Thanks for proving my point
For maximum diversion times above 180 minutes there is a requirement to consider 2 cases.
(1) an area which is a function of the all engine operating cruise speed at normal cruise altitude, corrected for wind and temperature and the most limiting capability of the cargo and baggage compartment fire suppression system time minus 15 minutes.
(2) an area which is a function of the single engine inoperative cruise speed at driftdown altitude, corrected for wind and temperature and the most limiting system (not including cargo and baggage compartment fire suppression system) time minus 15 minutes.
Admittedly the second requirement would normally be the most limiting but the point is that diversion times can exceed the 120/180/240 mins
Last edited by BGQ; 28th Dec 2013 at 10:40.