What was found
RIGHT PACK SURGING, DUCT PRESSURE DROPS TO 5 PSI. TRANSFERED TO MDDR NR 139725 MEL 21-51-01-01 CAT "C" DUE DATE 28DEC20. PERFORMED RT PACK TEMP CONTROLL BITE, IAW FIM 21-51 FAULT TREE 845 FOUND FAULT LOW LIMIT VALVE. R & R K10318 RELAY, PER WDM 21-51-22 LOW LIMIT VALVE RELAY. OPERATIONS CHECKS GOOD. NO FURTHER DEFECTS NOTED.