(j)
If rechargeable batteries are used as the energy supply for the emergency lighting system,they maybe rechargedfromthe main electricalpower system ofthe airplane provided the charging circuitisdesigned toprecludeinadvertentbattery discharge into the charging circuit faults. If the emergency lighting system does not include a charging circuit, battery condition monitors are required.

(k)
Components of the emergency lighting system, including batteries, wiring, relays, lamps, and switches, must be capable of normal operation after being subjected to the inertia forces resulting from the ultimate load factors prescribed in Sec. 23.561(b)(2).

(l)
The emergency lighting system must be designed so that after any single transverse vertical separation of the fuselage during a crash landing :

(1)
Atleast75percent of all electrically illuminated emergency lights requiredby this section remain operative; and

(2)
Each electricallyilluminated exitsignrequiredbySec.23.811(b) and(c) re-mains operative,exceptthosethat aredirectly damagedby thefuselagesepa-ration.]

Amdt. 23-46, E.. 06/16/94
FAR 23.813 : Emergency exit access.
(a)
[For commuter categoryairplanes, access to window-type emergency exits may not be obstructed by seats or seat backs.

(b)
In addition, when certi.cationtothe emergency exitprovisionsofSec.23.807(d)(4) is requested, the following emergency exit access must be provided :

(1)
The passageway leading from the aisle to the passenger entry door must be unobstructed and at least 20 inches wide.

(2)
There must be enough space next to the passenger entry door to allow assis-tancein evacuationofpassengerswithout reducing the unobstructed width of the passageway below 20 inches.

(3)
If it is necessary to pass through a passageway between passenger compart-ments to reach a required emergency exitfrom any seatin thepassenger cabin, thepassageway mustbe unobstructed; however,curtains may be usedif they allow free entry through the passageway.

(4)
No door may be installed in any partition between passenger compartments unless that door has a means to latch it in the open position. The latching means must be able to withstand the loadsimposed upon it by the door when the door is subjected to the inertia loads resulting from the ultimate static load factors prescribed in Sec. 23.561(b)(2).

′
Elodie Roux. Septembre 2003
Subpart D : Design and Construction
(5) If it is necessary to pass through a doorway separating the passenger cabin from other areasto reach a required emergency exitfrom anypassenger seat, the door must have a means to latch it in the open position. The latching means must be able to withstand the loadsimposed upon it by the door when the door is subjected to the inertia loads resulting from the ultimate static load factors prescribed in Sec. 23.561(b)(2).]
Amdt. 23-46, E.. 06/16/94
FAR 23.815 : Width of aisle.
(a)
[Exceptasprovidedinparagraph(b) ofthis section,for commuter categoryairplanes, the width of the main passenger aisle at any point between seats must equal or exceed the values in the following table :

(b)
When certi.cation to the emergencyexitprovisions ofSec.23.807(d)(4)is requested, the mainpassenger aisle width at anypointbetween the seats must equal or exceed the following values :

Minimum main passenger aisle width 
Number of Passenger Seats  Less than 25 inches from .oor  25 inches and more from .oor 
10 through 19  9 inches  15 inches 

Minimummainpassenger aislewidth(inches)
Number of Passenger Seats Less than 25 inches from .oor 25 inches and more from .oor

11 through 19 12 20
1 : A narrower width not less than 9 inches may be approved when substantiated by tests found necessary by the Administrator.]
　
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