ACFT EQUIP PROB - FLC RETURNS AND LANDS WHEN THE L ENG INDICATES SERIOUS DAMAGE.

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I DEPARTED ASX RWY 02. AT APPROX 1200 FT AGL ALL OCCUPANTS HEARD A POP SOUND. THE L ENG SPOOLED BACK TO APPROX 45 PERCENT. I TOLD MY FO THAT WE WILL BE RETURNING BACK TO ASX; ENTERED A L DOWNWIND ADVISED ON 122.80. WE LANDED WITH A GOOD R ENG AND WITH THE PWR LEVER ON #1 AT IDLE. THE COMPANY SENT A REPLACEMENT PLANE FOR THE PAX. THE NEXT DAY A REPLACEMENT ENG WAS INSTALLED ON THE 1ST ACFT. A TOTAL OF 8 OR SO 1ST AND 2ND STAGE COMPRESSOR BLADES WERE FOUND DAMAGED. POSSIBLE CAUSE - ICE BROKE OFF FUSELAGE DURING TAXI TO HANGAR EARLIER IN THE DAY AND WAS INGESTED BY THE L ENG. AFTER ICE WAS MELTED OFF OF PLANE; IT WAS TAXIED BACK TO THE PICK UP POINT AND ENG RUN UP WAS CONDUCTED AND BOTH ENGS PERFORMED FINE. A PREFLT WAS CONDUCTED AND NOTHING OUT OF THE ORDINARY WAS NOTED. AFTER THE ABOVE DEP WAS PERFORMED AND A RETURN FOR LNDG WAS MADE A MORE CLOSER VISUAL INSPECTION WAS MADE AND ONLY SLIGHT INCLUSIONS WERE VISIBLE ON A 1ST STAGE COMPRESSOR BLADE. THE ORIGINAL PLAN WAS TO TOW THE PLANE INTO THE HANGAR; BUT BECAUSE OF THE 2000 OR SO FOOT DISTANCE TO THE HANGAR AND THE TYPE OF TUG TO BE USED; THE TUG OPERATOR DID NOT FEEL THAT SUFFICIENT TRACTION WAS AVAILABLE AND DID NOT WANT TO BE RESPONSIBLE SO HE ASKED ME TO TAXI THE PLANE TO THE HANGAR. I BROKE OFF ALL THE ICE ON THE LEADING EDGE OF THE WINGS; INSPECTED THE ENG NACELLES; INLETS; ETC; AND THEN TAXIED TO THE HANGAR.