What was found
TUS FLIGHT 2505 RETURN TO FIELD: NR 1 ENGINE VIBRATION 2.4 MILS. MAINTENANCE REPLACED FAN BLADES IHI1387N, IHI1392N, IHI1399N, IHI1429N, IHI1495N, IHI1501N, IHI1683N, IHI1693N, INI1702N, IHI1735N, IHI1737N IHI1739N, IHI1741N, IHI1744N, IHI1745N, IHI1747N, IHI1748N, IHI1751N, IHI1752N, IHI1754N, IHI1758N, IHI2178N, IHI2192N, IHI2193N, IHI2778N, IHI2874N, IHI3774N, IHI5186N. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.