What was found
AFTER A PURCHASE OF A/C, A/C WAS HANGERED AND PREPPED FOR INTERIOR REFURBISH. UPON INSPECTION OF LT AND RT FRONT SEATS BEFORE PRIMING AND REPAINTING, CRACKS FROM APPROX. 270 TO 320 DEGREES AROUND WERE DETECTED EXTENDING FROM WELDS AT SUPPORT BRACKETS CONNECTING UPPER TUBULARS OF SEAT FRAME. IF LEFT UNDETECTED, THE RT SEAT WOULD HAVE SEPARATED AT FRONT BRACKETS (SEAT FRAME SEPARATION) CAUSING FRONT PASSENGER TO FLING BKWD WITHOUT NOTICE. LT SEAT HAD ONLY ONE CRACK, BUT WOULD CAUSE PRESSURE ON (ADJACENT) SEAT FRAME SUPPORT BRACKETS AND POSSIBLE SEPARATION. GRIND OUT CRACKS AND WELD (TIG OR OXY/ACET GAS) BY AUTHORIZED INDIVIDUAL, OR REPLACEMENT OF SEAT FRAMES.