You say that the planes are safe because neither FAA nor DGAC has grounded them or because you know people inside the airline and they tell you it??s safe?
So; I only have two reasons to choose from? Okay... I'll make my point...
Whatever might be said by a line mechanic or the Director of Maintenance will without a doubt fall in the zone of subjectivity. Our appreciations and conclusions upon someone else's comment tend to be far from what it is true. Remember that what "X" conceive as good might not concurr with "Y" opinion. It is a matter of perspective. An issue that couldn't be more distant of the scientific method.
I will refer to the only objective, technical and suitable-to-be-proved sources: The adherence to directives, the elaboration and application of manuals and all the black and white stuff; inspections, training, etc -all which fall in the jurisdiction of the Aviation Authorities-, are created and enforced to insure the safety of the air transportation industry.
The faithful adherence to that complex system of regulations (which Aerocalifornia has not failed to comply with, as per the same Authorities) as a reason on whether flying an airline or not -opposed to a gut feeling- for me has way more value.
There are no stupid questions... just stupid people!