It is very important to document any maintenance activity. The
documentation is proof of the time and type of maintenance
performed.
View page
The Creators are putting new things on every time it says
maintenance.
View page
If you attend Aircraft maintenance school full-time the average
time it will take you to complete and graduate is about 2
years.
View page
WikiAnswers undergoes maintenance periods of time to install
major new features. The site will usually be available to view, but
not edit for the period of time.