The -300 has fuel jettison. Unsure if this is standard or an option. Dumps from Centre tank only at @ 1100 kg/min. With 37.0T in the (full) wings and a typical ZFM of 120.0 that would leave you over MLM of 145,149 kg, probably even after a low level / high drag transit to LGW. I'm assuming that DL would have had > full wings for a run to Whereverville USA. The LDA at LGW is considerably shorter than MAN but is still long enough at MLM.
The Truck Tilt forms part of the Air Ground Logic and, as stated previously, prevents gear retraction if inop.
Would probably have been good to have a 3rd brain in the Checker - use of resources etc (rather than the 1/3rd brain of the pin theorist).
