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At EOC'23, Pratt and Whitney Canada wanted to spread that word that some FADEC units in the field have faulty Low Voltage Power Supply (LVPS) microcircuits that can lead to NO DISPATCH conditions.

Phenom 100: SB 66082
Phenom 300: SB 30560

Not all planes are affected - for the Phenom 300 about 60 planes are effected (I am not sure on the Phenom 100 - don't have access to the SB).

PWC released these SBs in 2020, but currently only 30% of the affected fleet has complied with the SB. The warranty campaign was supposed to have expired by now, but they extended it through 2023 (possibly longer).