Originally Posted by
Ancient-Mariner
In underfire's picture, please what is the difference between an EDG - Electric Drive Generator and a PMA - Permanent Magnetic Alternator?
Again, not particularly familiar with the PW1100, but Pratt routinely uses a PMA to power the FADEC. FADEC power is separate from the aircraft Generator so that the FADEC will remain powered (and able to control the engine) regardless of whatever failures might affect the aircraft electrical power system.