ISSUE DESCRIPTION 1
ONE OPERATOR HAS REPORTED THAT:
-FLYING ABOVE FL 350
-THE VLS IS OVERLAPED BY THE ALPHA PROT
SOLUTION
-ABOVE FL 350, SPECIFICATION IS SUCH THAT, VLS COMPUTED VALUE IS SIMILAR TO THE ONE OF ALPHA PROT SPEED.
-AN INCREASE OF THE VLS VALUE OF 2 OR 3 KTS ABOVE FL 350 WAS IMPLEMENTED IN THE FAC STANDARD XXXXX
ISSUE DESCRIPTION 2
In certain conditions (between fl 150 and fl 300) V alpha prot is too high and may exceed green dot speed
SOLUTION
the cause of this phenomenon is a wrong optimization of the speed Calculation law. This misbehavior has been corrected In the fac A321.
Relevant documentation OEB 115/1
(from an old airbus SB) so yes wrong computer coding may give wrong calculations and wrong indications on your pfd ...
Last edited by pilot-737; 24th Dec 2014 at 20:40.