As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT FROM SPOKANE, THE RIGHT BLEED AIR DUCT INDICATED 64 PSI. THE LEFT INDICATED 45 PSI. BOTH ENGINES PRODUCING 89.7% N1. IN CRUISE FLIGHT BOTH BLEED AIR DUCTS INDICATED 35PSI. GROUNDED - YES. REMOVED AND REPLACED #2 ENG PRSOV REF B737-9 AMM 36-11-04.