T-45A UJPT, E2-C2, ADV, & IUT Eng-17
ECS/Pressurization System & OBOGS
B.
Evaluation criteria: electrical BIT solid-state
Sg 8, fr 2
oxygen monitor (SSOM) BUNO 165057 and up
(1 Overlay)
and BUNO 163600 through 165658 after
AFC-098
1.
OBOGS electronic BIT button is located on
the front side of the solid-state oxygen
monitor. Pressing this button initiates the
IBIT of the oxygen monitor's electronic
components.
SOLID STATE OXYGEN MONITOR
2.
Power-up and periodic BIT: no indication of
BIT in progress--OXYGEN warning light
Overlay 1
illuminated if fault is detected
Electronic BIT Button
NOTE: Brief appearance of the OXYGEN warning
light during OBOGS warmup is normal.
IX. OBOGS aircraft interfaces 1.4.16.2
Sg 9, fr 1
A.
Electrical
Lesson Organization
1.
28 VDC essential services bus provides
power
a.
OBOGS concentrator/monitor
b.
Bleed valve control
2.
28 VDC generator bus provides power to
the OBOGS heater
B.
Engine
1.
Fifth-stage bleed air
a.
OBOGS
b.
Anti-g
C.
Centralized warning system (CWS) outputs:
OXYGEN Warning light
(8-03) Original
Page 17-22
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