Federal Aviation Administration, DOT

Section 25.819

relative to the surrounding structure,
listed in Section 25.561(b).
[Amdt. 25-1, 30 FR 3204, Mar. 9, 1965, as
amended by Amdt. 25-15, 32 FR 13265, Sept.
20, 1967; Amdt. 25-32, 37 FR 3971, Feb. 24, 1972;
Amdt. 25-46, 43 FR 50597, Oct. 30, 1978; Amdt.
25-72, 55 FR 29783, July 20, 1990; Amdt. 25-76,
57 FR 19244, May 4, 1992; Amdt. 25-76, 57 FR
29120, June 30, 1992; Amdt. 25-88, 61 FR 57958,
Nov. 8, 1996; Amdt. 25-116, 69 FR 62788, Oct.
27, 2004; Amdt. 25-128, 74 FR 25645, May 29,
2009]

Section 25.815 Width of aisle.
The passenger aisle width at any
point between seats must equal or exceed the values in the following table:
Minimum passenger
aisle width (inches)
Passenger seating capacity

10 or less .......................................
11 through 19 ................................
20 or more .....................................

Less than
25 in. from
floor

25 in. and
more from
floor

1 12

15
20
20

12
15

1 A narrower width not less than 9 inches may be approved
when substantiated by tests found necessary by the
Administrator.

[Amdt. 25-15, 32 FR 13265, Sept. 20, 1967, as
amended by Amdt. 25-38, 41 FR 55466, Dec. 20,
1976]

Section 25.817 Maximum number of seats
abreast.
On airplanes having only one passenger aisle, no more than three seats
abreast may be placed on each side of
the aisle in any one row.

spaschal on DSK3GDR082PROD with CFR

[Amdt. 25-15, 32 FR 13265, Sept. 20, 1967]

Section 25.819 Lower deck service compartments (including galleys).
For airplanes with a service compartment located below the main deck,
which may be occupied during taxi or
flight but not during takeoff or landing, the following apply:
(a) There must be at least two emergency evacuation routes, one at each
end of each lower deck service compartment or two having sufficient separation within each compartment,
which could be used by each occupant
of the lower deck service compartment
to rapidly evacuate to the main deck
under normal and emergency lighting
conditions. The routes must provide for
the evacuation of incapacitated persons, with assistance. The use of the

evacuation routes may not be dependent on any powered device. The routes
must be designed to minimize the possibility of blockage which might result
from fire, mechanical or structural
failure, or persons standing on top of or
against the escape routes. In the event
the airplane-s main power system or
compartment main lighting system
should fail, emergency illumination for
each lower deck service compartment
must be automatically provided.
(b) There must be a means for twoway voice communication between the
flight deck and each lower deck service
compartment, which remains available
following loss of normal electrical
power generating system.
(c) There must be an aural emergency alarm system, audible during
normal and emergency conditions, to
enable crewmembers on the flight deck
and at each required floor level emergency exit to alert occupants of each
lower deck service compartment of an
emergency situation.
(d) There must be a means, readily
detectable by occupants of each lower
deck service compartment, that indicates when seat belts should be fastened.
(e) If a public address system is installed in the airplane, speakers must
be provided in each lower deck service
compartment.
(f) For each occupant permitted in a
lower deck service compartment, there
must be a forward or aft facing seat
which meets the requirements of
Section 25.785(d), and must be able to withstand maximum flight loads when occupied.
(g) For each powered lift system installed between a lower deck service
compartment and the main deck for
the carriage of persons or equipment,
or both, the system must meet the following requirements:
(1) Each lift control switch outside
the lift, except emergency stop buttons, must be designed to prevent the
activation of the life if the lift door, or
the hatch required by paragraph (g)(3)
of this section, or both are open.
(2) An emergency stop button, that
when activated will immediately stop
the lift, must be installed within the
lift and at each entrance to the lift.

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