EASA CS 25 Passageway, Signage & Crew Assist Space Considerations

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Sofema Online (SOL)  www.sassofia.com reviews key aspects of Cabin Certification Requirements.

Introduction - Reference the following requirement:

» Aisle widths must meet requirements set forth in CS 25.815

» Emergency exits must be accessible per CS 25.813

» Emergency exits must be marked in accordance with CS 25.811

» Passageway to all type i and type iii exits must not be less than 20"

» Crew oxygen masks must meet all requirements in CS 25.1439

» Storage provisions for all emergency equipment must be marked to identify their contents iaw CS 25.1561

» Pax Signage -  "fasten seat belt" and "no smoking" signs must be visible to each person seated in the passenger

» All seat backs and bulkheads must have "fasten seat belt while seated"

Concerning Aisle Widths

CS 25.815 Width of the aisle (See AMC 25.815) The passenger aisle width at any point between seats must equal or exceed the values in the following table:

Passenger seating capacity Minimum passenger aisle width (cm(inches))
Less than 64 cm (25 inches) from floor 64 cm (25 inches) and more from floor

10 or less

11 to 19

20 or more

30 (12)*

30 (12)

38 (15)

38 (15)

51 (20)

51 (20)

* A narrower width not less than 23 cm (9 inches) may be approved when substantiated by tests found necessary by the Agency.

AMC 25.815 Width of the aisle - The relevant parts of the FAA Advisory Circular (AC) 25-17A Change 1, Transport Airplane Cabin Interiors Crashworthiness Handbook, dated 24.5.2016, are accepted by the Agency as providing.

CS 25.811 Emergency Exit Marking

» Each passenger emergency exit, its means of access, and its means of the opening must be conspicuously marked.

o The identity and location of each passenger emergency exit must be recognizable from a distance equal to the width of the cabin.

o Means must be provided to assist the occupants in locating the exits in conditions of dense smoke.

o The location of each passenger emergency exit must be indicated by a sign visible to occupants approaching along the main passenger aisle (or aisles).

o A passenger emergency exit locator sign above the aisle (or aisles) near each passenger emergency exit, or at another overhead location if it is more practical because of low headroom, except that one sign may serve more than one exit if each exit can be seen readily from the sign;

» A passenger emergency exit marking sign next to each passenger emergency exit, except that one sign, may serve two such exits if they both can be seen readily from the sign; and

» A sign on each bulkhead or divider that prevents fore and aft vision along the passenger cabin to indicate emergency exits beyond and obscured by the bulkhead or divider, except that if this is not possible the sign may be placed at another appropriate location.

» The location of the operating handle and instructions for opening exits from the inside of the aeroplane must be shown in the following manner:

» Each passenger emergency exit must have, on or near the exit, a marking that is readable from a distance of 76 cm (30 inches).

» Each passenger emergency exit operating handle and the cover removal instructions, if the operating handle is covered, must –

o Be self-illuminated with an initial brightness of at least 0.51 candela/m2 (160 microlamberts), or

o Be conspicuously located and well illuminated by the emergency lighting even in conditions of occupant crowding at the exit.

» All Type II and larger passenger emergency exits with a locking mechanism released by the motion of a handle, must be marked. The word OPEN must be horizontally situated adjacent to the arrowhead and must be in red capital letters at least 25 mm (1 inch) high.

» Each emergency exit that is required to be openable from the outside, and its means of opening, must be marked on the outside of the aeroplane.

o The outside marking for each passenger emergency exit on the side of the fuselage must include a 51 mm (2-inch) coloured band outlining the exit.

Crew Assist Space

» Each assist space must be a rectangle on the floor, of sufficient size to enable a crew member, standing erect, to effectively assist evacuees. The assist space must not reduce the unobstructed width of the passageway below that required for the exit.

» For each Type A or Type B exit, assist space must be provided at each side of the exit regardless of whether an assisting means is required by CS 25.810(a).

» For each Type C, I, or II exit installed in an aeroplane with seating for more than 80 passengers, an assist space must be provided at one side of the passageway regardless of whether an assisting means is required by CS 25.810(a).

» For each Type C, I, or II exit, an assist space must be provided at one side of the passageway if an assisting means is required by CS 25.810(a).

» For any tail cone exit that qualifies for 25 additional passenger seats under the provisions of CS 25.807(g)(9)(ii), an assist space must be provided, if an assisting means is required by CS 25.810(a).

» There must be a handle, or handles, at each assist space, located to enable the crew member to steady himself or herself.

Next Steps

Sofema Aviation Services (SAS) Provides Consultancy, Classroom, Webinar and Online Training including the following 5-day course. For additional details, please visit www.sassofia.com or email team@sassofia.com

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