T-45C TS, ADV & IUT ENG-10
Hydraulic System Malfunctions
Your flight control surfaces are hydraulically operated--with no mechanical
backup. Any hydraulic system failure is serious. In the worst case--if you lose
all hydraulic power--the airplane is unflyable.
These malfunctions may not occur in isolation; one might well cause another.
These CAI lessons teach you only the indications of each malfunction and their
associated safety implications. Emergency procedures are taught later in the
This lesson is intended to familiarize you with the indications of malfunctions
that could occur in the T-45C hydraulic system. In addition, you will learn how
to verify the indications (if necessary) and what each malfunction means in
terms of aircraft operation and flight safety.
Specific procedures for emergencies are not discussed directly in this lesson,
although some may be obvious. Later in your training, you will learn exactly
what to do in response to these malfunctions. In the simulator, you will be
expected to recognize the indications you learn today and to take the correct
This lesson presents indications of the following hydraulic system malfunctions:
Uncommanded ram air turbine (RAT) extension
Flight control accumulator failure
HYD 1 and HYD 2 slow pressure loss
HYD 1 and HYD 2 hydraulic pump failure
HYD 1 and HYD 2 failure (RAT operating)
Total system failure
Recall the location and function of cockpit hydraulic indicators and switches,
warning and caution advisory panel and master alert light.
Recall the warning and caution advisory lights associated with the hydraulic