Surprised how a few people on here have mentioned doing the airlines before the legs when dropping a trailer. My outfits SSOW says to do this and I have always found it odd, forgetting the legs & dropping a trailer is the worst possible outcome so surely eliminate that first.
Occasional human error is inevitable & if a drivers going to get distracted and miss something, best its the airlines in my eyes. No good some driver trainer wagging his finger pointing at the SSOW you didn’t follow, when a loaded trailers on it’s knees shot to bits & needing a wrecker to pick it up.