What was found
DURING M-CHECK FOUND MAIN CABIN STA 712 LBL 45 FLOORBEAM WEB LOWER SUPPORT ANGLE CRACKED. REMOVED DAMAGED ANGLE AT STA 712 LBL 45, FABRICATED NEW SUPPORT ANGLE IAW DC9 DWG 5910464, HEAT TREATED NEW ANGLE PER PEMCO TRAVELER 2281N01724 TREATED, PRIMED, & INSTALLED NEW SUPPORT ANGLE IAW DC9 SRM 51-10-3, 51-30-2, 51-30-5.