As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT EQUIPMENT COOLING SUPPLY EXHAUST OFF LIGHT ILLUMINATED DURING CLIMB, LEVEL OFF, AND THE FIRST PART OF DESCENT. SELECTING ALTERNATE DID NOT WORK-IN NORMAL. ON THE GROUND THE LIGHT EXTINGUISHES. COULD ONLY DUPLICATE IN FLIGHT. *S/D* PROBLEM WAS CAUSED BY THE LOW FLOW SENSOR. AFTER REPLACEMENT OF THE LOW FLOW SENSOR, SYSTEM OPERATED NORMAL.