T-45C TS, ADV & IUT ENG-09
Hydraulic System
PROGRESS CHECK
Question 2 — 1.4.8.2.1, 1.4.8.3
What information do the HYD 1, HYD 2, and BRAKE
pressure gauges provide and what should they display
when the hydraulic system is functioning normally?
ANSWER:
1. HYD 1 indicates HYD 1 system pressure as provided by
the HYD 1 EDP. If HYD 1 is functioning normally, it should
indicate 3000 psi.
2. HYD 2 indicates HYD 2 system pressure as provided by
the HYD 2 EDP or the Emergency Hydraulic System. If
HYD 2 EDP is functioning normally, it should indicate
3000 psi. If the emergency hydraulic system is functioning
normally, it should fluctuate between 2500 and 3000 psi.
3. BRAKE indicates the nitrogen preload pressure in the
wheel brake/emergency flap accumulator. If the
accumulator is functioning normally, it should indicate 3000
psi when HYD 1 is operating and approximately 2800 psi
when the engine is shut down.
Sg 11, fr 2
Lesson Organization
V.
Aircraft interfaces 1.4.8.2
HYDRAULIC SYSTEM
* T-45C hydraulic system
A.
Inputs
overview
* Hydraulic system no. 1 (HYD 1)
1.
Electrical system: all Warnig and caution advisory
* Hydraulic system no. 2 (HYD 2)
panels lights, HYD 2 RESET button, and system
* Emergency hydraulic system
solenoid valves supplied by 28 VDC essential
* Aircraft interfaces
services bus
Sg 11, fr 3, p 1
2.
Engine accessory gearbox: provides mechanical
Simplified Hydraulic
power to drive two hydraulic pumps
System Block Diagram
(2 overlays)
B.
Output
1.
HYD 1
a.
Flight controls supplied continuously
(1) Ailerons
Page 9-33
(9-98) Original
Previous Page
