14 CFR § 25.1015

It can withstand, without failure, each vibration, inertia, and fluid load that it may be subjected to in operation; and

It meets the provisions of § 25.965, except—

The test pressure—

For pressurized tanks used with a turbine engine, may not be less than 5 p.s.i. plus the maximum operating pressure of the tank instead of the pressure specified in § 25.965(a); and

For all other tanks may not be less than 5 p.s.i. instead of the pressure specified in § 25.965(a); and

The test fluid must be oil at 250 °F. instead of the fluid specified in § 25.965(c).