AMC2 145.A.48(c)(2) Performance of maintenance   

CAA ORS9 Decision No. 38

CRITICAL MAINTENANCE TASKS

1. The procedure should ensure that the following maintenance tasks are reviewed to assess their impact on flight safety:

   1. tasks that may affect the control of the aircraft flight path and attitude, such as installation, rigging and adjustments of flight controls;

   2. aircraft stability control systems (autopilot, fuel transfer);

   3. tasks that may affect the propulsive force of the aircraft, including installation of aircraft engines, propellers and rotors; and

   4. overhaul, calibration or rigging of engines, propellers, transmissions and gearboxes.

2. The procedure should describe which data sources are used to identify critical maintenance tasks. Several data sources may be used, such as:

   1. information from the design approval holder;

   2. accident reports;

   3. investigation and follow-up of incidents;

   4. occurrence reporting;

   5. flight data analysis, where this is available from the person or organisation responsible for the aircraft continuing airworthiness;

   6. results of audits and independent inspections;

   7. monitoring schemes for normal operations, where these are available from the person or organisation responsible for the aircraft continuing airworthiness;

   8. feedback from training.