StacksVerified U.S. regulatory reference

14 CFR §121.229

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Fuel tanks must be located in accordance with § 121.255.
  2. (b)No part of the engine nacelle skin that lies immediately behind a major air outlet from the engine compartment may be used as the wall of an integral tank.
  3. (c)Fuel tanks must be isolated from personnel compartments by means of fume- and fuel-proof enclosures.