What was found
(CAN) AFTER TAKE OFF ENGINE #1 ENCOUNTERED AN ENGINE STALL AT INITIAL CLIMB PASSING 1500FT, THE CREW REPORTS THAT THEY HEARD A COUPLE OF `THUMPS`, AND THEN NOTICED THE N2 DROP. THEY PERFORMED THE QRH AND THEN THE ENGINE WAS FINE, BUT THEY ONLY ATTEMPTED TO 50%. AIRCRAFT RETURNED TO AIRPORT. AIRCRAFT ON GROUND IN FOR TROUBLE SHOOTING. (TC# 20190403011)