What was found
DURING 1000-HOUR AIRFRAME INSPECTION FOUND TWO RIVETS MISSING FROM LH FRAME 4 WEBBING APPROX. 39” FROM FLOOR AND WEB DISTORTED IN THE AREA. ON RH SIDE SAME HIGHT 39” ABOVE FLOOR A 6.5-INCH CRACK IN THE WEBBING AT FRAME 4. WHEN DISASSEMBLY FOR REPAIR ON 6.5 -INCH CRACK DISCOVERED LOWER FRAME ANGLE CRACKED. REPAIR OF FRAME 4 WEB DISTORTED SECTION WAS COMPLETED UNDER RDAS-EC135-53-2022-002B. THE REPAIR OF CRACKED LOWER ANGLE WAS INSTALLING NEW DOUBLER PN SK-0085-21 IAW ADAS AHI-135-53-001-22.