Can someone please explain the idea of core lock to me. From what I understand it means the engine components change size and do no longer fit as designed. Is this from a cooling or heating? After a flame out at high altitude are you in a situation where core lock could occur immediatley? Why do we maintain optimum relight speed? If the metals where going to change size wouldnt it happen regardless of speed.
This question may be stupid but this symptom is new to me..
Thanks