As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE RIGHT BLEED FAILED TO OPEN WHEN BLEED SWITCH SELECTED TO AUTO POSITION, WILL OPEN AT LOW POWER SETTING BUT AUTO COARSEN WHEN POWER ADVANCED. AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED THE RIGHT BLEED VALVE. RAN AC AND OPS AND SECURITY CHECKS GOOD.