What was found
LAV SMOKE ALARM AFTER T/O & SMOKE WAS SEEN BY F/A & SMELLED IN COCKPIT. RTF WITH TOUCHDOWN SINK RATE OF 300 FPM. SMOKE DID CLEAR AFTER 5 MINUTES. INSPECTED LAV LIGHTS AND WIRING. FOUND UPPER LAV LIGHTS INOP, RESEATED BALLAST. LAV LIGHTS OPS CHECK GOOD . NO EVIDENCEOF SMOKE OR BURNING FOUND. PER REQUEST FROM MOCC, GROUND RAN ENGINES TO FULL POWER, NO EVIDENCE OF SMOKE OR FUMES DETECTED, OPS CHECK GOOD. OK FOR SERVICE.