14 C.F.R. § 25.957 Flow between interconnected tanks.
Title 14 - Aeronautics and Space
If fuel can be pumped from one tank to another in flight, the fuel tank vents and the fuel transfer system must be designed so that no structural damage to the tanks can occur because of overfilling.
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart E—Powerplant
Fuel System
§ 25.957 Flow between interconnected tanks.
