Last time I checked the 777 had no ADRs, but when I get to work tomorrow, I will check.
Nope, no ADR. ADIRS. Air Data Inertial Reference System provides
primary, secondary and standby air data.
Inertial reference information.
Components are:
One ADIRU
One SAARU
Eight air data modules
six static ports
three pitot probes
two angle of attack vanes
two TAT probes.