As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT DUCT PRESSURE SPLIT WITH LEFT FLUCTUATION 10 PSI. AT 6000' N1'S LT /89.6 RT /89.6 DUCT PRES L 42 TO 50 PSI / R 30 PSI. FLUCTUATION STABILIZED 8-10 THOUSAND FT WITH ONLY SMALL SPLIT. CRUISE TO TOD APPROX 8-10 PSI SPLIT. AT IDLE DESCENT 1-2 PSI SPLIT L 24/ R 26 PSI AT 40.3 PERCENT. REMOVED AND REPLACED NR 2 ENGINE BLEED AIR REGULATOR PER MM 36 11 03. LEAK CHECK GOOD. ACCOMPLISHED ENGINE BLEED AIR CROSSOVER OPS TEST PER MM 36 11 00 710 801. OPS CHECK GOOD.