As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT BLEED OFF DISCRETE LIGHT ILLUMINATED DURING TAXI.AC RETURNED TO GATE (BTB) AND MTX GROUNDED AC .PERFORMED ENGINE RUN IAW AMM 71-00-00 VALUE OPERATED NORMALLY WITH PACKS ON AIRCRAFT REMAINS NON-ETOPS + CATIIIA. AND RETURNED AC TO SERVICE