Which op check follows the completion of o-level maintenance action?

• A. Following o-level maintenance action
• B. Pre-flight check
• C. In-flight check
• D. After engine start

Answer: (A)

The key idea is that after completing o-level maintenance actions, you perform an operational check to verify that the maintenance work was completed correctly and that the affected systems function properly before the aircraft returns to service. This op check serves as the immediate verification step to catch any issues introduced by the maintenance and to confirm the aircraft is ready for safe use.

Pre-flight checks are broader safety scans done before flight, not the specific verification immediately after maintenance. In-flight checks are done during flight, and checks after engine start relate to procedures during or after starting the engine rather than the general post-maintenance verification. Hence, the process that follows completion of o-level maintenance action is the op check that occurs immediately after the maintenance action.