Originally Posted by
kenparry
BAL at Luton was not a 3-month differences course. My recollection is a couple of days ground school, one sim shared between 2 students, and I think 4 line sectors including the line check. So, a total of around 4-5 working days.
That was when 757 & 767 were separate type ratings. Later, when they became a common type rating, it was perhaps an even shorter course.
Unless my memory is faulty, the 757 and 767 had common type ratings when the 757 entered service (~1 year after the 767) - at least with the FAA. Perhaps your authority was a little late to the party...