What was found
AFTER REMOVAL OF INSULATION BLANKETS IN PREPARATION FOR AIRFRAME MAJOR ALTERATION OF AIRCRAFT COMPLETION CENTER, A CRACK 1.80 LONG WAS DISCOVERED AT STATION 1960 STRINGER SPLICE ON STRINGER S-10L. FURTHER INSPECTION OF OTHER STRINGERS DETECTED CRACKS IN MULTIPLE STRINGERS AT MULTIPLE STATIONS. THUS FAR, CRACKS HAVE BEEN IDENTIFIED IN THE FOLLOWING AREAS: S-11L, S-10L, S-5R, S-6R, S-7R, S-12R. ADDITIONAL CRACKS HAVE BEEN IDENTIFIED VISUALLY, BUT HAVE NOT YET BEEN FULLY DOCUMENTED. VERIFICATION VIA NONDESTRUCTIVE TESTING IS BEING CONDUCTED ON STRINGERS AT THE FOLLOWING STATIONS: 740, 1000, 1241, 1283, 1350, 1480, 1740, 1960, AND 2180. NOTE: THE INFORMATION IS ALSO BEING REPORTED BY THE BOEING COMPANY VIA THE CONTINUED OPERATIONAL SAFETY PROGRAM(COSP). REFER TO BOEING COSP REPORT #2020-0261. (THIS REPORT SUBMITTED BY 145 REPAIR STATION B72R2480, BOEING AEROSPACE OPERATIONS INC. 375 AIRLIFT DRIVE SECOND FLOOR/C-43 SAN ANTONIO, TX 78226-1604.) CAUSE HAS NOT YET BEEN DETERMINED. LAB TESTING WILL BE ACCOMPLISHED AND REPORTED TO COSP REPORT #2020-0261. REFER TO BOEING AEROSPACE OPERATION, INC. NONCONFORMANCE REPORT (NCR) NUMBER NCR1017665N.