NORMAL OPERATIONS
APPROACH GENERAL
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL
In order to achieve that goal, the aircraft ground speed should never drop below GS mini in the approach, while the winds are changing. Thus the aircraft IAS must vary while flying down, in order to cope with the gusts or wind changes. In order to make this possible for the pilot or for the A/THR, the FMGS continuously computes an IAS target speed, which ensures that the aircraft ground speed is at least equal to GS mini; the FMGS uses the instantaneous wind component experienced by the aircraft:
IAS Target Speed = GS mini + Current headwind component
This target speed is limited by VFE -5 in case of very strong gusts, by VAPP in case of tailwind or if instantaneous wind is lower than the tower wind.
example
NORMAL OPERATIONS
ILS APPROACH
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL
PREFACE
Applicable to: ALL
This chapter deals with some characteristics of the ILS approach. Recommendations mentioned in APPROACH GENERAL chapter apply.
For CAT1 ILS, the crew will insert DA/DH values into MDA (or MDH if QFE function is available) field on the MCDU PERF APPR page, since these values are baro referenced.
For CATII or CATIII ILS, the crew will insert DH into DH field on MCDU PERF APPR page, since this value is a radio altitude referenced.
INITIAL APPROACH
Criteria: SA
1 Applicable to: MSN 0045-0499
NAVIGATION ACCURACY
The navigation accuracy will be monitored throughout the approach and the crew will be prepared to modify the approach strategy if required. If NAV ACCURACY DOWNGRAD message is displayed on ND, the crew will use raw data to crosscheck navigation accuracy.
Navigation accuracy determines which autopilot modes the flight crew should use, and the type of displays to be shown on the ND.
NAVIGATION ACCURACY ND AP/FD mode
PF PNF
NAV ACCUR HIGH ARC or ROSE NAV with navaid raw data NAV
NAV ACCUR HIGH
NAV ACCUR LOW and NAV
ACCURACY check ≤1 nm
GPS PRIMARY LOST and NAV ACCUR
LOW and NAV ACCURACY check > 1 nm ROSE ILS ARC or ROSE NAV
or ROSE ILS with
navaid raw data HDG or TRK
Aircraft flying within
unreliable radio navaid area
FLYING REFERENCE
The crew will select HDG V/S on the FCU i.e. "bird" off. APPROACH PHASE ACTIVATION
For a standard ILS, the crew should plan a decelerated approach. However, if the G/S angle is greater than 3.5 ° or if forecast tail wind at landing exceeds 10 kt (if permitted by the AFM), a stabilized approach is recommended.
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