A cable harness grommet for installation in an aircraft interior component, and method of installing the same. The cable harness grommet seals a honeycomb panel cut-out and seals the cable harness itself as the cable harness passes through the cut-out by way of an aperture in the cable harness grommet. The honeycomb panel cut-out is enclosed by the cable harness grommet such that the cable harness grommet closes and seals the honeycomb panel cut-out and the aperture around the cable harness itself, both in compliance with applicable airworthiness requirements.