What was found
LOUD BOOM & AIRFRAME SHUDDER EXPERIENCED ON CLIMBOUT, AUTOPACK TRIP ACTIVATED. ENGINE FAIL LIGHT BLINKED MOMENTARILY, BUT STAYED OUT. SUSPECT COMPRESSOR STALL BUT UNABLE TO IDENTIFY ENG. ALL ENG INSTRUMENTS NORM. BORESCOPED ENGINES 1, 2, 3 PER MM 72-00-00-1. NO DAMAGE BEYOND MM LIMITS WAS NOTED. ENG RUN WAS COMPLIED WITH, ALL CHECK OK.