There has been plenty written about that B747 incident. I have seen a re-creation in a simulator. For aspiring airline pilots suffice it to say that in any abnormal situation someone has to fly the aircraft. You know, the basics….
He or she has to keep a safe airspeed and if an engine is lost at high altitude that will mean starting a descent. The yaw will have to be countered by applying some rudder. Wings level, ball in the centre. It is called flying.
Then while someone is flying, the other(s) can open the book, try to restart or secure, consider terrain, alternate airports, get on the radio etc etc.
For student pilots, you will be shown what a spiral dive looks like; increasing airspeed and bank angle and high rate of descent. Reduce power, level the wings and ease out of the dive.
You will have to demonstrate the same recovery prior to getting an instrument rating without outside reference. You will also have to demonstrate remaining in control, by hand and foot following engine failures in multi engined aircraft, securing the engine by following some procedures by memory. This will have to be done on instruments without outside reference for multi engined instrument ratings.
Wings level, ball in the centre, maintain correct speed, get rid of drag (landing gear) etc dead foot, dead engine etc etc.
It is called flying.
You will be shown how to recover from a stall and how not to get into a spin.
You can also get spin training. In a spin the airspeed starts low and stays low.
Some aeroplanes can be gotten into a spin but will not stay there long - they can transition into a spiral dive, airspeed increasing etc as above with the same recovery.
I think this is what happened to that 747. The pilot flying let the airspeed decay and did not counter the asymmetry with rudder. The a/c stalled and a wing dropped. The aircraft then transitioned into a spiral dive.
In the re-creation I saw both Captain and FO thought that their respective Attitude Indicators had failed simultaneously when the wing dropped! “I lost my horizon!” “I lost my horizon too!”
Luckily the cloud base was high enough for them to recover when visual reference was gained. But high g was put on the airframe and bits and pieces came off in the process.
Remarkable aeroplane the Boeing 747!