What was found
ON CLIMB OUT, CREW FELT VIBRATION IN THE LT ENG & 20 SECONDS LATER RECEIVED A LT FAN DAMAGE CAS MSG. PERFORMED THEIR CHECKLIST, DECLARED AN EMER & DIVERTED BACK SAFETY. AT THE MOMENT, WE SUSPECT A BIRD, FOD, WAS INGESTED INTO THE ENG. FOUND NO DAMAGE TO THE ENG. ENG RUNS WERE PERFORMED WITH NO ABNORMAL RESULTS & THE ACFT WAS RELEASED FOR SERVICE.