Commercial Passenger-Carrying Operations in Single-Engine Aircraft Under Instrument Flight Rules

This action revises and clarifies certain conditions and limitations in part 135 for instrument flight rule (IFR), passenger- carrying operations in single-engine aircraft. The clarification is necessary to resolve ambiguity in the current rule regarding the requirement for redundant power for gyroscopic instrumentation. The intended effect of the action is to remove any ambiguity concerning the required power sources for the gyroscopic instruments required for flight under IFR for single engine aircraft involved in commercial, passenger-carrying operations. This action also advises the public of the information collection approval by the Office of Management and Budget (OMB), withdraws SFAR 81 because the SFAR could not be placed in effect with a readily apparent ambiguity, adds the OMB control number to part 11, and amends part 135.