What was found
DURING HEAVY CHECK, FWD CARGO DOOR CUT OUT AFT SEAL REST IS CORRODED. MX REMOVED AND MATCH DRILLED AND REPLACED FWD CARGO DOOR CUT OUT AFT SEAL REST IAW SRM 51-40-02 SEAL REST TO BE INSTALLED ON TASK CARD R190-53-21-009-0414, NO FURTHER ACTION REQUIRED ON THIS CARD NON FCS. PN 170-66803-402, SEAL REST.