A beginner's doubt on jet engines

Ramapriya wrote:

PS: Don't know if they trolled me, but both the pilots today didn't
seem to know much of the CFM56's internals.

Perhaps they don't know that much about the internals. Ernest Gann said he never
understood why American Airlines felt it necessary that he be able to answer
detailed questions about the workings of the radial engines he flew behind. He
couldn't imagine climbing out on the wing to affect repairs in flight, though he
said "there would be times when I fervently wished it were possible."

George Patterson
The desire for safety stands against every great and noble enterprise.