Originally Posted by Rainboe
Even a max weight take-off on a 747-400 had no problem with any minimum altitude restrictions at LHR. The old 747-100/200s on a Burnham departure for Anchorage could not make 3000' at Burnham (10 miles away). It was always about 2800', but the 747-400, even going long range to HKG or SIN has no problem.
Hence Timothy's classsic (on routing in his Aztec BURHAM-ASCOT):-
Originally Posted by Thames Radar
(they should inform us before they depart if they cannot make 243ft/nm!)
I was once on this route when a 747 lost a donk on takeoff. You guys were on to me like a ton of bricks - "IMMEDIATErightturnonto270toleavecontrolledairspacecautionWh iteWalthamzonedescendNOWtominimumsafealtitudetrafficisa747in your80clockdoyouhaveitvisual " or something very much like that!
http://www.pprune.org/private-flying...tml#post916022 