What was found
AFTER TAKEOFF AT 800 ALT, RT ENG SURGED AGGRESSIVELY A LOUD BAND WAS HEARD & ENG EPR DECREASED FROM 1.92 TO 1.4. EXECUTED QRH 72.8 COMPRESSOR STALL. ENG REMAINED RUNNING & RETURNED TO FIELD AS A PRECAUTION. TAKEOFF PARAMETERS RT ENG -1.92 EPR, 90.6 N1, 622 EGT, 97% N2 & 10980 FF OAT 23.6. R & R PRBC IAW AMM 75-31-01. R & R SBCV IAW AMM 75-31-04. ENG CONTINUES TO COMPRESSOR STALL. REF LOG PAGE 520575 FOR CONTINUED TROUBLESHOOTING. MORE DETAILS TO BE ENTERED WITH PN ABOUT FINAL ROOT CAUSE, CORRECTIVE ACTION & PNS.