MD80 CREW HAD MULTIPLE ENG STALLS IN CYYZ CLASS E AIRSPACE.

Narrative

NORMAL PREFLT AND TAXI PROCS FOLLOWED BY DEICING. COMPLETED NORMAL TKOF CHKLIST. WAITED FOR ATC DEP RELEASE TIME. NORMAL TKOF AND CLBOUT. NORMAL CHKLIST AT 10000 FT. PASSING 12000 FT; FELT APPROX 3 COMPRESSOR STALLS AND HEARD AND FELT VIBRATIONS. ALL ENG INDICATIONS WERE NORMAL. REDUCED PWR AND LEVELED AT 12800 FT. DECLARED EMER; BRIEFED FLT ATTENDANTS AND PAX. RETURNED TO YYZ. COMPLETED NORMAL DSCNT AND LNDG CHKLISTS. PWR WAS REDUCED AND AUTOTHROTTLES WERE OFF AS A RESULT OF THE LEVELOFF. VIBRATION WENT AWAY WHEN THE PWR WAS REDUCED. VIBRATION RETURNED ON FINAL WHEN LNDG CONFIGN WAS ACCOMPLISHED. LNDG WAS MADE BY FO SO I (THE CAPT) COULD WATCH FOR A POSSIBLE ENG FAILURE OF EITHER ENG. TWR AND CFR WERE NOTIFIED OF POSSIBLE ENG FAILURE ON FINAL. NORMAL LNDG WITH MEDIUM AUTOBRAKES ACCOMPLISHED WITH IDLE REVERSE. CLRED RWY. CFR SAID R ENG WAS SMOKING. SECURED R ENG. RETURNED TO GATE ON L ENG. POSTFLT SHOWED BLADES BENT NOSE FORWARD ON R ENG AND CIRCUIT BREAKER FOR R ENG; L SIDE VALVE; ANTI-ICE POPPED. SUPPLEMENTAL INFO FROM ACN 570992: HEARD A MUTED POP WITH A CONTINUOUS VIBRATION. ALL ENG INDICATIONS NORMAL AFTER SEVERAL SECONDS 2 OR 3 POPS IN QUICK SUCCESSION. AT THIS POINT; I TURNED AUTOTHROTTLES OFF AND REDUCED PWR. VIBRATION CEASED AT REDUCED PWR. RETURNED TO FIELD AFTER DECLARING EMER. ACCOMPLISHED NORMAL CHKLIST AND PROCS TO A NORMAL LNDG. DURING APCH; VIBRATION RETURNED ANY TIME PWR EXCEEDED 1.35 EPR. CLRED RWY AND STOPPED AND HAD OUTSIDE EXTERIOR INSPECTION COMPLETED. SHUT DOWN R ENG AND TAXIED TO THE GATE. POSTFLT SHOWED FAN BLADES BENT ON R ENG. FOUND L ANTI-ICE VALVE; R ENG POPPED.