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 and guidelines to Title 14 of the Code of Federal Regulations (14 CFR) part 135 air carriers/operators to aid in the development of a Second in Command Professional Development Program (SIC PDP) which meets the requirements of part 135, § 135.99(c).

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

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).

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 AC provides information and recommendations to air carriers operating under the authority of Title 14 of the Code of Federal Regulations (14 CFR) part 135 and in the noncontiguous States (i.e., Alaska or Hawaii) on the use of noncertified weather information in support of instrument approaches conducted under instrument flight rules (IFR) at airports without destination weather reporting approved by the National Weather Service (NWS) or the Federal Aviation Administration (FAA).

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.

This AC provides information and guidance for a Title 14 of the Code of Federal Regulations (14 CFR) part 135, § 135.419, Approved Aircraft Inspection Program (AAIP).