PURPOSE.

This advisory circular (AC) provides aircraft operators with information and guidance for assistance in compliance to Title 14 of the Code of Federal Regulations (14 CFR) part 91, section 91.21. Section 91.21 was established because of the potential for portable electronic devices (PED) to interfere with aircraft communications and navigation equipment. It prohibits the operation of PED's aboard U.S.-registered civil aircraft, operated by the holder of an air carrier operating certificate, an operating certificate, or any other aircraft while operating under instrument flight rules (IFR). This rule permits use of specified PED's and other devices that the operator of the aircraft has determined will not interfere with the safe operation of the aircraft in which it is operated. The recommendations contained herein are one means, but not the only means, of complying with section 91.21 requirements, pertaining to the operation of PED's.