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? At 350 ft, LAND must be displayed on FMA. This ensures correct final approach guidance.
? Below 200 ft, the AUTOLAND red light illuminates if
‐ Both APs trip off
‐ Excessive beam deviation is sensed
‐ Localizer or glide slope transmitter or receiver fails
‐ A RA discrepancy of at least 15 ft is sensed.
? Flare comes at or below 40 ft
? THR IDLE comes at or below 30 ft
? RETARD auto call out comes at 10 ft for autoland as an order. (Instead of 20 ft for manual landing as an indication)
VISUAL REFERENCE
Approaching the DH, the PF starts to look for visual references, progressively increasing external scanning. It should be stressed that the DH is the lower limit of the decision zone. The captain should come to this zone prepared for a go-around but with no pre-established judgement.
 
NORMAL OPERATIONS
PRECISION APPROACH
 

 
Required conditions to continue
? With DH
In CATII operations, the conditions required at DH to continue the approach are that the visual references should be appropriate to monitor the continued approach and landing and that the
flight path should be acceptable. If both these conditions are not satisfied, it is mandatory to initiate a go-around. A 3 lights segment and a lateral light element is the minimum visual cue for JAR OPS.
In CATIII operations, the condition required at DH is that there should be visual references which confirm that the aircraft is over the touch down zone. Go-around is mandatory if the visual
references do not confirm this. A 3 lights segment is required by JAR OPS for fail passive system and 1 centerline light segment for fail operational system.
? Without DH
The decision to continue does not depend on visual references, even though a minimum RVR
is specified. The decision depends only on the operational status of the aircraft and ground equipment. If a failure occurs prior to reaching the AH, a go-around will be initiated. A go-around must nevertheless be performed if AUTOLAND warning is triggered below AH. However, it is good airmanship for the PF to acquire visual cues during flare and to monitor the roll out.
Loss of visual reference
? With DH before touch down
If decision to continue has been made by DH and the visual references subsequently become inappropriate a go-around must be initiated.
A late go-around may result in ground contact. If touch down occurs after TOGA is engaged, the AP remains engaged in that mode and A/THR remains in TOGA. The ground spoilers and auto-brake are inhibited.
? With DH or without DH after touch down
If visual references are lost after touch down, a go-around should not be attempted. The roll-out should be continued with AP in ROLL OUT mode down to taxi speed.
FLARE/LANDING/ROLL OUT
During the flare, decrab and roll-out, the PF will look outside to assess that the autoland is properly carried out, considering the appropriate visual references.
　
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