As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT GROUNDED FOR HEAVY MAINTENANCE. UPPER CARGO WINDOW FRAME R-21 HAS PITTED CORROSION ON LOWER SURFACE AREA. REMOVED AND REPLACED CARGO WINDOW FRAME NEW P/N 144N3250Y4 IN ACCORDANCE WITH STRUCTURAL REPAIR MANUAL 51-40-02 PARAGRAPH 7 AND DRAWING 144N3200.