As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POWERPLANT ENGINEERING REPORTED NR 2 ENGINE SHOWS AN INCREASE IN DELTA EGT, FUEL FLOW WITH A CORRESPONDING DECREASE IN HOT DAY MARGIN. POSSIBLE PNEUMATIC LEAK OR HOT SECTION DETERIORATION MAY BE SUSPECT. ACFT GROUNDED. TSR 906074 BITE CK EEC. NO FAULTS FOUND. WHILE LK CK NR 2 ENG PNU, FOUND PRSOV LEAKING AIR AT BELLOWS COVER. R & R PRSOV REF MM 36-11-04.