What was found
PERFORMED AIR RETURN AFTER N1 FAN VIBRATION ON NR 2 ENGINE ASSOCIATED WITH AIRFRAME VIBRATION. VERTICAL DESCENT RATE LESS THAN 360 FPM AT TOUCHDOWN. LANDING WEIGHT 51,000 LBS. OVERWEIGHT LANDING INSPECTION NOT REQUIRED. RT ENGINE UPPER TRANSLATING COWL OPENED IN FLIGHT. REMOVED AND REINSTALLED ORIGINAL DAMAGED UPPER TRANSLATING COWL IAW CRJ AMM 71-11-01 AND REQUIRED REO FROM SHORTS FOR DAMAGE. COMPLIED WITH REQUIRED REO 601R-78-33-3528 REV WC20 FOR TAP TEST. APPLIED PAINT TO SCRATCH. APPLIED YELLOW DOT TO DENT. (M)