Actually a wonderful illustration of how aircraft maintenance has moved in to the new era.....from my experience (30 years Licence Holder) people often look at the 'highly technical' answer to a defect, particularly if the problem is highlited in some form of maintenance computer. (CMC), when in fact some good old fashioned common 'dog' would show the problem for what it really is.
In a past life one of our contracted maintenance crews on B744, one aircraft returned from flight, gear would not raise when selected...problem shows up in CMC saying an issue with the PSEU (black box interpreting the switches on the gear)....So lots of cards changed and test OK....off you go again.....gear not go up......should have tried to look for the hole in the pipe line to one of the truck tilt actuators, but not in the book...so not looked at ....an expensive error if you ask me as this problem was common on the Classic 747 and a bit of common sense would say truck not tilting stopping gear from raising......