What was found
********************MAJOR*****************************WHILE AC WAS IN FOR HVY CK FOUND LH H-STAB INTERNAL RIBS 10A, 11A, 12A CRACKED. MX REPLACED RIBS PM 170-62571-002 IAW SB170-55-0014, 170EO-55-10-0004-1 SEE AAR NRC# 4500975-3000-0084 FOR WORK PERFORMED. AC REMAINS IN YQG FOR COMPLETION.**********************MAJOR*********************