T-45C TS, ADV & IUT ENG-17
OBOGS & ECS/Pressurization System
2.
CABIN ALT warning light: indicates cockpit
Sg 6, fr 7
pressurization failure. Illuminates when cabin
CABIN ALT Warning
Light
pressure altimeter exceeds 24,500 +/- 500 feet
indication
3.
Cabin pressure altimeter: Indicates cockpit pressure
altitude
C.
Avionics equipment cooling system: AV HOT caution
light illuminates when air temperature in avionics cooling
air duct exceeds 67 degrees C (153 degrees F). Light
Sg 6, fr 8
illuminates only when the aircraft is on the ground
Cabin Pressure
Altimeter
NOTE: In the event of an AV HOT caution light, opening
the canopy will redirect ECS air from defog to the
avionics.
PROGRESS CHECK
Sg 6, fr 9
Question 5 -- 1.4.15.3.1
AV HOT Caution Light
Of what three subsystems does the ECS system consist?
ANSWERS:
1. Air conditioning
2. Pressurization
3. Avionics equipment cooling
Question 6 -- 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 indication, overpressure to CAU compressor, CAU
outlet temperature above 500 degrees F, or CAU turbine inlet
temperature above 250 degrees F.
Original (9-98)
Page 17-20
Previous Page
