b757 door mechanism bearing replacement ,what a night mare, has to be done nearly every c-check on at least 2 doors.
you also need need hands of a baby to get through the small access holes.
also changing the r/h engine P R S O V.with the special pri-bar tool.
apart from that not a bad kite....
b737 classic inbd flap boom cables ,tring to figure out how it fits around the pulley system,always a good job for the new boy in the hangar.