As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GROUND RETURN TO GATE DUE TO INTERMITTENT ECAM MSG AIR BLEED 1 & AIR BLEED 2 FAULT WHEN APPLYING FLEX TO THRUST THE PACKS WERE OFF & THE TAKEOFF WAS DISCONTINUED AT 40 KNOTS REVERSE THRUST WAS NOT APPLIED & AUTO BRAKES SYS DID NOT ACTIVATE. IAW AMM 36-12-52-000 400-001-A THE CROSS BLEED VLV WAS REPLACED TESTED SATISFACTORY IAW AMM 36-11-56-400-001-A.