As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MAIN LANDING GEAR FORWARD TRUNNION AIRFRAME ATTACH POINTS - FOUND SEALANT BROKEN AT SIX O`CLOCK POSITION OF BUSHING HAT AREA. REMOVED THE SECTION OF THE SEALANT THAT SEPARATED FROM BUSHING AND CORROSION AROUND THIS AREA, INBOARD SIDE OF THE UPPER OUTBOARD BUSHING. INSTALLED NEW BUSHING PER EA B757-57-021000.