747focal,
The 747-400 was not tested in a full evac. What has been demostrated in a real emergency with the 747-400 is that these slides will inflate inside the cabin during an emergency, this happened with teh SQ006 accident pinning crew in the cabin between the inflated slide and the fuselage.
Not all exit types on the 747-400 were test in demostrated tests, alayss was used to say.
In some configurations, the 747 is certified to use "19 persons on upper deck equipped with emergency descent reels and harnesses" these were never demostrated.
If you look at "TYPE CERTIFICATE DATA SHEET NO. A20WE" for the 747 you will note that the FAA wrote a "letter" known as "Special Condition No. 25-71-NW-3" which allows for increased numbers on the upper deck.
Correct me if I am wrong, the 747-100 was demostrated with 4 pair of Type "A" exits on main deck, by anaysis this was increased to 550 pax by using 5 pair of Type "A" exits on main deck.
e.g
4 pair 440 pax
5 pair 550 pax
i.e 1 pair 110 pax, counting 50% loss of doors, 110 people per door.
eal401,
Main deck 747 capacity is dependant on the number of pairs of Type "A" exits on main deck, 440 for four pair, 550 for 5 pair.
