Once the maintenance work and system testing have been completed, the
flight director sends out a message to the company, informing everyone that
service should now be fully restored. The message briefly outlines the main
successes of the maintenance window and briefly lists any services that are
known not to be functioning and when they will be fixed.
This message should be in a fixed format and written largely in advance,
because the flight director will be too tired to be very coherent or upbeat to
write the message at the end of a long weekend. There is also little chance
that anyone who proofreads the message at that point is going to be able to
help, either.