What was found
REPLACED NR 1 ENGINE FAN INLET CASE DUE TO CRACKED FLANGE B WELD WITH OVERHAULED ASSEMBLY; FAN CASE P/N 786269, S/N DX6417, NR 1 BEARING HOUSING P/N 765471, S/N JU7622 AND REAR SUPPORT P/N 5003534-01, S/N LX9712 IN ACCORDANCE WITH PRATT AND WHITNEY MAINTENANCE MANUAL 72-20-00, MNT PRAC-00. REFERENCE NON-ROUTINE WORK ORDER NR 1014975, DATED 15 JULY 2011. CARRIED OUT VIBRATION ANALYSIS IN ACCORDANCE WITH PRATT & WHITNEY JT8D EMM 72-00-00. DATA PEAKS ARE EXHAUST 1.20 MILS, INLET 1.05 MILS USING N1 REFERENCE SPEED AND EXHAUST 1.14 MILS AND INLET 1.09 MILS USING N2 REFERENCE SPEED; ARE WITHIN LIMITS. REFERENCE NON-ROUTINE WORK ORDER NR 1015018, DATED 16 JULY 2011.