NORMAL OPERATIONS
VISUAL APPROACH
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

visual approach
 
 

  NORMAL OPERATIONS
VISUAL APPROACH
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

  NORMAL OPERATIONS
VISUAL APPROACH
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

Intentionally left blank
 

  NORMAL OPERATIONS
PRECISION APPROACH
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

GENERAL
Applicable to: ALL
CAT II and CAT III approaches are flown to very low DH (or without DH) with very low RVR. The guidance of the aircraft on the ILS beam and the guidance of the aircraft speed must be consistently of high performance and accurate so that an automatic landing and roll out can be performed in good conditions and, the acquisition of visual cues is achieved and the aircraft properly stabilized. Hence,
? The automatic landing is required in CAT III operations including roll out in CAT IIIB.
? The automatic landing is the preferred landing technique in CAT II conditions
? Any failures of the automated systems shall not significantly affect the aircraft automatic landing system performance
? The crew procedures and task sharing allow to rapidly detect any anomaly and thus lead to the right decision
DEFINITION
Applicable to: ALL
DECISION HEIGHT
The Decision Height (DH) is the wheel height above the runway elevation by which a go around must be initiated unless appropriate visual reference has been established and the aircraft position and the approach path have been assessed as satisfactory to continue the automatic approach and landing safely. The DH is based on RA.
ALERT HEIGHT
The Alert Height (AH) is the height above the runway, based on the characteristics of the aeroplane and its fail-operational automatic landing system, above which a CATIII approach would be discontinued and a missed approach initiated if a failure occurred in one of the redundant parts of the automatic landing system, or in the relevant ground equipment.
In others AH definition, it is generally stated that if a failure affecting the fail-operational criteria occurs below the AH, it would be ignored and the approach continued (except if AUTOLAND warning is triggered). The AH concept is relevant when CAT 3 DUAL is displayed on FMA.
On single aisle Airbus family, the AH =100 ft.
CAT 3 SINGLE
CAT 3 SINGLE is announced when the airborne systems are fail passive which means that a single failure will lead to the AP disconnection without any significant out of trim condition or deviation of the flight path or attitude. Manual flight is then required. This minimum DH is 50 ft.
 

  NORMAL OPERATIONS
PRECISION APPROACH
　
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