What was found
INFLIGHT SHUTDOWN AIR TURN BACK, DURING TO ROLL, AT LEAST ONE LARGE BIRD WAS INGESTED BY NR 1 ENGINE. TOWER ADVISED SMOKE & FLAMES ERRATIC ENGINE INDICATION BUT NO OVERHEAT OR FIRE INDICATION. ENGINE WAS SHUT DOWN & FIRE SWITCH PULLED. R&R NR 1 ENGINE IDG AIL/OIL COOLER PANELS, FAN BLADE SET IAW MM.