As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AVIONICS PROBLEM, FLIGHT DIVERTED. AVIONICS VENT SKIN VLV FAULT AFTER T/O. FOLLOWED FLT MAN BOTH BLOWER AND EXTRACT VLV TO OVERRIDE, NOW INLET VLV SHOWS CLOSED BUT EXTRACT SHOWS FULL OPEN. SAMC TEXT: EXTRACT VLV SHOULD SHOW CLOSED IN THIS CONFIGURATION SUSPECT VALVE HAS FAILED. DID TROUBLESHOOTING USING TSM 21-26-00. LAST LEG FAULT SHOWED SKIN AIR OUTLET VALVE 22HQ FAULTING. REPLACED SKIN AIR OUTLET VALVE 22HQ PER MM. RAN TEST, TESTS OKAY.