369 

Federal Aviation Administration, DOT 

Pt. 25, SFAR No. 109 

These signs may be internally electrically il-
luminated, or self illuminated by other than 
electrical means, with an initial brightness 
of at least 160 microlamberts. The color may 
be reversed in the case of a sign that is self- 
illuminated by other than electrical means. 

(b) 

Floor Proximity Escape Path Marking. In 

lieu of the requirements of § 25.812(e)(1), for 
cabin seating compartments that do not 
have the main cabin aisle entering and 
exiting the compartment, the following are 
applicable: 

(1) After a passenger leaves any passenger 

seat in the compartment, he/she must be 
able to exit the compartment to the main 
cabin aisle using only markings and visual 
features not more that 4 feet above the cabin 
floor, and 

(2) Proceed to the exits using the marking 

system necessary to accomplish the actions 
in § 25.812(e)(1) and (e)(2). 

(c) 

Transverse Separation of the Fuselage. In 

the event of a transverse separation of the 
fuselage, compliance must be shown with 
§ 25.812(l) except as follows: 

(1) For each airplane type originally type 

certificated with a maximum passenger seat-
ing capacity of 9 or less, not more than 50 
percent of all electrically illuminated emer-
gency lights required by § 25.812 may be ren-
dered inoperative in addition to the lights 
that are directly damaged by the separation. 

(2) For each airplane type originally type 

certificated with a maximum passenger seat-
ing capacity of 10 to 19, not more than 33 per-
cent of all electrically illuminated emer-
gency lights required by § 25.812 may be ren-
dered inoperative in addition to the lights 
that are directly damaged by the separation. 

10. 

Interior doors. In lieu of the require-

ments of § 25.813(e), interior doors may be in-
stalled between passenger seats and exits, 
provided the following requirements are met. 

(a) Each door between any passenger seat, 

occupiable for taxi, takeoff, and landing, and 
any emergency exit must have a means to 
signal to the flightcrew, at the flightdeck, 
that the door is in the open position for taxi, 
takeoff and landing. 

(b) Appropriate procedures/limitations 

must be established to ensure that any such 
door is in the open configuration for takeoff 
and landing. 

(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. 

VerDate Mar<15>2010 

10:12 Mar 18, 2014

Jkt 232046

PO 00000

Frm 00379

Fmt 8010

Sfmt 8002

Y:\SGML\232046.XXX

232046

pmangrum on DSK3VPTVN1PROD with CFR