As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GULFSTREAM CUSTOMER BULLETIN NR CB 337 REQUIRES X-RAY INSPECTION OF INBOARD LOWER PLANK SPLICES AND ULTRASONIC INSPECTION OF THE ADJACENT RISERS. SUBSEQUENT DISASSEMBLY FOR REPAIRS REVEALED EXTENSIVE CORROSION IN SPLICES AND RISERS NOT DETECTABLE BY THE SPECIFIED TECHNIQUES. N-NR YV28CP.