Airplane Flight Manual
Page 20
Sub-section - 4.10
NORMAL PROCEDURES
FAA Approved
Revision A3:
Apr 26, 2007
TAKEOFF and LANDING at AIRFIELDS ABOVE 9000 ft FIELD PRESSURE
ALTITUDE
(continued)
When Established In The Climb
CABIN CONTROLLER .....................................Set the ACFT ALT to cruise altitude
+ 2000 ft.
RATE knob........................................................Set desired rate of descent not to
exceed 300 ft/minute.
Once The Cabin Pressure Altitude Drops Below 8500 ft
CABIN HI-DATUM.............................................De-select
NOTE: CABIN HI DATUM must be de-selected by the time the airplane has reached
an altitude of 25,000 ft.
DESCENT CHECKS
Start Of Descent
CABIN PRESSURE CONTROL .......................Set to 10,000 ft
CABIN HI-DATUM.............................................Select
RATE knob........................................................Adjust to give the desired rate of climb
BEFORE LANDING CHECKS
Apply the correction given in the following table for the appropriate QNH to the field pressure
altitude, then set that value on the CABIN ALT scale of the pressure controller.
NOTE: If the corrected field pressure altitude is greater then 10,000 ft, set the cabin
pressure controller to 10,000 ft.
Pressurization ............................................................. Set
QNH - mb
960
965
970
975
980
985
990
QNH - in Hg
28.36
28.51
28.64
28.79
28.94
29.09
29.23
Correction in ft
+1750
+1650
+1500
+1350
+1250
+1100
+950
QNH - mb
995
1000
1005
1010
1015
1020
1025
QNH - in Hg
29.38
29.53
29.68
29.82
29.97
30.12
30.27
Correction in ft
+800
+650
+550
+400
+250
+150
0
QNH - mb
1030
1035
1040
1045
1050
QNH - in Hg
30.41
30.56
30.92
31.07
31.22
Correction in ft
-150
-300
-450
-550
-700
Continued Next Page
For Training Purposes Only