T-45C TS, ADV & IUT ENG-17
OBOGS & ECS/Pressurization System
(4) Internal plenum receives oxygen-rich
breathing air from both sieve beds and
directs air to oxygen plenum
c.
Directs oxygen-rich breathing air to plenum
Overlay 8
5.
Plenum
Plenum
a.
Receives oxygen from concentrator
b.
Provides a volume of oxygen-enriched
breathing air to meet peak demands
c.
Prevents surges in pilots'oxygen supply
d.
Equalizes temperature of breathing air from
concentrator to cockpit
e.
Passes oxygen to oxygen/communications
hose quick-disconnects
Overlay 9
6.
Oxygen monitor
Oxygen Monitor
a.
Provides BIT using cockpit air
b.
Continuously analyzes oxygen-enriched
breathing air
c.
Senses low oxygen concentrations
(1) Activates MASTER ALERT
(2) Sounds warning tone
(3) Illuminates OXYGEN warning light on
warning panel
d.
Provides rapid warmup (via built-in circuit
heater) during low outside temperature
7.
Ejection seat: manifold provides common duct for
OBOGS and emergency oxygen system
Original (9-98)
Page 17-6
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