T-45A UJPT, E2-C2, ADV, & IUT Eng-17
ECS/Pressurization System & OBOGS
PROGRESS CHECK
Question 1 -- 1.4.15.3.1
Of what three subsystems does the ECS system
consist?
ANSWERS:
1. Air conditioning
2. Pressurization
3. Avionics equipment cooling
Question 2 -- 1.4.15.3
What is indicated by the illumination of the CABIN
ALT warning light?
ANSWER: Cockpit pressurization or air conditioning
failure. Light illuminates when cabin pressure
altimeter exceeds 24,500 +/- 500 ft MSL indication,
overpressure to CAU compressor, CAU outlet
temperature above 500 degrees F, or CAU turbine
inlet temperature above 250 degrees F.
IV. ECS aircraft interfaces 1.4.15.2
Sg 4, fr 1
Lesson Organization
A.
Electrical inputs
1.
28 VDC essential services bus
a.
Cockpit air conditioning control
b.
Cabin pressure control number 1
c.
Cabin temperature
d.
Cabin pressure warning
2.
28 VDC generator bus: cabin pressure
control number 2
(8-03) Original
Page 17-11
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