What was found
FLIGHT CREW REPORTED AVIONICS VENT SKIN VALVE FAULT ALONG WITH BLOWER FAULT. TOMC UPDATE- PRECAUTIONARY REMOVE AND REPLACE 22HQ SKIN AIR OUTLET VLV. REF TSM TASK 21-26-00-810-84-A, TESTED AEVC ON MCDU, TESTED OK, LAST LEG REPORT, SKIN AIR OUTLET V 22HQ AND ISOL V 24HQ. REMOVED SKIN AIR OUTLET VALVE REF AMM 21-26-53. INSTALLED NEW SKIN AIR OUTLET VALVE REFERENCE AMM 21-26-53-400-001-A. ALSO PREFORMED OPS CHECK REFERENCE AMM 21-26-00-710-001-A. OPS CHECK GOOD. REPLACED DEFECTIVE PART.