SUPPLEMENTARY
PROCEDURES
ENVIRONMENTAL
AIRPLANE
O
PERATIONS
MANUAL
1-02-79
Page
32
Code
01
REVISION 41
Copyright © by Embraer. Refer to cover page for details.
CRUISE
Once cruise level is established, or a step in the climb is desired:
QRH Table ....................................................................CHECK
Manual Controller..........................................................NULL RATE
Allow the cabin to climb (or descend) to the value specified on the
QRH table, then set null rate. Cabin altitude and ∆P must be
consistent with the table. Keeping the manual controller close to the
12 o’clock position to keep a null rate is a good position for the rest
of the cruise. However, minor adjustments might be required.
DESCENT
Just after initiating descent:
Manual Controller..........................................................SLOWLY
TURN
COUNTER
CLOCKWISE
Initially, set -400 ft/min rate, which corresponds to a position
between 12 and 11 o’clock in the manual controller.
During descent:
Set a cabin rate that will meet the required landing altitude upon
landing. Allow the cabin to descend slowly towards the desired landing
altitude so that upon landing ∆P reads zero.
During holding at any flight altitude:
Manual Controller..........................................................SET AROUND
12 O’CLOCK
POSITION
Keep the manual controller close to the 12 o’clock position to keep a
null rate. However, minor adjustments might be required.
TAXI-IN
On the ground:
Differential Pressure .....................................................ZERO
Once ∆P reads zero:
Manual Controller..........................................................FULL UP
In this position, the outflow valve will be kept fully open, which will
equalize outside and inside cabin pressure. After that, cockpit side
windows and airplane doors can be opened.
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