Document ID: chunk:federal_register_of_legislation:F2017C01038:body:0:p7
Version: federal_register_of_legislation:F2017C01038
Segment Type: other
Provision Reference: 
Character Range: 15361–17969

IV exits
       There must be access from the main aisle to each Type III or Type IV emergency exit and this access must not be obstructed by seats, berths, or other protrusions in a manner that would reduce the effectiveness of the exit.

16 Filed before 1 January 1958 — Type III and Type IV exits
       16.1 For an aeroplane whose type certificate application was filed before 1 January 1958, access to each Type III or Type IV emergency exit must be such that:
(a) the projected opening of the exit is not obstructed; and
(b) in opening the exit there is no interference from seats, berths or other protrusions, including seat backs in any position, for a distance from the exit of not less than the width of the narrowest passenger seat installed on the aeroplane.
       16.2 A seat back does not infringe the requirement in subsection 16.1 if:
(a) the seat back recline mechanism had a manual lock-upright capability; and
(b) procedures are in place on the aeroplane to ensure that the seat back is locked in the upright position during take-off and landing.

17 Filed after 1 January 1958 – 60 or more seats – Type III exit
       17.1 For an aeroplane with a passenger seating configuration of 60 or more, and a type certificate application filed after 1 January 1958, access to each Type III emergency exit must be:
(a) if the adjacent seat rows on the exit side of the aisle contain no more than 2 seats — subject to subsection 17.3, an unobstructed passageway that is at least 254 mm wide; or
(b) if the adjacent seat rows on the exit side of the aisle contain 3 seats — subject to subsection 17.3, an unobstructed passageway that is at least 330 mm.
       17.2For subsection 17.1, the width of a passageway must be measured with adjacent seats adjusted to their most adverse position.
       17.3 Instead of the unobstructed passageway mentioned in paragraph 17.1 (a) or (b), there may be 2 unobstructed passageways each at least 152 mm wide between seat rows leading to an unobstructed space adjacent to each emergency exit, provided adjacent exits do not share a common passageway.
       17.4 For subsection 17.3:
(a) the width of the passageway must be measured with adjacent seats adjusted to their most adverse position; and
(b) the unobstructed space adjacent to the emergency exit must:
 (i) extend vertically from the floor to either the ceiling or the bottom of the sidewall stowage bins; and
 (ii) extend inboard from the emergency exit for a distance not less than the width of the narrowest passenger seat installed on the aeroplane; and
 (iii) extend from the forward edge of the