206 

14 CFR Ch. I (1–1–19 Edition) 

§ 121.576 

of any person to comply with para-
graph (a) of this section, or of any dis-
turbance caused by a person who ap-
pears 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] 

§ 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 pas-
senger or crew compartment from be-
coming a hazard by shifting under the 
appropriate load factors corresponding 
to the emergency landing conditions 
under which the airplane was type cer-
tificated. 

[Doc. No. 16383, 43 FR 22648, May 25, 1978] 

§ 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 table-
ware furnished by the certificate hold-
er 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 se-
cured 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 po-
sition. 

(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] 

§ 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 air-
ports. 

(2) 

Sea level equivalent 

refers to condi-

tions of 25 

°

C and 760 millimeters of 

mercury pressure. 

(b) Except as provided in paragraphs 

(d) and (e) of this section, no certifi-
cate 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 ex-
ceed— 

(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 aver-
age for each flight segment that ex-
ceeds 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 limita-
tions or the certificate holder’s oper-
ations. The analysis or tests must show 
either of the following: 

(1) Atmospheric ozone statistics indi-

cate, with a statistical confidence of at 
least 84%, that at the altitudes and lo-
cations 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 concentra-
tions 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 oper-
ations specifications, if— 

(1) It shows that due to cir-

cumstances beyond its control or to 
unreasonable economic burden it can-
not comply for a specified period of 
time; and 

(2) It has submitted a plan acceptable 

to the Administrator to effect compli-
ance to the extent possible. 

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