What was found
AIR RETURN TO DEPARTURE, AVIONICS EXTRACT VALVE REMAINED FULLY OPEN AFTER TAKEOFF WHEN EXTRACT BUTTON WAS IN NORMAL AND OVRD. REMOVED AND REPLACED VALVE SKIN AIR OUTLET IAW AMM 21-26-53-04, OPS CK NORMAL, OK FOR SERVICE. (K)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIR RETURN TO DEPARTURE, AVIONICS EXTRACT VALVE REMAINED FULLY OPEN AFTER TAKEOFF WHEN EXTRACT BUTTON WAS IN NORMAL AND OVRD. REMOVED AND REPLACED VALVE SKIN AIR OUTLET IAW AMM 21-26-53-04, OPS CK NORMAL, OK FOR SERVICE. (K)