117 

Federal Aviation Administration, DOT 

§ 121.317 

joint or fastener, which would affect 
the capability of the liner to safely 
contain a fire. 

(c) After March 19, 2001, each Class D 

compartment, regardless of volume, 
must meet the standards of §§ 25.857(c) 
and 25.858 of this Chapter for a Class C 
compartment unless the operation is 
an all-cargo operation in which case 
each Class D compartment may meet 
the standards in § 25.857(e) for a Class E 
compartment. 

(d) 

Reports of conversions and retrofits. 

(1) Until such time as all Class D com-
partments in aircraft operated under 
this part by the certificate have been 
converted or retrofitted with appro-
priate detection and suppression sys-
tems, each certificate holder must sub-
mit written progress reports to the 
FAA that contain the information 
specified below. 

(i) The serial number of each airplane 

listed in the operations specifications 
issued to the certificate holder for op-
eration under this part in which all 
Class D compartments have been con-
verted to Class C or Class E compart-
ments; 

(ii) The serial number of each air-

plane listed in the operations specifica-
tion issued to the certificate holder for 
operation under this part, in which all 
Class D compartments have been retro-
fitted to meet the fire detection and 
suppression requirements for Class C or 
the fire detection requirements for 
Class E; and 

(iii) The serial number of each air-

plane listed in the operations specifica-
tions issued to the certificate holder 
for operation under this part that has 
at least one Class D compartment that 
has not been converted or retrofitted. 

(2) The written report must be sub-

mitted to the responsible Flight Stand-
ards office by July 1, 1998, and at each 
three-month interval thereafter. 

[Doc. No. 28937, 63 FR 8049, Feb. 17, 1998, as 
amended by Docket FAA–2018–0119, Amdt. 
121–380, 83 FR 9173, Mar. 5, 2018] 

§ 121.315

Cockpit check procedure. 

(a) Each certificate holder shall pro-

vide an approved cockpit check proce-
dure for each type of aircraft. 

(b) The approved procedures must in-

clude each item necessary for flight 
crewmembers to check for safety be-

fore starting engines, taking off, or 
landing, and in engine and systems 
emergencies. The procedures must be 
designed so that a flight crewmember 
will not need to rely upon his memory 
for items to be checked. 

(c) The approved procedures must be 

readily usable in the cockpit of each 
aircraft and the flight crew shall follow 
them when operating the aircraft. 

§ 121.316

Fuel tanks. 

Each turbine powered transport cat-

egory airplane operated after October 
30, 1991, must meet the requirements of 
§ 25.963(e) of this chapter in effect on 
October 30, 1989. 

[Doc. No. 25614, 54 FR 40354, Sept. 29, 1989] 

§ 121.317

Passenger information re-

quirements, smoking prohibitions, 
and additional seat belt require-
ments. 

(a) Except as provided in paragraph 

(l) of this section, no person may oper-
ate an airplane unless it is equipped 
with passenger information signs that 
meet the requirements of § 25.791 of this 
chapter. Except as provided in para-
graph (l) of this section, the signs must 
be constructed so that the crew-
members can turn them on and off. 

(b) Except as provided in paragraph 

(l) of this section, the ‘‘Fasten Seat 
Belt’’ sign shall be turned on during 
any movement on the surface, for each 
takeoff, for each landing, and at any 
other time considered necessary by the 
pilot in command. 

(c) No person may operate an air-

plane on a flight on which smoking is 
prohibited by part 252 of this title un-
less either the ‘‘No Smoking’’ pas-
senger 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 seg-
ment. If both the lighted signs and the 
placards are used, the signs must re-
main lighted during the entire flight 
segment. 

(d) No person may operate a pas-

senger-carrying airplane under this 
part unless at least one legible sign or 
placard that reads ‘‘Fasten Seat Belt 
While Seated’’ is visible from each pas-
senger seat. These signs or placards 

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