As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR CONDITIONING DUCT PRESSURE SPLIT OVER 20PSI. LEFT 50 RIGHT 29 PSI. ACCOMPLISHED NR 2 ENGINE BLEED AIR SYSTEM HEALTH CHECK IAW AMM 36-11-00-700-801. NR 2 ENGINE HIGH STAGE VALVE AND PCCV FAILED. HIGH STAGE VALVE DID NOT MANUALLY OPEN AND CLOSE SMOOTHLY AND PCCV POSITION INDICATOR DID NOT CLOSE WITHIN 30 DEGREES OF CLOSED AT 14 PSI. REPLACED HIGH STAGE VALVE AND PCCV IAW AMM 36-12-02-000-801 AND AMM 36-11-06-000-801. LEAK AND OPS CHECKED GOOD.