You have to determine what is the limiting factor of TOR Required against TOR Available, TODR against TODA and ASDR against ASDA.
These factors must be considered for all engines operating and compared with the requirements for the loss of one engine at the most critical point.
Also requirements change for a wet runway (screen height 15ft versus 35ft on dry).
Typically a 4 eng a/c will be limited by the all engines operating case as opposed to the 1 engine inop case.
If you p.m me I could send you further info.
Last edited by 4PON4PIN; 16th May 2008 at 11:01.
Reason: To expand slightly