Below query can be handy to explode and Query BOM Details
SELECT DISTINCT LPAD (' ', LEVEL * 2) || LEVEL order_level , msib.segment1 assembly_item , msib.description assembly_description , msib.inventory_item_status_code assembly_item_status , SYS_CONNECT_BY_PATH (msib2.segment1, '/') PATH , msib2.segment1 AS component_item , msib2.description component_item_description , msib2.inventory_item_status_code component_item_status , bic.item_num , bic.operation_seq_num , bic.component_quantity FROM bom.bom_components_b bic , bom.bom_structures_b bom , inv.mtl_system_items_b msib , inv.mtl_system_items_b msib2 , mtl_parameters mp WHERE 1 = 1 AND bic.bill_sequence_id = bom.bill_sequence_id AND SYSDATE BETWEEN bic.effectivity_date AND Nvl(bic.disable_date, SYSDATE) AND bom.assembly_item_id = msib.inventory_item_id AND bom.organization_id = msib.organization_id AND bic.component_item_id = msib2.inventory_item_id AND bom.organization_id = msib2.organization_id AND mp.organization_id = msib.organization_id AND mp.organization_code = :p_org_code /* organization here */ AND bom.alternate_bom_designator IS NULL START WITH msib.segment1 = :p_item_number /* component item to be used here */ CONNECT BY NOCYCLE PRIOR bic.component_item_id = msib.inventory_item_id ORDER BY PATH