As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE NRC Y185641; WHILE REPAIRING MISSING PRIMER ON BODY FRAME FAIL SAFE CHORD: AFT PIT RH SIDEWALL BODY SKIN STRINGER HAT FLANGES ARE CORRODED BS 927-947; STR 21R; WL 187. / FOUND CORROSION ON S-21R BS 927-947 TO 100% MATERIAL LOSS. REPAIRED STIRNGER IAW EA # 200295 REV. IR AND SWA EA # 1-753-36706 REV. IR. P/N:147A3210-36.