Hi Earl

Thank you for your answer.

As a aircraft technician (F 4 phantom), I understand the mechanical failures.

I don't have enough electric knowledge.
I would like to know what are the theoretical electric failures that can appear in electric motors, and after how many flights it happens.
I heared that the motor's magnets theoreticaly gets weak during time, is that true? can it appear in a period of possible use of electric motor (2000 flights)?

Thanks in advance

Isaac Najary