A NEW B737-700 ACFT APU FUEL LINE SHROUD/RESERVOIR HYD OVERBOARD VENT DRAIN MAST WAS ROBBED PRIOR TO ACFT BEING ACCEPTED INTO PARTS DATABASE.

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I WAS ON SHIFT AS A SUPVR OF MAINT OPS ON JUN/XA/07 WHEN AN APU FUEL LINE SHROUD/RESERVOIR HYD OVERBOARD VENT DRAIN MAST WAS ROBBED FROM ACFT X TO FACILITATE IMMEDIATE REPAIRS OF ACFT Y IN ZZZ. ALTHOUGH AS A FLOOR SUPVR OF 6 MAINT CTLRS I WAS AWARE THAT A DRAIN MAST WAS BEING ROBBED FROM HANGAR ACFT I DID NOT PERSONALLY COMMUNICATE TO MAINT TO ROB THIS MAST. AFTER ACFT Y DEPARTED IT WAS DISCOVERED THAT THIS PARTICULAR ACFT HAD NOT RECEIVED THE NECESSARY SIGNATURE REQUIRED TO BE PLACED ON OUR OP LIST AND THEREFORE NOT APPLICABLE FOR REMOVING PARTS TO FACILITATE RETURNING OTHER ACFT TO REVENUE SVC. I IMMEDIATELY TOOK ACTION AND CALLED THE MAINT SUPVR ON DUTY AND ASKED THAT WHEN THE ACFT ARRIVED TO DOCUMENT THIS DRAIN MAST AS DISCREPANT AND AWAIT AN APPROPRIATE REPLACEMENT MAST. THE MAST FROM ACFT YYY WAS REMOVED AND RETURNED TO ACFT XXX FOR REINSTALLATION. ROBBING PARTS IS A COMMON PRACTICE AND PROCEDURAL GUIDANCE IS PROVIDED IN MAINT MANUAL. I AM FAMILIAR WITH THIS MANUAL AND AT THE TIME THERE WERE NO EXCLUSIONS FOR ACFT RECENTLY DELIVERED FROM BOEING. WE ACCEPT NEW ACFT ON A MONTHLY BASIS AND HISTORICALLY THE NEED TO ROB PARTS FROM THESE ACFT IS VERY INFREQUENTLY REQUIRED. IN RETROSPECT; IT IS TRANSPARENT TO ME THAT THIS ACFT WAS NOT ON OUR OP EQUIP AND THEREFORE NOT AVAILABLE TO BE ROBBED. WITH THAT SAID; I WAS NOT AWARE OF THE INCLUSIVENESS OF THIS PARTICULAR ACFT HAVING THE OP EQUIP CERTIFICATION AT THAT TIME. MOREOVER; SINCE THIS INFRACTION I HAVE CREATED AN OP EQUIP CERTIFICATION LOG CONTAINING THE FUTURE NEW DELIVERY SCHEDULE IN SEQUENCE WITH THE DELIVERY DATE AND A SUPVR SIGNATURE BLOCK AND DATE/TIME THE NEW ACFT HAS RECEIVED THIS CERTIFICATION. THE LOG ALSO CONTAINS THE CONTACT NUMBERS OF RESPONSIBLE INDIVIDUALS FOR THIS CERTIFICATION. THIS LOG WILL BE MAINTAINED ON THE SUPVR DESK IN MAINT CTL. ADDITIONALLY I WILL INSTRUCT ALL SUPVRS TO VERIFY OP EQUIP INCLUSIVENESS; SIGN AND DATE THE LOG; AND SEND AN EMAIL NOTIFICATION TO ALL MAINT CTLRS VIA EMAIL TO MAINT CTL.