14 C.F.R. § 25.815 Width of aisle.
Title 14 - Aeronautics and Space
The passenger aisle width at any point between seats must equal or exceed the values in the following table: [Amdt. 25–15, 32 FR 13265, Sept. 20, 1967, as amended by Amdt. 25–38, 41 FR 55466, Dec. 20, 1976]
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart D—Design and Construction
Emergency Provisions
§ 25.815 Width of aisle.
------------------------------------------------------------------------ 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.
