Unable to climb? Check for concrete blocks hidden under the floorboards? Goats' eating through the control cables?
(Actually, this sounds to be a difficult problem to solve. Presumably the throttle and air mixture were right. Was there a freakish low pressure system over the Andes?)
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Regarding the crash on takeoff out of Vicco. The flight time was 1:01. The rules say 1:00 for the takeoff run. Part of the problem is the longer takeoff run at altitude--which was not properly anticipated. In any case, this does really look to be a takeoff crash and thus have earned a "2 point" penalty.
In the highly competitive RTWR, this would likely be a four-point penalty--because rules are rules. For our fun event, take two points as this incident fits the intent of the lesser penalty.
BTW. As per the rules for the CCAA, pilots may make any number of intermediate stops as long as they carry the cargo the full way, authenticate the intermediate legs and count the time, fuel and maintenance for those legs.