Pilot's Operating Handbook
Section 4
Normal procedures
EASA Approved
Edition 0 - March 05, 2019
Rev. 0
Page 4.4.36
In-flight available oxygen quantity
1 - Oxygen pressure Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 - Outside air temperature (OAT) Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 - Determine the usable oxygen percent using the chart figure 4.4.2
Figure 4.4.2 - Usable oxygen
4 - Determine the oxygen duration in minutes by multiplying the values read on
table figure 4.4.3 by the percent obtained with the chart figure 4.4.2
Number of passengers
Duration :
Passengers, plus 1 pilot
Duration :
Passengers, plus 2
pilots
0 226 113
1 162 94
2 127 81
3 104 71
4 88 65
Figure 4.4.3 - Oxygen duration
End of procedure.