56A: REVISED AEO ACCELERATION ALTITUDE

Question 1

With improving fuel efficiency and reducing carbon footprint in mind, SOP is being enhanced to revise the All Engine Operating (AEO) ACC ALT to ___ from 600 feet above runway threshold elevation. Lower acceleration altitude will minimise fuel burn because it implies that the flaps and slats are retracted earlier.

Answer 1

400 feet

Question 2

Crew may select higher value of THR RED/ACC ALT, if required

Answer 2

a. by airfield specific procedures (Terrain clearance requirement/ Noise abatement procedure/ SID climb gradient etc)

b. any other operational requirement ( adverse weather, bird activity etc)

Question 3

Windshear and Acceleration Altitude:
Windshear Detection is a function of Flight Augmentation Computers (FACs), and is not used by FMGC for SRS engagement. Thus, on reaching Acceleration Altitude, SRS will change to CLB/OPN CLB, regardless of windshear detection by FAC. If such conditions are expected, it is recommended to

Answer 3

increase the AEO Acceleration Altitude to 1500ft above Runway threshold elevation.