What was found
THE CREW REPORTED A PACK 1 VALVE FAIL MESSAGE FOLLOWED BY A SMOKEY ODOR, AND THAT IT APPEARED AFTER ICING CONDITIONS. THE ACFT WAS APPROVED FOR RETURN TO SERVICE. MAINTENANCE INSPECTED THE ACFT AND R & R SEVERAL LOOSE CLAMPS ON PACK 1, OPERATIONALLY TESTED WITH NO DEFECTS NOTED, CLEARED THE MEL, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.