What was found
ATB ETOPS - ACFT RETURNING TO OAK, CREW REPORTED ECAM, SKIN AIR OUTLET VLV MSG LIMITING ACFT TO FL10. PERFORMED AEVC TEST PER AMM 21-26-00-710-001-A. FOUND OUTER SKIN VALVE IN AMBER XXX. PUT THE OUTER SKIN OUTLET VALVE IN 45 DEGREES FOR DMI# 205115. REPLACED SKIN AIR OUTLET VALVE PER AMM 21-26-53-400-001-A, OPS CHECK OK, NO FAULT NOTED. OK FOR SERVICE.