As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON SKIN UPPER EDGE OF LH AND RH WING REAR SPAR BTW XCW=0 TO XW=60 (THROUGH LH AND RH MLG (SPECIFICALLY XCW=30)). SUMMARY OF NRC 00169: CORROSION LEVEL 2. CORROSION ON SKIN UPPER EDGE OF LH AND RH WING REAR SPAR BTW XCW=0 TO XW=60 WAS REPAIRED PER PRI 619422-14 REV 2 AND ER/A 619422-14 REV ORIGINAL, SECTION I: PERMANENT REPAIR. ASSOCIATED ER/A 14-619422 ADDED FOR AC 9550. (LP #0499064)