An aircraft maintenance check performed approximately every 500-800 flight hours or 200-400 cycles.

Verify condition or status regularly.

Examine, borrow, or leave premises.

Maintaining control or restraint over.

Selectable box for indicating choices.

Confirm presence or status update.

List for verifying task completion.

Symbol indicating task completion, approval.

Examine health or condition periodically.

Prevents fluid from flowing backwards.

Register or investigate something thoroughly.

Assessment of situation for truth.

Mark as completed or done.

Verify accuracy or correctness by comparison.

Verify accuracy or correctness again.

Unrestricted financial or operational authority.