As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TOP OF CLIMB, LT MANIFOLD TEMP INCREASED UNTIL NR 2 MAN AIR TEMP LIGHT CAME ON TEMP AT 265, NR 2 HIGH STAGE LIGHT ON. TURNED NR 2 BLEED OFF, MANIFOLD TEMP MOMENTARILY DECREASED THEN NR 1 MAN AIR TEMP LIGHT CAME ON. CYCLED TO MAINTAIN CABIN. BOTH NR 1 & 2 BLEED OFF TO MAINTAIN TEMP. REMOVED AND REPLACED NR 1 AND 2 ENGINES PRECOOLER VALVES PER MM 36-12-58. SYSTEMS FUNCTION NORMALLY.