$arr = array();
foreach($_POST['sj'] as $key => $value) {
$eflt = $_POST['sflt'][$key];
$emodel = $_POST['smodel'][$key];
$eengine =$_POST['sengine'][$key];
$eloc = $_POST['sloc'][$key];
$estye = $_POST['sstye'][$key];
$ensvr = $_POST['snsvr'][$key];
$eehd = $_POST['sehd'][$key];
array_push($arr,"('$eflt','$emodel','$eengine','$eloc','$estye','$ensvr','$eehd')");
}
$inExp = mysqli_query($link,"INSERT INTO table_name(fltno,model,engine,loc,serviceType,nextSvr,usageHr) VALUES ".implode(',',$arr));
Do it with one query. Also you can do it with prepared statements easily..