The Technical Log is used for day-to-day operations and may be paper based as shown below or electronic on a tablet. Either is acceptable when performing a technical records review at the end of lease.
Technical Logs can be used to check non routine maintenance such as damage evaluations / repairs, modifications or any components replaced as a result of a defect. Note that any changes should also be reflected by the STATUS REPORT for the aircraft.
With a change of modification on the aircraft can come a change in maintenance requirements and so this is important to verify.