Once and for all:
LHSebi, don't be so thin-skinned. This subject has been discussed to death and some of us that have to work on the avionics and constantly explain to the aircrew members what is and isn't wrong with their planes are getting a bit fed up...
Rducky, Pay attention!
Title 14: Aeronautics and Space
PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND
Subpart K—Instrument and Equipment Requirements
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§ 121.306 Portable electronic devices.
(a) Except as provided in paragraph (b) of this section, no person may operate, nor may any operator or pilot in command of an aircraft allow the operation of, any portable electronic device on any U.S.-registered civil aircraft operating under this part.
(b) Paragraph (a) of this section does not apply to—
(1) Portable voice recorders;
(2) Hearing aids;
(3) Heart pacemakers;
(4) Electric shavers; or
(5) Any other portable electronic device that the part 119 certificate holder has determined will not cause interference with the navigation or communication system of the aircraft on which it is to be used.
(c) The determination required by paragraph (b)(5) of this section shall be made by that part 119 certificate holder operating the particular device to be used.
[Doc. No. FAA–1998–4954, 64 FR
1080, Jan. 7, 1999]
Incidentally, row 16 is a very good place to cause interference. Especially in a 757 as that is where the fuel quantity wiring enters the fuselage and has many shield junctions which may become defective with age.
One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533