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 Less than 25 in. and
25 in. more from
from floor floor------------------------------------------------------------------------10 or less...................................... \1\ 12 1511 through 19................................... 12 2020 or more...................................... 15 20------------------------------------------------------------------------\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]