I couldn't think of a good way to search my question so here it goes.
Lets say the annual is due by end of December and you begin the annual in December, but due to some repair or other factor the annual is not completed until the February and the plane is grounded the whole time. Is the next annual due in December or February?
Lets say the annual is due by end of December and you begin the annual in December, but due to some repair or other factor the annual is not completed until the February and the plane is grounded the whole time. Is the next annual due in December or February?