Not for one moment suggesting that it was the case here, but I remember instructing the baby AEMs at Culdrose many years ago and found an interesting situation.
We went "up top" on a cab to do a little AFS instruction and found not only the incorrect SWG tell tale wire (emergency escape thickness), but the chap who had wirelocked it had failed to set the system first (power on etc). So there we were with taut wire of the incorrect SWG on a shut down engine (OTG "off" position).
We ended up doing a trawl and found others too, but usually they couldn't understand why they were finding broken wire on every AF.
Glad your safe
Cheers