After some thought, I think I agree with those suggesting that the only missing element is declaring emergency. And for the reasons cited. First, it alerts ATC that there IS a problem, one that they should prepare for - by rolling the equipment and other details. (Turns out that the equi. was needed...) Truly sad to says it, but the truth is, in today's flying environment a certain amount of CYA IS necessary. Declaring it an emergency provides that CYA for the crew as well as giving them many more options about where to fly, how and when to turn and whatever runway they deem best for their instant needs.
Otherwise, getting it back on the ground with no injuries and no (new) damage is kinda-mebbie-sorta all that matters. I'd call it a Good Day for all on EI110.