What was found
PACK LIGHT LIGHT ON DURING CLIMB, LIGHT COMES ON AGAIN AFTER RES ET LEFT ACFT RETURNED TO GATE WITH NO FAULT LIGHTS ILLUMINATED ON THE 6 PACK OR OVERHEAD AIRCOND PANEL. ALSO PERFORMED A BITE TEST ON BOTH PACK/ZONE CONT''S. NO FAULTS. IN ADDITION, RAN L&R PACKS FOR 35 MINUTES CHANGING TEMP FROM FULL HOT TO COLD.SYSTEM RESPONDED TO ALL INPUTS. NO FAULTS. FINALLY,TOMC REQUESTED THE LEFT AND -(006)(007) AND 21-61-00-700-001 UNABLE TO DUPLICATE FLIGHT CREWS DISCREPENCIES. REF; MM21-61-860 ACAIN ON BOTH CONT''S. NO FAULTS AND BOTH PACKS WORK NORMAL. RIGHT PACK CONTROLLERS. AFTER THE SWAP I PERFORMED A BITE TEST