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A330/A340<br />
FLIGHT CREW<br />
OPERATING MANUAL<br />
ENGAGEMENT CONDITIONS OF LOC AND G/S MODES<br />
<strong>AIRCRAFT</strong> <strong>SYSTEMS</strong><br />
AUTO FLIGHT - FLIGHT GUIDANCE<br />
AP/FD COMMON MODES - APPROACH<br />
When ILS capture conditions are fulfilled:<br />
‐ LOC* mode engages, and<br />
‐ G/S* mode engages (No radio altimeter validity is required with this standard for G/S<br />
engagement).<br />
The FMA displays "LOC*" or "G/S*" or both in green.<br />
Nevertheless, G/S* mode cannot engage if:<br />
‐ LOC* mode is not engaged, or<br />
‐ The aircraft is above the glide path and its trajectory does not cross the ILS G/S beam.<br />
Once the aircraft is established on LOC axis:<br />
‐ LOC mode engages<br />
‐ G/S mode engages when the aircraft is established on G/S axis.<br />
The FMA displays "LOC"and "G/S" in green.<br />
The AP/FD guides the aircraft along the G/S down to 30 ft and along the LOC during the flare<br />
and roll out.<br />
Note: G/S* or G/S may engage at altitudes that are above the radio altimeter validity but the<br />
landing capability displayed on the FMA will reflect the lack of radio altimeter validity<br />
(CAT 1) until the RAs become active. If the radio altimeters fail: LOC, G/S and AP/FDs<br />
will disengage and FDs will reengage on basic modes.<br />
RJA A330/A340 FLEET DSC-22_30-80-30-10 P 3/8<br />
FCOM ← A → 30 MAY 12