Originally Posted by
HalinTexas
Doubtful. Remember, the faster you go, the more drag, the greater the fuel burn. Likewise with lower altitudes. Different operators might use different speeds for the same type of aircraft. When computing ETPs, dispatch doesn’t have to include time and fuel for the turn or decent, nor APU operation. Use your FMC fuel calculations to the fullest extent. Sometimes dispatch planning can overlap “over water, extended overwater, flag and/or ETOPS” requirements, resulting in “re-releases.”
Fire suppression for every aircraft must be rated to exceed the Area of Operation, e.g. 195 minutes for 180 minute approval.
Some companies grant captains greater authority and latitude than others.
thanks for the response. Isn’t the EDTO fuel calculation at the ETP (CP) based on the OEI-approved diversion speed? (the same speed used to define the EDTO area of operation)
In our Ops Manual, this speed is referred to as the “Company Speed” or “OEI Approved Speed”, and we even see it on the FMC > VNAV E.OUT > COSPD prompt. That makes me think it’s more than just a planning tool.
My point is: I’m not totally convinced this speed is only for planning.