Please excuse a question from a layman but does the purported inability to shut down number 1 necessarily mean that it would've been unresponsive to changes in thrust setting, and would've been at its last known setting (climb power?) before the failure of number 2 and associated damage?
If so, how would this anomalous status of number 1 affect the subsequent approach and landing? Is the scenario of a three engine landing with one of those engines stuck on climb thrust one that comes up in simulator training and is covered in documentation? Or would the crew have been largely "improvising" with this approach?