8/18/2019 Ground Speed Mini Function

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PFPF   PNFPNFCommon LR 

GROUND SPEED mini function

50 kt

1

23

  20 kt

20 kt

TOWER WIND (entered in MCDU) = 330° / 08 kt

LR - Version 02a

08 kt

Actual Headwind :

8/18/2019 Ground Speed Mini Function

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PFPF   PNFPNFCommon LR 

1. Actual Headwind

1

23

20 kt

GSGS mini function

GS

140

120

140

120

SELECTED SPEED MANAGED SPEED

GS mini function

8/18/2019 Ground Speed Mini Function

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PFPF   PNFPNFCommon LR 

50 kt1

23

2. Headwind increases to 50 kt

SELECTED SPEED MANAGED SPEED

GS mini function

•  Current SPEED increases

•  SPEED trend is going up

• IAS target and current

SPEED increases

• SPEED trend is going up

GS

GSGS mini function

GS

140

160

140

160

• THR may be reduced to

IDLE in order to match the

SPEED target which

remains unchanged

• THR will be increased

20 kt

8/18/2019 Ground Speed Mini Function

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PFPF   PNFPNFCommon LR 

50 kt1

23

3. Headwind decreases to 20 kt

20 kt

SELECTED SPEED MANAGED SPEED

GS mini function

• Current SPD drops

• SPD trend goes down

•  Current SPD drops from ahigher SPD

•  Target SPD drops to VAPP

•  SPD Trend goes down

A/C ENERGY IS LOW   A/C ENERGY IS HIGHGS

GSGS mini function

GS

140

160

140

160

• THR is initially lowand can be close toIDLE & increase slowly

20 kt

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PFPF   PNFPNFCommon LR 

IAS TARGET VALUES & GROUND SPEED mini

Wind difference = CURRENT HEADWIND – TWR HEADWIND

IAS TARGET = Max [ VAPP, VAPP + WIND DIFF ]

GS mini concept has been defined to prevent the A/C energy from dropping below aminimum level during final approach. It is not displayed to the crew.

VAPP   + WIND DIFF

IAS TARGET