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The crew should be aware that an ATC "DIR TO" clearance automatically removes the requirement to comply with the speed/altitude constraints assigned to the waypoints deleted from the F-PLN. However, if intermediate waypoints are relevant, e.g. for terrain awareness, then "DIR TO" with ABEAMS may be an appropriate selection as constraints can be re-entered into these waypoints if required.
Following the selection of HDG, DES mode will switch automatically to V/S, and altitude constraints will no longer be taken into account.
 

  NORMAL OPERATIONS
DESCENT
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

10 000 FT FLOW PATTERN
Applicable to: ALL
10 000 ft FLOW PATTERN
 
 

  NORMAL OPERATIONS
DESCENT
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

Intentionally left blank
 

  NORMAL OPERATIONS
HOLDING
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

PREFACE
Applicable to: ALL
Whenever holding is anticipated, it is preferable to maintain cruise level and reduce speed to green dot, with ATC clearance, to minimize the holding requirement. As a rule of thumb, a M 0.05 decrease during 1 h equates to 4 min hold. However, other operational constraints might make this option inappropriate.
A holding pattern can be inserted at any point in the flight plan or may be included as part of the STAR. In either case, the holding pattern can be modified by the crew.
HOLDING SPEED AND CONFIGURATION
Applicable to: ALL
If a hold is to be flown, provided NAV mode is engaged and the speed is managed, an automatic speed reduction will occur to achieve the Maximum Endurance speed when entering the holding pattern. The Maximum Endurance speed is approximately equal to Green Dot and provides the lowest hourly fuel consumption.
If the Maximum Endurance speed is greater than the ICAO or state maximum holding speed, the crew should select flap 1 below 20 000 ft and fly S speed. Fuel consumption will be increased when holding in anything other than clean configuration and Maximum Endurance speed.
IN THE HOLDING PATTERN
Applicable to: ALL
The holding pattern is not included in the descent path computation since the FMGS does not know how many patterns will be flown. When the holding fix is sequenced, the FMGS assumes that only one holding pattern will be flown and updates predictions accordingly. Once in the holding pattern, the VDEV indicates the vertical deviation between current aircraft altitude and the altitude at which the aircraft should cross the exit fix in order to be on the descent profile.
The DES mode guides the aircraft down at -1 000 ft/min whilst in the holding pattern until reaching the cleared altitude or altitude constraint.
When in the holding pattern, LAST EXIT UTC/FUEL information is displayed on the MCDU HOLD page. These predictions are based upon the fuel policy requirements specified on the MCDU FUEL PRED page with no extra fuel, assuming the aircraft will divert. The crew should be aware that this information is computed with defined assumptions e.g.:
　
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