The Aircraft Technical Logbook (Tech Log) is the primary, mandatory record used to document the technical status of an aircraft during operation. It provides a continuous record of aircraft utilization, maintenance actions, and airworthiness status, ensuring compliance with aviation regulations and supporting safe flight operations.
Key Functions
Operational Record
Records each flight’s details: date, departure and arrival points, flight/engine hours, cycles, fuel uplift, and crew signatures.
Airworthiness Control
Displays the current Certificate of Release to Service (CRS) for the aircraft.
Shows deferred defects and maintenance carried forward.
Defect Reporting
Pilots record any aircraft defect, malfunction, or abnormal event during operation.
Enables clear communication between flight crew and maintenance personnel.
Maintenance Record
Engineers/technicians record troubleshooting, corrective actions, and rectifications.
Any work carried out must be certified by an appropriately licensed engineer.
Regulatory Compliance
Required by ICAO Annex 6 and most national aviation authorities.
Must be retained and archived according to authority-approved procedures.
Deferred defect list: if not rectified immediately (MEL/CDL reference).
Fuel and Oil Records
Certificates and Authorizations (CRS, maintenance release)
Signatures (captain, licensed engineer, dispatcher as applicable)
Importance in Operations
Serves as the legal document for proving airworthiness before each flight.
Ensures a traceable history of all defects, rectifications, and deferrals.
Acts as the communication link between pilots, engineers, and operations control.
Supports safety audits, accident investigations, and maintenance planning.
👉 In short: The Aircraft Technical Logbook is the official, authoritative record that bridges flight operations and maintenance, ensuring the aircraft remains safe, serviceable, and compliant at all times.
หนังสือ A Pilot Books ในรูปแบบ eBook ที่ MebMarket
