What was found
DURING TAKEOFF, IMMEDIATELY AFTER ACFT BECAME AIRBORNE, HEARD 3-4 LOUD BANGS FROM WHAT SOUNDED LIKE THE LT ENG. BELIEVE IT WAS POSSIBLY A COMPRESSOR STALL. RIGHT ENG UNEXPECTED SURGE. BELIEVE THE RT ENG SURGE WAS DUE TO THE LT ENG COMPRESSOR STALL. C/W ENGINE DOWNLOADS TO MCC, IT WAS DETERMINED THE LT ENGINE HAD NO ENGINE SURGES/ISSUES. RT ENGINE SHOWED ONE SINGLE SURGE EVENT. THIS PROMPTED RT ENGINE CHANGE. REMOVED RT ENGINE. RT ENGINE INSTALLED IAW EMM 72-05-22 REV.12 AND CH-350 AMM REV. 39 OPERATIONAL TEST REQUIRED PERFORMED OPERATIONAL CHECK IAW HONEYWELL 72-05-22 REV.12 AND CH350 AMM REV 39.VERIFIED .RIGGING/ADJUSTMENT REQUIRED OPERATIONAL TEST SATISFACTORY.