As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AT ABOUT 800 AGL "AVIONICS SMOKE" ANNUNCIATED ON ECAM WITH CRC ECAM WARNING CONTINUED FOR ABOUT 7-10 SECONDS AND THEN CANCELED ITSELF. REPLACED COCKPIT DUCT SMOKE DET 13 WA PER AMM 26-15-12-4, OPS TEST IAW MM 26-15-00-5. OPS CHECK GOOD. A/C OK FOR SERVICE. REMOVED AND INSTALLED FROM FACT PREMATURE REMOVAL/INSTALLATION OFF MFG CG7G0-11.