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Title 14: Aeronautics and Space
CHAPTER I: FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
SUBCHAPTER C: AIRCRAFT
PART 25: AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart E: Powerplant
: Fuel System
25.969 - Fuel tank expansion space.
Each fuel tank must have an expansion space of not less than 2 percent of the tank capacity. It must be impossible to fill the expansion space inadvertently with the airplane in the normal ground attitude. For pressure fueling systems, compliance with this section may be shown with the means provided to comply with ? 25.979(b).
[Amdt. 25-11, 32 FR 6913, May 5, 1967]
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