If at any time after the entry of an order for the summary administration of an estate it appears that the gross value of the estate, after deducting any encumbrances, exceeds $300,000 as of the death of the decedent, the personal representative shall petition the court for an order revoking summary administration. The court may, if deemed advisable considering the nature, character and obligations of the estate, provide in its order revoking summary administration that regular administration of the estate may proceed unabated upon providing such portions of the regular proceedings and notices as were dispensed with by the order for summary administration.