Försök:
$facSecComponentID = array();
$facSecComponent = array();
$facSecComponentType = array();
$facSecComponentThickness = array();
while ($row = mysqli_fetch_array($data)) {
$facSecComponentID[] = $row['facility_section_components_id'];
$facSecComponent[] = $row['roof_component_id'];
$facSecComponentType[] = $row['roof_component_type_id'];
$facSecComponentThickness[] = $row['component_thickness'];
}
$numItems = mysqli_num_rows($result);
for($i=0;$i<$numItems;$i++){
echo "<tr>";
echo "<td>{$facSecComponent[$i]}</td>";
echo "<td>{$facSecComponentType[$i]}</td>";
echo "<td>{$facSecComponentThickness[$i]}</td>";
echo "</tr>";
}