An annular combustion chamber for a gas turbine engine is disclosed. Flagging the electronic mail messages allows for various notifications to be provided to the sender. Engagement of the lockup clutch is controlled as a function of an inertia of an engine associated with the torque converter, a torque applied by the engine to the pump, the rotational speed of the turbine, the pump speed profile, and the pump acceleration profile. A pin is biased against the plunger and movable between a pin first position and a pin second position and locks the plunger in the plunger second position when the pin is in the pin second position.