Sec. 27.969 — Fuel tank expansion space.
Each fuel tank or each group of fuel tanks with interconnected vent systems must have an expansion space of not less than 2 percent of the tank capacity. It must be impossible to fill the fuel tank expansion space inadvertently with the rotorcraft in the normal ground attitude.
[Amdt. 27–23, 53 FR 34213, Sept. 2, 1988]
NEXT: Sec. 27.971 - Fuel tank sump.
PREVIOUS: Sec. 27.967 - Fuel tank installation.