What was found
BTB 1418Z - REASON FOR BTB WHEN TAKING THE RUNWAY FOR DEPARTURE, STRONG FUMES / ODOR ENTER THE COCKPIT, SOUCE UNKNOWN AS PER AMC AND TECH SUPPORT REQUEST, PERFORMED BOTH AIR CONDITIONING SYSTEM OPERATION WITH APU OPERATION AND BOTH ENGINE RUN PER AMM21-00-00-201. AND AMM71-00-00/501. NO SMOKE AND ODOR NOTED. PHYSICALLY CHECKED BOTH WXR TRANSCEIVER AND ANT DRIVE UNIT NO ABNORMALITIES FOUND. BOTH WXR SYSTEM