As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATW - RT STRUCTURE AFT OF FRAME 50, THERE IS A DIAPHRAGM BETWEEN THE UPPER AND LOWER SPEED BRAKE LOWER HINGE LONGERONS THAT HAS A CRACK IN THE LIP OF ITS LIGHTNING HOLE, APPROXIMATELY .3750 INCH LONG. CORRECTIVE ACTION: STOP DRILLED CRACK END PER AVRO FAX. NO CRACKS. GEN WC FOR 2000 CYC REINSP. PERF'D ET AND LOCATED END OF CRACK.