Lower end of the VFE section
Vso - stall speed at AUW (max all up weight)
Green arc
From vs1 to vno
Light twin vsi red and blue lines in the slow speed section
Red - VMCA
Blue - VYSE
Reading TAS at altitude
Under - reads due to density error
Errors with the ASI
IMP
Compressibility - CAS to EAS
Density - EAS to TAS
Blockages in the descent
PUD - pitot blocked will cause an under read
SOD - static blocked will cause an over read
Blockages during the climb
POC - pitot will cause an over read
SUC - static will cause an under read
Leakage in the lines to the ASI
Within the pitot line - under read due to less pitot
Static within the pressure hull - oppose the pitot and under read