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until the radio altimeters become active.
But, if the radio altimeters fail, or if the FMGS receives no radio altimeter data, LOC,
G/S, and AP/FDs will disengage and FDs will re-engage on basic modes.
LOC capture assistance function
In NAV mode, and when within 20 NM of the destination runway, the aircraft is guided with
a track angle of 20~ from the LOC axis. This helps the aircraft intercept and capture the LOC
beam. When the ILS frequency or the ILS ident entered on the BAD NAV page differs from
the ILS of the destination runway entered in the Flight Plan :
- The aircraft loses the LOC capture assistance function ;
- The "RW~/ILS MISMATCH" message is displayed on the scratchpad ;
- The pilot should select HDG mode to perform the LOC capture.
Note : There is no glideslope capture assistance. The pilot shall ensure that the aircraft
flight path intercepts the G/S beam.
LAND MODE
Engagement conditions
LAND mode automatically engages when the LOC and G/S modes are engaged, and the
aircraft is below 400 feet RA. The FMA displays "LAND", indicating that LOC and G/S are
locked. No action on the FCU will disengage LAND mode. FLARE and ROLL OUT modes will
successively engage.
Disengagement conditions
LAND mode disengages :
- Upon engagement of the go-around mode ;
- If the pilot presses the APPR pushbutton, when the aircraft has been on the ground for
at least 10 seconds with the autopilot disconnected.
Note : When LAND is not displayed on the FMA, at/or slightly below 400 feet, the landing
capability degrades to CATI and the triple click is generated. No autoland is
authorized with CATI displayed on the FMA.
CCM ALL
┏━━━━━━━━━━━━━━━━┳━━━━━━━━┳━━━━━━━━━┓
┃I -~ A318 ┃ AUTO FLIGHT ┃1.22.30 P 52a ┃
┃ .*,,.8, ,, ~e~ A319 ┃ ┃ ┃
┃ Lli,~ A320 ┃ ┃ ┃
┃ ┃ ┣━━━━┳━━━━┫
┃ A~7-~'M" A321 ┃FLIGHT GUIDANCE ┃SEQ 001 ┃REV 33 ┃
┃ FLIGHT CREW OPERATING MANUAL ┃ ┃ ┃ ┃
┗━━━━━━━━━━━━━━━━┻━━━━━━━━┻━━━━┻━━━━┛
FLARE MODE
Once the aircraft reaches approximately 40 feet RA (the precise value is a function of V/S):
- The FLARE mode engages.
- The FMA displays "FLARE" in green.
At 30 feet RA, the aircraft flares on the pitch axis. If autothrust is active, thrust reduction
is activated.
When both AP/FDs are disengaged, FLARE mode disengages.
After main landing gear touchdown, the autopilot (if engaged) sends a nose down order.
CCM ALL
┏━━━━━━━━━━━━━━━━┳━━━━━━━━┳━━━━━━━━━━━┓
┃I ~-~ A318 ┃ AUTO FLIGHT ┃1.22.30 P 53 ┃
┃ aw aw ,, ~e~ A319 ┃ ┃ ┃
┃ ┃ ┣━━━━━┳━━━━━┫
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本文链接地址：
AIRBUS A320 Flight Crew Operating Manual2(63)
