Section 121.576

14 CFR Ch. I (1-1-19 Edition)

of any person to comply with paragraph (a) of this section, or of any disturbance caused by a person who appears to be intoxicated aboard any of
its aircraft.
[Doc. No. 6258, 29 FR 19219, Dec. 31, 1964, as
amended by Amdt. 121-118, 40 FR 17552, Apr.
21, 1975; Amdt. 121-178, 47 FR 13316, Mar. 29,
1982; Amdt. 121-275, 67 FR 31932, May 10, 2002]

Section 121.576 Retention of items of mass in
passenger and crew compartments.
The certificate holder must provide
and use means to prevent each item of
galley equipment and each serving
cart, when not in use, and each item of
crew baggage, which is carried in a passenger or crew compartment from becoming a hazard by shifting under the
appropriate load factors corresponding
to the emergency landing conditions
under which the airplane was type certificated.
[Doc. No. 16383, 43 FR 22648, May 25, 1978]

Section 121.577 Stowage of food, beverage,
and passenger service equipment
during airplane movement on the
surface, takeoff, and landing.
(a) No certificate holder may move
an airplane on the surface, take off, or
land when any food, beverage, or tableware furnished by the certificate holder is located at any passenger seat.
(b) No certificate holder may move
an airplane on the surface, take off, or
land unless each food and beverage
tray and seat back tray table is secured in its stowed position.
(c) No certificate holder may permit
an airplane to move on the surface,
take off, or land unless each passenger
serving cart is secured in its stowed position.
(d) No certificate holder may permit
an airplane to move on the surface,
take off, or land unless each movie
screen that extends into an aisle is
stowed.
(e) Each passenger shall comply with
instructions given by a crewmember
with regard to compliance with this
section.
[Doc. No. 26142, 57 FR 42674, Sept. 15, 1992]

Section 121.578 Cabin ozone concentration.
(a) For the purpose of this section,
the following definitions apply:

(1) Flight segment means scheduled
nonstop flight time between two airports.
(2) Sea level equivalent refers to conditions of 25 SectionC and 760 millimeters of
mercury pressure.
(b) Except as provided in paragraphs
(d) and (e) of this section, no certificate holder may operate an airplane
above the following flight levels unless
it is successfully demonstrated to the
Administrator that the concentration
of ozone inside the cabin will not exceed - 
(1) For flight above flight level 320,
0.25 parts per million by volume, sea
level equivalent, at any time above
that flight level; and
(2) For flight above flight level 270,
0.1 parts per million by volume, sea
level equivalent, time-weighted average for each flight segment that exceeds 4 hours and includes flight above
that flight level. (For this purpose, the
amount of ozone below flight level 180
is considered to be zero.)
(c) Compliance with this section
must be shown by analysis or tests,
based on either airplane operational
procedures and performance limitations or the certificate holder-s operations. The analysis or tests must show
either of the following:
(1) Atmospheric ozone statistics indicate, with a statistical confidence of at
least 84%, that at the altitudes and locations at which the airplane will be
operated cabin ozone concentrations
will not exceed the limits prescribed by
paragraph (b) of this section.
(2) The airplane ventilation system
including any ozone control equipment,
will maintain cabin ozone concentrations at or below the limits prescribed
by paragraph (b) of this section.
(d) A certificate holder may obtain
an authorization to deviate from the
requirements of paragraph (b) of this
section, by an amendment to its operations specifications, if - 
(1) It shows that due to circumstances beyond its control or to
unreasonable economic burden it cannot comply for a specified period of
time; and
(2) It has submitted a plan acceptable
to the Administrator to effect compliance to the extent possible.

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