rwm Agree with the f-28,even the stab actuator couldn't be done by the book,another one for the 727-200 were the stupid pre-coolers in the pylon,changing the fish plates in the wing centre section and then rigging the gust-lock on the F27,BAE 146 (one aisle,four engines,needs six)The 737 airstairs were a pain but I recon the DC-9 was more of a nightmare.Sounds like the Bell is a bit like the Sikorsky !!The trick I discovered (if the right sealant was used)for removing the leading edges was to use a hairdryer and start at the inboard end.I had to many (heated)discusions with BAE in the late 80's and early 90's regards systems ops (including MELS)so it has to be my most hated !!
Cheers