Utility Helicopter 60 Black Hawk (UH-60S) Academics Exam 2 Practice

The test is about quickly isolating a hydraulic leak by targeting the affected stage. In the UH-60, the SERVO OFF switch is used to shut off hydraulic flow to a specific servo stage. Setting it to the 1st stage removes hydraulic pressure from the first-stage primary servos, effectively isolating that stage from the rest of the system. This contains the leak, reduces fluid loss, and prevents contamination from spreading, while preserving the other hydraulic circuits for continued control. Other actions aren’t appropriate for this situation: turning off the master battery cuts power to the entire helicopter, pulling a tail rotor circuit breaker doesn’t isolate the first-stage servos, and closing a bleed valve isn’t a reliable way to stop a leak or isolate the affected circuit.