What was found
82081 APROX 1200 FT AGL EXPERIENCED WHAT WE THOUGHT WAS A LEFT ENG COMPRESSOR STALL. HEARD A LOUD BANG SURGE IN EGT. INSTRUMENTS RETURED TO NORMAL IN A SECOND. DECLARED AN EMERGENCY AND RETURNED TO MEM REMOVED AND REPLACED LEFT ENGINE PER 7180260-01-01,5410600-00-01, 7180260-01-02, AND 2400400-01-01 . ALL REQUIRED RUNS, OPS AND LEAK CHECKS SATISFACTORY. A/C OK FOR SERVICE. COMPLETED LEFT ENGINE INLET COWL INSTALLATION REF AMM 71-11-01-4. OPS AND LEAK CHECKS GOOD. A/C OK FOR SERVICE.