What was found
DURING CRUISE, A BRIEF BURNING ODOR FOLLOWED BY REPORTS OF A BANGING SOUND FROM ROWS 8-9-10, AFTER LANDING, CABIN GOT VERY HOT, NO PRESSURIZATION ISSUES WERE NOTED. TROUBLESHOT IAW ETN-EM-72-034 AND EO-EM-2100-048. R & R THE NR 1 ACM IAW AMM-21-51-03. OPS AND LEAK CHECKED GOOD IAW AMM 21-51-00. REMOVED AND REPLACED HEAT EXCHANGER IAW AMM 21-51-02 OPS CHECKED IAW AMM 21-51-00. OPS & LEAK CHECKED GOOD. ACFT GOOD FOR SERVICE.