As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING OTHER MAINTENANCE, CORROSION WAS IDENTIFIED ON THE LEFT HAND AFT LOWER OUTBOARD SPAR CAP (P/N 5122041-23) AT WING STATION 222.0 TO 229.71. THE DEEPEST AREA OF CORROSION WAS MEASURED AT .033. THIS SPAR CAP WAS REPLACED WITH A FACTORY NEW PART.