As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF THROTTLES WERE 2 KNOB WIDTH APART ON CLIMB NR 1 ENG W/N REACH FULL PWR. DURING DESCENT NR 1 IDG ADVISORY ILLUM AND TEMP REACHED 144 DEG. REMOVED AND REPLACED PRSOV DIFFUSER CASE LINER REWORKED. REMOVED AND REPLACED AIR HEAT EXCHANGER SOV VALVE.