As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FAT - RIGHT ENGINE DUCT LEAK LIGHT ILLUMINATED AFTER TAKEOFF AT APPROXIMATELY 4,000 FEET. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. MAINTENANCE INSPECTED BLEED AIR SYSTEM WITH NO EVIDENCE OF AIR LEAK NOTED. DEFERRED RIGHT ENGINE BLEED 'DUCT LEAK' LIGHT PER MEL 36-21-1. AIRCRAFT RETURNED TO SERVICE. MAINTENANCE SUBSEQUENTLY CLEARED THE PREVIOUSLY DEFERRED ITEM WITH THE REPLACEMENT OF THE NR 2 DEICE SYSTEM PRESSURE REGULATOR VALVE. (X)