One thing i don't yet fully understand with MNM alt. requirements on SID charts is:
If for example at EGLL on the BPK6 SID where crossing the LON/300 radial at MNM 3500' is a requirement what happens if this cannot be achieved by a heavy 744?
Can the procedure vary on the same SID between different Airlines/SOPs?
I know BA on the 744 do T/O on flaps 20, climb flaps 10 to 4000' to meet the MNM alt. requiements and then continue acceleration and cleanup.
On the other hand I've been told CX does T/O on flaps 10, Climb on flaps 5. And at 4000' accel and cleanup.
Now is only the MNM 4000' a requirement or also the MNM 3500' (3000' on most other SID's)
Are these alts. always achieved? do they have to be achieved?
I am only 16 so some insight on this would be great!
Leo
