EMERGENCY EQUIPMENT
Oxygen
Aircraft Operations Manual
6/2.1
PAGE
7
Apr 01/15
4.
PORTABLE OXYGEN
The aircraft is provided with portable oxygen
bottles. There are two sizes: large (310 L) and small
(120 L). Number and locations vary with national
regulations.
Description
The large (310 L) bottle
is intended for crew walk
−
around and is the F/A primary choice of oxygen
supply.
It has two 2 L/min. outlets (with option 231
−
1
installed, only one outlet), suitable for both flight
crew and the full
−
face mask.
Some bottles may also be fitted with outlets which
can be used with the passenger masks.
Minimum duration with 1,800 psi initial pressure:
−
One outlet in use
80 min.
. . . . .
−
Two outlets in use
50 min.
. . . .
With the full face smoke mask in use, duration is
reduced to 10
−
20 min., depending on inhalation
rate.
The small (120 L) bottle
is intended for giving first
aid and supplemental oxygen. It has its own oxygen
mask. This bottle has two constant flow outlets (2
and 4 L/min). The 4 L/min (HI) outlet is used for first
aid, and the 2 L/min (LO) outlet for supplemental
oxygen, e.g. after a decompression.
Minimum duration with 1,800 psi initial pressure:
−
HI
20 min.
. . . . . . .
−
LO
30 min.
. . . . . .
Minimum pressure for all portable bottles before
take
−
off is 1,500 psi,
The oxygen mask attached to the small (120 L)
bottle can not be connected to any other outlet in
the aircraft.
NOTE
A11173
Fig. 7 Portable oxygen bottles