This advisory circular (AC) describes an acceptable means for showing compliance with the requirements of Title 14, Code of Federal Regulations (14 CFR) 121.321, Operations in Icing.  Part 121 contains the aircraft operating requirements applicable to domestic, flag, and supplemental operations.  This AC provides guidance for:

a.   Using visible moisture and temperature as a means for the flightcrew to know when the airframe ice protection system (IPS) must be activated.

b.   Developing acceptable procedures for activating and deactivating the airframe IPS.

c.    Installing a primary or advisory ice detection system.

Provides guidance for air operations and foreign air carriers when reporting to the FAA instances of noncompliance through the Voluntary Disclosure Reporting Program.

AC provides guidance to elaborate requirements for enhanced emergency medical equipment currently carried on most major air carriers and becoming mandatory as of April 12, 2004

Provides guidance regarding crewmember training programs (Flight attendant training program in particular) that incorporate Automated External Defibrillators (AED) and enhanced Emergency Medical Kits (EMK). (Also AC 121-33B, Emergency Medical Equipment).

This AC complements guidance already developed for flight crewmembers and other groups with respect to training in resource management. Focus is on the aircraft dispatcher whose traditional role in air carrier operations is being changed by fundamental changes in aviation, notably advanced technology.

Provides updated information regarding the items that are required to be covered in oral passenger briefings and on passenger briefing cards. Provides specific information about air carrier operations conducted under 14 CFR Part 121 and 135. It also provides suggestions for making this information interesting meaningful.

Provides guidance regarding air carrier procedures for the use of ventilation and ground based air conditioning on the ground, as well as management of passengers during ground operations with no cabin ventilation.

Provides guidance regarding air carrier passenger handling procedures for allergen-sensitive people, including the importance of crewmember training in recognizing and responding to medical events that result from allergen exposure.

Provides information to the public, certificated air carriers, commercial operators, and airline personnel about FAA-approved carry-on baggage programs. It updates, provides clarification and additional information on how to comply with the carry-on baggage regulations.

Provides methods acceptable to the FAA Administrator for FAR Part 121 certificate holders who conduct flag and supplemental operations to obtain an FAA finding regarding the adequacy of onboard sleeping quarters for compliance with FAR Sections 121.485(a) and 121.523(b). This AC also references FAA-acceptable criteria which may be used for the design and installation of flight crew sleeping quarters and rest facilities on commercial transport aircraft capable of long-range operations with augmented or enlarged flight crew complements.

Provides information relevant to the preparation and loading of magnetic materials for shipment in civil aircraft

Provides air carriers, freight forwarders, and shippers with sources of regulatory and training information and provides office locations and telephone numbers where technical assistance may be obtained dealing with the provisions of the appropriate regulations concerning the transportation by air of commodities which have been designated as regulated hazardous materials.

Provides guidance as to acceptable methods for compliance with changes to the Federal Aviation Regulations 121.97(b) and 121.117(b).

Provides guidance and standards to domestic and flag air carriers for approval of a system for obtaining forecasts and reports of adverse weather phenomena

Provides guidance for the preparation of an Operations Specification--Preface Page which will afford nominal and reasonable relief from approved service and overhaul time limits when a part is borrowed from another operator.

Sets forth an acceptable means for complying with rules (applicable to various persons operating under Part 121 of the Federal Aviation Regulations) that prescribe the installation of approved megaphones.