As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L ENG HSPRV EICAS MSG WITH BIG SPLIT OF DUCT PRESSURE IN DESCENT. REPLACED CARD M859 REF MM. REPLACED LT HPSOV CONTROLLER. ALSO REPLACED M859 REF CH2240. RAN BOTH ENGS, DUCT PRESSURES MATCHED THRU BLEED SHIFT, WITH NO LT ENGINE HPSOV MESSAGE OR BLEED DISCRETE LIGHT AT ANY TIME.