As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT MADE AN AIR RETURN WHEN THE ENGINE NR 1 SHOWED THAT THE ENGINE 1 BLEED VALVE WAS CLOSED. MAINTENANCE R & R THE NR 1 ENGINE BLEED VALVE REF AMM 36-11-05 AND IPC REF 36-11-05, FIGURE 1A ITEM. OPS CHECK GOOD AND WAS RELEASED BACK TO SERVICE.