LATERAL NAVIGATION
With the AP/FD in NAV the aircraft will follow the programmed SID. If a geviation from the programmed SID is required e.g. ATC vectors or weather avoidance, select HDG. Is selected the climb mode reverts to OP CLB. when cleared to a specific waypoint, perform a DIR TO to ensure correct waypoint sequencing. And re-egage CLB MODE.
VETERAL NAVIGATION
The AP/FD Climb modes may either
• MANAGED
• SELECTED
Both climb modes can be flown with either managed selected speed
MANAGED CLIMB MODE
The managed AP/FD Mode in Climb is CLB. Its use is Recommended as long as the aircraft is cleared along the F-PLN. Although CLB Mode will try to observe altitude constraints, the next climb altitude is always set on the FCU. CLB MODE will not adjust aircraft speed to achieve altitude constraints.
SELECTED CLIMB MODE
The selected AP/FD modes in climb are OP CLB or V/S OP CLB is to be used if ATC gives ruddar Vector or Clears the aircraft direct to a given FL without any climb constraints any programmed FMGS Climb constraints will be ignored. The use of low values of V/S e.g. 1000 fpm or less, may be appropriate for small altitude changes as it makes the guidance smoother and needs less thrust variation. In areas of high traffic density. Low values of vertical speed will reduce the possibility of nuisance TCAS warning. As a guide, a value of +1000 ft/min is appropriate when in close proximity to other aircraft. The A/THR MODE will automatically revert to speed and adjust thrust to maintain the target speed. Whenever V/S Is used, pay particular attention to the speed trend as V/S the aircraft may be unable achieve both the selected V/S and target speed with Max climb thrust in this case the AP/FD will guide to the target V/S, and that A/THR will command up to Max climb thrust and allow the speed to decelerate. When VLS is reached the AP will pitch the aircraft down so as to fly at a V/S to maintain VLS.
Tags:
Airbus a330