14 CFR §25.1015

1. (a)It can withstand, without failure, each vibration, inertia, and fluid load that it may be subjected to in operation; and
2. (b)It meets the provisions of § 25.965, except—
   1. (1)The test pressure—
      1. (i)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
      2. (ii)For all other tanks may not be less than 5 p.s.i. instead of the pressure specified in § 25.965(a); and
   2. (2)The test fluid must be oil at 250 °F. instead of the fluid specified in § 25.965(c).