Effective Date: April 10, 2026 · Last Updated: April 16, 2026
Preflight AI LLC (“Company,” “we,” “us”) operates TachMinder. This Privacy Policy describes how we collect, use, and protect your personal information when you use our Service.
We do not sell your personal information. We share data only with:
When you use AI features (Ask TachMinder, document parsing, pre-visit summaries, advisor queries), your aircraft data and queries are sent to Anthropic's AI API for processing. Anthropic does not use your data to train their models. AI-generated responses are not retained by Anthropic beyond short-term operational use (e.g., safety monitoring) per their commercial terms.
Document extraction. Text-based PDFs are extracted on our own servers without sending the file to any third party. Scanned documents and images (e.g., photos of logbook pages, handwritten entries) are sent to Anthropic's AI vision API for optical character recognition because they cannot be read by on-server text extractors. In both cases, the extracted text and a structured representation of its contents are stored in our database alongside the original file.
Validation and review. Every extraction is checked against physical invariants (for example, hobbs time can never decrease, tach time cannot exceed hobbs time, AD numbers must match a recognized format) and classified by confidence. High-confidence extractions update your aircraft's records automatically; medium-confidence extractions are placed in a pending-review queue for your approval; low-confidence extractions are quarantined and cannot update your records until you correct them or dismiss them. The original extracted data is never overwritten — corrections are stored separately so the audit trail is preserved.
Aircraft profile as AI context. To make advisory responses accurate, we generate and maintain a per-aircraft profile that aggregates your aircraft's current times, maintenance schedule, AD compliance, oil trends, document history, and open items. When you ask the AI a question about your aircraft, this profile is included in the prompt so the model can reason about your specific situation. The profile is regenerated as your data changes and is stored with your aircraft record. Deleting the aircraft deletes the profile.
Your data is stored on servers in the United States. We use industry-standard security measures including encrypted connections (TLS), encrypted database storage, and access controls. Uploaded files are stored in Cloudflare R2 with access restricted to your account.
We retain your data for as long as your account is active. If you delete your account, we will delete your personal data within 30 days, except where retention is required by law or for legitimate business purposes (e.g., billing records).
Uploaded documents, their extracted text, structured parse results, and the per-aircraft profile described in Section 4 are retained for the life of the associated aircraft record. Deleting an individual document removes that document's file, extracted text, and structured parse results. Deleting an aircraft removes the aircraft's profile and all associated documents and extracted content.
You have the right to:
To exercise these rights, contact us at support@tachminder.com.
We use cookies for authentication (session management) and analytics (Google Analytics 4, Microsoft Clarity). You can manage cookie preferences through your browser settings or our cookie consent banner.
TachMinder is not intended for children under 18. We do not knowingly collect personal information from minors.
TachMinder is operated from the United States. If you access the Service from outside the US, your information will be transferred to and processed in the United States.
We may update this Privacy Policy from time to time. Material changes will be communicated via email or in-app notification. The “Last Updated” date at the top reflects the most recent revision.
Privacy questions or data requests? Contact us at support@tachminder.com.
Preflight AI LLC
Washington State, USA