposes, and the categories of third parties to whom we disclose information are described in Sections 2 through 7 of this Policy; those descriptions cover our practices during the preceding 12 months, and this Policy also serves as our notice at collection. Your rights may include the right to:

• Know/access the personal information we have collected about you, including the categories of information, sources, purposes, and categories of third parties to whom it has been disclosed;
• Delete personal information we collected from you, subject to the exceptions allowed by law. As described in Section 10, deleting your account removes your personal information; aircraft records and uploaded documents are retained, disassociated from your identity;
• Correct inaccurate personal information;
• Opt out of the "sale" of personal information, the "sharing" of personal information for cross-context behavioral advertising, and "targeted advertising." We do not sell personal information. As described in Section 6, our use of advertising cookies, pixels, and hashed audience lists may be considered "sharing" or "targeted advertising" under some state laws — you can opt out via the cookie preferences link in our footer, a recognized opt-out preference signal such as GPC, or by emailing support@tailcheck.me; and
• Non-discrimination — we will not deny you the Service, charge you a different price, or provide a different level of quality because you exercised a privacy right.

We do not knowingly sell or share the personal information of anyone under 16. We do not use or disclose sensitive personal information for purposes that would require a "limit use" right under California law.

To exercise these rights, email support@tailcheck.me with the subject line "Privacy Request." We may need to verify your identity (typically by confirming control of the email address on the account). You may use an authorized agent where permitted by law; we may require proof of the agent's authorization. If we decline a request, you may appeal by replying to our decision, and we will explain the outcome of the appeal as required by applicable law.

13. Children's Privacy

The Service is intended for adults and requires users to be at least 18 years old. It is not directed at children, and we do not knowingly collect personal information from children under 13 (or the higher age required in your jurisdiction). If we learn that we have collected personal information from a child, we will delete it promptly. If you believe a child has provided us information, contact support@tailcheck.me.

14. Changes to This Policy

We may update this Privacy Policy from time to time. If we make material changes, we will notify you by email or through a prominent notice on the Service before the changes take effect. The "Last updated" date at the top of this page indicates when the policy was last revised. Your continued use of the Service after the effective date of an updated Policy constitutes acceptance of it.

15. Contact

If you have questions about this Privacy Policy or how we handle your data, contact us at support@tailcheck.me.