What was found
CABIN STATION 800, STRINGER 8R & 9R, BELT FRAME CRACKED AT INBD RIVET. CUT OUT DAMAGED SECTION OF FRAME & INSTALLED REPAIR. INITIATED A ZONE 3 DIP OF A RIVETED FRAME REPAIR TO RE-INSPECT AT 12 ,000 FLIGHT CYCLES FROM INSTALLATION OR 50,000 AIRFRAME CYCLES, WHICHEVER COMES FIRST IAW SRM 53-00-07 REPAIR 1.