135.127 Passenger information requirements and smoking prohibitions.
(a) No person may conduct a scheduled flight on which smoking is
prohibited by part 252 of this title unless the “No Smoking” passenger
information signs are lighted during the entire flight, or one or more “No
Smoking” placards meeting the requirements of §25.1541 of this chapter are
posted during the entire flight. If both the lighted signs and the placards
are used, the signs must remain lighted during the entire flight segment.
(b) No person may smoke while a “No Smoking” sign is lighted or while “No
Smoking” placards are posted, except as follows:
(1) On-demand operations. The pilot in command of an aircraft
engaged in an on-demand operation may authorize smoking on the flight deck
(if it is physically separated from any passenger compartment), except in
any of the following situations:
(i) During aircraft movement on the surface or during takeoff or landing;
(ii) During scheduled passenger-carrying public charter operations
conducted under part 380 of this title;
(iii) During on-demand operations conducted interstate that meet
paragraph (2) of the definition “On-demand operation” in §119.3 of this
chapter, unless permitted under paragraph (b)(2) of this section; or
(iv) During any operation where smoking is prohibited by part 252 of this
title or by international agreement.
(2) Certain intrastate commuter operations and certain intrastate
on-demand operations. Except during aircraft movement on the surface or
during takeoff or landing, a pilot in command of an aircraft engaged in a
commuter operation or an on-demand operation that meets paragraph (2) of the
definition of “On-demand operation” in §119.3 of this chapter may authorize
smoking on the flight deck (if it is physically separated from the passenger
compartment, if any) if—
(i) Smoking on the flight deck is not otherwise prohibited by part 252 of
(ii) The flight is conducted entirely within the same State of the United
States (a flight from one place in Hawaii to another place in Hawaii through
the airspace over a place outside Hawaii is not entirely within the same
(iii) The aircraft is either not turbojet-powered or the aircraft is not
capable of carrying at least 30 passengers.
(c) No person may smoke in any aircraft lavatory.
(d) No person may operate an aircraft with a lavatory equipped with a
smoke detector unless there is in that lavatory a sign or placard which
reads: “Federal law provides for a penalty of up to $2,000 for tampering
with the smoke detector installed in this lavatory.”
(e) No person may tamper with, disable, or destroy any smoke detector
installed in any aircraft lavatory.
(f) On flight segments other than those described in paragraph (a) of
this section, the “No Smoking” sign required by §135.177(a)(3) of this part
must be turned on during any movement of the aircraft on the surface, for
each takeoff or landing, and at any other time considered necessary by the
pilot in command.
(g) The passenger information requirements prescribed in §91.517 (b) and
(d) of this chapter are in addition to the requirements prescribed in this
(h) Each passenger shall comply with instructions given him or her by
crewmembers regarding compliance with paragraphs (b), (c), and (e) of this