What was found
THE CREW REPORTED PACK NR 1 VALVE CLOSED DURING CLIMB, RESET IAW AOM V1, STAYED OK FOR 5 MINUTES THEN CLOSED AGAIN. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. THE ACFT WAS REMOVED FROM SERVICE. R & R NR 210 AND NR 230 LT ACM SLEEVES IN REFR TO AMM 21-51-03, THE OPS CHECK WAS GOOD AT THIS TIME. ADJUSTED THE LINEAR ACTUATOR IAW AMM 21-25-03. PERFORMED OPS CHECK IAW AMM 21-25-01. THE OPS CHECK WAS GOOD. THE ACFT WAS RETURNED TO SERVICE.