Provides a summary of and information on small propeller-driven air taxi airplanes that comply with section 135.169(b) and may continue operations under FAR 135 with ten or more passenger seats.

To provide guidance to commuter/air taxi operators to assist them to comply with Section 135.227.

Contains information and recommendations to assist pilots in conducting ground operations during weather conditions conducive to aircraft icing.

Helicopters provide a means of transporting people in urgent need of medical assistance. These operations are unique due to the urgent nature of the flight.

This AC provides information concerning the placement of aircraft into service for Title 14 of the Code of Federal Regulations (14 CFR) part 135 commuter and on demand operations.

Provides recommended security measures applicable to ATCO operations that should minimize the effects of crimes directed against air transportation.

This AC provides one means, but not the only means, of complying with FAR Sections 135.227, 135.345, & 135.351 (referred to as the FAR Part 135 ground deicing rule).

Provides information and guidance material which may be used by Air Ambulance and Emergency Medical Service/Airplane (EMS/A).

This advisory circular (AC) provides certificate holders with guidance for obtaining operational approval to conduct Extended Operations (ETOPS) under Title 14 of the Code of Federal Regulations (14 CFR) part 135.

This advisory circular (AC) provides information for establishing methods acceptable to the Administrator for compliance with the additional maintenance requirements of Title 14 of the Code of Federal Regulations (14 CFR) part 135, § 135.421 for certain air carriers and commercial operators.