204 

14 CFR Ch. I (1–1–19 Edition) 

Pt. 25, SFAR No. 109 

(c) Each door between any passenger seat 

and any exit must have dual means to retain 
it in the open position, each of which is capa-
ble of reacting the inertia loads specified in 
§ 25.561. 

(d) Doors installed across a longitudinal 

aisle must translate laterally to open and 
close, e.g., pocket doors. 

(e) Each door between any passenger seat 

and any exit must be frangible in either di-
rection. 

(f) Each door between any passenger seat 

and any exit must be operable from either 
side, and if a locking mechanism is installed, 
it must be capable of being unlocked from ei-
ther side without the use of special tools. 

11. 

Width of Aisle. 

Compliance is required 

with § 25.815, except that aisle width may be 
reduced to 0 inches between passenger seats 
during in-flight operations only, provided 
that the applicant demonstrates that all 
areas of the cabin are easily accessible by a 
crew member in the event of an emergency 
(e.g., in-flight fire, decompression). Addition-
ally, instructions must be provided at each 
passenger seat for restoring the aisle width 
required by § 25.815. Procedures must be es-
tablished and documented in the AFM to en-
sure that the required aisle widths are pro-
vided during taxi, takeoff, and landing. 

12. 

Materials for Compartment Interiors. 

Compliance is required with the applicable 
provisions of § 25.853, except that compliance 
with appendix F, parts IV and V, to part 25, 
need not be demonstrated if it can be shown 
by test or a combination of test and analysis 
that the maximum time for evacuation of all 
occupants does not exceed 45 seconds under 
the conditions specified in appendix J to part 
25. 

13. 

Fire Detection. 

For airplanes with a type 

certificated passenger capacity of 20 or more, 
there must be means that meet the require-
ments of § 25.858(a) through (d) to signal the 
flightcrew in the event of a fire in any iso-
lated room not occupiable for taxi, takeoff 
and landing, which can be closed off from the 
rest of the cabin by a door. The indication 
must identify the compartment where the 
fire is located. This does not apply to lava-
tories, which continue to be governed by 
§ 25.854. 

14. 

Cooktops. 

Each cooktop must be de-

signed and installed to minimize any poten-
tial threat to the airplane, passengers, and 
crew. Compliance with this requirement 
must be found in accordance with the fol-
lowing criteria: 

(a) Means, such as conspicuous burner-on 

indicators, physical barriers, or handholds, 
must be installed to minimize the potential 
for inadvertent personnel contact with hot 
surfaces of both the cooktop and cookware. 
Conditions of turbulence must be considered. 

(b) Sufficient design means must be in-

cluded to restrain cookware while in place 
on the cooktop, as well as representative 

contents, e.g., soup, sauces, etc., from the ef-
fects of flight loads and turbulence. Re-
straints must be provided to preclude haz-
ardous movement of cookware and contents. 
These restraints must accommodate any 
cookware that is identified for use with the 
cooktop. Restraints must be designed to be 
easily utilized and effective in service. The 
cookware restraint system should also be de-
signed so that it will not be easily disabled, 
thus rendering it unusable. Placarding must 
be installed which prohibits the use of 
cookware that cannot be accommodated by 
the restraint system. 

(c) Placarding must be installed which pro-

hibits the use of cooktops (i.e., power on any 
burner) during taxi, takeoff, and landing. 

(d) Means must be provided to address the 

possibility of a fire occurring on or in the 
immediate vicinity of the cooktop. Two ac-
ceptable means of complying with this re-
quirement are as follows: 

(1) Placarding must be installed that pro-

hibits any burner from being powered when 
the cooktop is unattended. (N

OTE

: This 

would prohibit a single person from cooking 
on the cooktop and intermittently serving 
food to passengers while any burner is pow-
ered.) A fire detector must be installed in the 
vicinity of the cooktop which provides an au-
dible warning in the passenger cabin, and a 
fire extinguisher of appropriate size and ex-
tinguishing agent must be installed in the 
immediate vicinity of the cooktop. Access to 
the extinguisher may not be blocked by a 
fire on or around the cooktop. 

(2) An automatic, thermally activated fire 

suppression system must be installed to ex-
tinguish a fire at the cooktop and imme-
diately adjacent surfaces. The agent used in 
the system must be an approved total flood-
ing agent suitable for use in an occupied 
area. The fire suppression system must have 
a manual override. The automatic activation 
of the fire suppression system must also 
automatically shut off power to the cooktop. 

(e) The surfaces of the galley surrounding 

the cooktop which would be exposed to a fire 
on the cooktop surface or in cookware on the 
cooktop must be constructed of materials 
that comply with the flammability require-
ments of part III of appendix F to part 25. 
This requirement is in addition to the flam-
mability requirements typically required of 
the materials in these galley surfaces. Dur-
ing the selection of these materials, consid-
eration must also be given to ensure that the 
flammability characteristics of the mate-
rials will not be adversely affected by the use 
of cleaning agents and utensils used to re-
move cooking stains. 

(f) The cooktop must be ventilated with a 

system independent of the airplane cabin and 
cargo ventilation system. Procedures and 
time intervals must be established to inspect 
and clean or replace the ventilation system 

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