Systems Guide

A318/A319/A320/A321
Professional
SYSTEMS
Systems guide
Vol
4
04-03-18
11 July 2018
• CLB mode is automatically selected when
o ACC ALT is reached
o ALT CSTR is reached with CLB mode armed
• CLB mode can be manually selected by pushing the ALT selector knob.
DISENGAGEMENT CONDITIONS
• NAV mode lost or disengaged
• Selecting another vertical mode
• Setting a lower altitude in FCU than current altitude
GUIDANCE
In standard CLB mode the engine stays at max climb thrust, the speed will be the one calculated by the
FMGS and pitch will vary to keep that speed.
OPEN CLIMB
ENGAGEMENT CONDITIONS
• The aircraft must be in flight more than 5 seconds
• LAND mode is not engaged
• FCU selected altitude is higher than current altitude
OPEN CLIMB is engaged by:
• Pulling the ALT selector knob
• Acceleration altitude reached with armed CLM mode and NAV not engaged
• When an overspeed condition is detected (the aircraft will pitch up to lose speed)
DISENGAGEMENT CONDITIONS
• Selecting any other vertical mode
• Selecting a lower altitude then the current altitude
GUIDANCE
In OPEN CLB the target Speed / Mach is kept by varying the pitch, thrust is managed by the A / THR or
manually, speed target can be selected or managed. All ALT CSTR are ignored in OPEN CLB.