What was found
AFTER TAKEOFF LT ENGINE BEGAN SURGING AND HAD A NOTICABLE THUMP LIKE A COMPRESSOR STALL. ALT 2000' AGL. POWER AT CLIMB, RETARDED THROTTLE RETURNED TO DEPARTURE. PERFORMED BORESCOPE OF NR 1 ENGINE LP, IP, HP, COMPRESSOR AND LP, IP, HP, TURBINE IAW AMM 72-00-00-6-2. NO LIMITING DEFECTS NOTED. INSPECTED NR 1 ENG CHIP DETECTORS FOR CONTAMINATION, NONE NOTED. R & R NR 1 ENG BVCU REF MM 75-32-01-4. RAN NR 1 ENG AT MAX EPR IAW JRH, ALL INDICATIONS NORMAL. ENGINE DOES NOT SURGE OR STALL. PERFORMED TEST OF THE NR 1 ENG BLEED SHIFT REF MM 71-00-00-5-3. ALL TEST PASSED