I was getting a simulator ride in a 727 sim, way back when I was a 727 first officer (after being trained in Boeing Seattle as a 727 second officer [sort of a flight engineer], and then being an instructor for four or five years). W/ my Hercules 'time' I had more experience than the captain had, and at the end of the sim-ride the check-pilot asked if I wanted to do anything else, as we had about 15 minutes left, so I said "set me up at 3,000', 10 or 15 miles back, 250 Knots, fail ALL THREE (w/out needing to complete the checklists) and see IF I can make the runway. My plan was to stay as 'hot' as I could till CERTAIN I'd "make the runway", then flaps and 'gear, still HIGH and 'hot', then use speed-brakes to ensure the runway.
The 727 had a prohibition against speedbrakes and flaps at the same time, because of the number of 727s that got into a high-sink rate and crashed when it was new, w/ pilots experienced on prop-jobs like the DC6, not realizing how long it takes to get jet engines "spooled-up" from idle. During my Seattle course my Boeing instructor had shown me that the 727 had been CERTIFIED TO USE FLAPS AND SPEEDBRAKES at the same time, but that the prohibition had been the EASIEST way to 'remove the high sink-rate problem'.
When I selected the speedbrakes the captain hollered "NO - that's prohibited!" but I kept my hand on the lever - while the check-pilot said "It's OK - let Ed try it...!" We continued to a non-eventful landing, and then the captain asked "Can I do the same approach, but I won't break the rules?"
So a button was pushed and MAGICALLY we were at 3,000', 10 or 15 miles back, 250 Knots, ALL THREE failed [SAME everything as what I'd just had], and the captain continued, NOT doing what I'd just demonstrated WORKED
, and we 'crashed' a few miles short of the runway.
We had a very interesting debriefing....