M
V
A
ANUAL
ENTING OF THE
IRCRAFT
The order the manual let-down valves are opened is:
Figure 3-27: Manual let-down ADTS542F and ADTS552F
Number of
Channels
2
Figure 3-28: Manual let-down ADTS553
Number of
Channels
3
[EN] English
P
S
S
ITOT AND
TATIC
YSTEMS
Application
1st Valve open
Pitot & Static
Pt to Ps (A)
Application
1st Valve open
Smart Probe
Ps2 to Ps1 (A)
Angle of Attack
2nd Valve open
3rd Valve open
Ps to Atm (B)
N/A
2nd Valve open
3rd Valve open
Pt1 to Ps1 (B)
Ps1 to Atm (C)
77
4th Valve open
N/A
4th Valve open
N/A
K0553 Revision D