As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUCT PRESSURE SPLIT, GREATER THAN 20 PSI AT FL 370. LEFT DUCT 40 PSI , RIGHT DUCT 14 PSI , N1'S APPROXIMATELY 80%. GROUNDED - YES. REPLACED NR 2 ENGINE PRESSURE REGULATOR BLEED SHUTOFF VALVE PER AMM 36-11-04-400-801 PERFORMED HEALTH CHECK PER AMM 36-11-700-804, ALL GROUND CHECKS ARE GOOD.