Page 1-20
Pilot’s Operating Manual
Section V Sub-section 1
NORMAL HANDLING
P/N 140-590032-0007
Revision A4: Sep, 2010
DURATION OF OXYGEN SUPPLY FOR COMPLIANCE WITH 14 CFR 135.157
This table provides the oxygen duration times for an emergency descent and continued cruise at 15,000
feet.
Oxygen supply to the passengers is reduced to 10% ten minutes after oxygen initiation.
After the given period, the airplane is required to descend to 10,000 feet. The oxygen supply is
completely stopped to the passengers at this altitude.
For times quoted less than 120 minutes this procedure allows 120 minutes minimum supplementary
oxygen supply to the 2 crew members as stipulated in 14 CFR 135.137 requirements with total usable
oxygen contents depleted.
Table 5 - Duration of Oxygen Supply - 14 CFR 135.157
Number of
Passengers
Duration Time In Minutes
2 Bottles
3 Bottles
0
177
270
1
37
122
2
30
118
3
25
112
4
18
105
5
12
100
6
-
93
7
-
86
8
-
80
9
-
74
10
-
68
11
-
42
12
-
38
13
-
34
14
-
30
15
-
26
