I'd like to say something about the lack of comms. As pilots, we are always taught to do the following steps in any emergency:
1) Fly the aircraft, i.e. regain control of the aircraft
2) Communicate, tell someone. Mayday calls need not be made on 243 or 121.5, switch only when time permits
3) orientate and subsequent actions.
However many times pilots train in the simulator, when an actual emergency happens, especially in the most benign portion of the flight, there is usually the mental inertia/shock to realise what is happening. We see this in MANY accidents and often wonder how a seemingly simple emergency can cause the inaction or wrong actions by the crew to worsen the recovery actions.
I'd been part of several accident investigations and this is replayed many times. Even in minor incidents, pilots may be unwilling to call out for a simple reason, they don't want to unnecessarily raise alarms. Many have to be taught to call out first, and downgrade the emergency later.