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By following this guide, you will add tools to the calibration tracking system, record calibration events, monitor due dates, upload calibration certificates, and manage tools that fall out of calibration.
Who should read this: Directors of maintenance, quality assurance managers, and tool crib managers responsible for ensuring all precision tools and measurement equipment are properly calibrated.Required permission: maintenance_ops — read to view, update to create and modify calibration records.Regulatory basis: 14 CFR 43.13(a) requires that each person performing maintenance, preventive maintenance, or alteration shall use the tools, equipment, and test apparatus necessary to assure completion of the work in accordance with accepted industry practices. Calibration of precision measurement equipment is an industry standard practice traceable to NIST standards.

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The Tool Calibration List

Navigate to Maintenance > Tool Calibration to see all tracked tools. The list shows: Status color coding:

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Add a Tool

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Record a Calibration Event

When a tool is recalibrated:
  1. Open the tool detail page
  2. Click Record Calibration
  3. Enter the new calibration date and next due date
  4. Enter the calibrating entity (person or laboratory)
  5. Upload the new calibration certificate
  6. Click Save — the status resets to Current
Maintain calibration certificates as permanent records. During FAA audits, inspectors may request calibration documentation for any tool used in maintenance performed under your certificate. Having certificates linked directly to the tool record simplifies this process.

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Handle Out-of-Calibration Tools

Tools that are past their calibration due date must not be used for precision maintenance work. Any maintenance performed with out-of-calibration tools may need to be re-inspected or re-accomplished, potentially affecting the airworthiness determination of the aircraft.
If a tool is found to be out of calibration:
  1. Immediately mark the tool as Out of Service
  2. Review recent work orders where the tool was used
  3. Assess whether the out-of-calibration condition could have affected any measurements
  4. If affected, document the finding and initiate corrective action
  5. Send the tool for recalibration or retire it

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Remove a Tool from Service

For tools that are damaged, lost, or retired:
  1. Open the tool detail page
  2. Change the status to Out of Service
  3. Document the reason (damaged, lost, retired, beyond economical repair)
  4. The tool remains in the system for historical reference but no longer triggers calibration due alerts

Manage Work Orders

Link calibrated tools to work orders for traceability.

Compliance Dashboard

Monitor tool calibration status alongside fleet compliance.

Technician Attestations

Verify technician credentials for maintenance sign-offs.

Record Integrity

Ensure calibration records are tamper-evident.
Last modified on April 5, 2026