1011AA. From what I understand there was no special hydraulic lift, simply a forklift under the engine change/transport stand with the intent of engine and pylon removal.
The simple flaw was un expectected stress to the tombstone or FWD pylon to wing connection. To my knowledge they did this w/o any measure of weight. The common practice now is to use chain hoists or a special hyd lift with dyno's to measure the stress applied to the pylon (measure engine weight before disconnect from the pylon as null weight).