bpp ... runway limit is irrelevant once airborne. Once the airplane is at 10000 feet it doesn't matter from where it took off. And at that altitude, 1600 AGL, the airplane was 50 tons below its max gross weight. A 3 engine climb at 327 tons is not critical. In fact, at that weight, for example, a GE powered CF6-50E2, at MCT could climb to and maintain FL270 at ISA +10c.
And "climb weight limit" beyond second segment 10 miles west of BOG near town of Madrid, [proximity of La Pincha airport] where the airplane crashed is also irrelevant because the elevation there is the same as at BOG. There is no higher terrain immediately west of the airport. The typical "emergency turn procedure," if required, at BOG has you flying west, circling within 10 miles, or circling over the field. Been there. Done all that.
If you go to Google Earth and run your curser west and west-northwest of BOG you may familiarize yourself with terrain elevations.