detank

Verb

 * 1)  To empty (some substance) from a tank.
 * 2) * 1974, NASA technical note (part 7612, page 53)
 * During the test, the conformal skin heaters were operated and exercised to simulate various thermal conditions; the cabin was pressurized and depressurized; simulated propellant was detanked;
 * 1)  To empty (a vehicle or equipment, or its tanks).