Safety
Single-engine Part 135 Electrical Requirements Clarified
Some operators are confusing Part 23 with Part 135 requirements

The FAA on January 27 published updated guidance - for agency inspectors and hence operators on emergency electrical requirements for Part 135-operated single-engine aircraft flying in instrument conditions. The agency’s Flight Standards Division (AFS-200) believes some operators are not aware of the differences between the emergency electrical equipment requirements of the original Part 23 certification standards and those of Part 135.163(f). Some single-engine aircraft operators, according to the FAA, erroneously believe Part 23 requirements offer them enough redundancy to meet their requirements under Part 135.