A-checks

A-checks belong to a higher level of scheduled maintenance procedures. Normally it is performed at a designated maintenance station on route and includes the opening of all access panels for checking and servicing certain items. Special tooling, test equipment and servicing is required.

Examples of A-check items include:

General external visual inspection of aircraft structure for evidence of damage, deformation, corrosion, and missing parts
Crew oxygen system pressure
Operation of emergency lights
Lubricating the nose gear retract actuator
The pressure of parking brake accumulator
Testing the Built-in Test Equipment (BITE) and Flap/Slat Electronics Unit.

A-checks

AOG support services
Daily, weekly and transit checks
Unscheduled services
A-checks
Defect rectification
Components change
Engineering
Aircraft engineering during livery change
Line station set-up and management services
Aircraft dismantling