My question stems from this other question: Why is training regarding the loss of RAIM given so much more emphasis than training regarding the loss of SBAS?
Two answers say losing RAIM puts a question mark on the integrity of the GPS position. And losing SBAS only affects LPV approaches.
Yet from this other question, Why weren't SA-On GPS units updated to become SA-Aware?
According to Advisory Circular (AC) 90.114A CHG1, now and past 2024, SBAS-equipped planes do not need to do a preflight prediction check.
Why skip the important RAIM prediction step?
RAIM = Receiver autonomous integrity monitoring
SBAS = Satellite-based Augmentation System
LPV = Localizer performance with vertical guidance