As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MQY - WHILE PERFORMING THE NDT PHASE OF CP/CP TASK 55-10-011 (NDT OF HORIZONTAL STABILIZER ATTACH BOLTS), A CRACK WAS DETECTED IN ONE BOLT (P/N 137367F9). THE CRACK WAS DETECTED JUST BELOW THE BOLT HEAD TO LOAD BEARING SURFACE. ALL FOUR ATTACH BOLTS WERE REPLACED WITH NEW UNITS AND AIRCRAFT RETRNED TO SERVICE. ALL REMAINING BOLTS UNDERWENT NDT INSPECTION, PASSED AND WERE RETURNED TO SERVICE. (M)