What was found
(CAN) AFTER TAKE-OFF, CREW RECEIVED THE RH 14TH STAGE DUCT WARNING LIGHT. AIRCRAFT RETURNED TO DEPARTURE POINT. MAINTENANCE RECTIFICATION INCLUDED THE BLEED AIR LEAK CONTROL BEING REPLACED IAW AMM TASK 36-21-10-400-801 AND THE ISOLATION SHUTOFF VALVE ALSO REPLACED AND TESTED IAW 30-12-07-400-801. AIRCRAFT RE-DEPARTED, HOWEVER, AFTER TAKE-OFF AT 900 FEET, CREW AGAIN RECEIVED A 14TH STAGE DUCT WARNING. CREW ACTIONED THE QRH, DECREASED POWER ON THE RIGHT ENGINE TO IDLE, DECLARED A PAN PAN AND RETURNED TO THE DEPARTURE POINT. FLIGHT LANDED SAFELY. MAINTENANCE RECTIFICATION HAD THE R/H PYLON SENSING ELEMENT REPLACED AND TESTED SERVICEABLE IAW AMM 36-21-04-400-807. NO RE-OCCURRENCE. (TC# 20190625025)