Oil tank tests.
CFR · 2024-01-01 · US · Title 14
Each oil tank must be designed and installed so that it can withstand, without leakage, an internal pressure of 5 p.s.i., except that each pressurized oil tank used with a turbine engine must be designed and installed so that it can withstand, without leakage, an internal pressure of 5 p.s.i., plus the maximum operating pressure of the tank.
official document · source cfr-2024 · id 14:§ 27.1015