#!/bin/perl

use strict;
use warnings;

while  (<DATA>) {
    print if /\*\sparameters after change\s\=/ .. /\*\sNRG location\s\=/;
}

__DATA__
<13>Nov 13 17:27:25 OamCOMM[12260]:
TIMESTAMP=Tue Nov 13 17:27:25 2018

...