What was found
PDIS 659 36-10 2144 24SEP19 ATL FACT U LOGPAGES:3140271 NOTICED STRONG BURNING ODOR ON TAXI OUT IN ATL. AFTER GEAR UP CALL FLAPS 2 SYS FAULT BEFORE WE EVEN CALLED FOR SLATS RETRACT. STRONG BURNING SMELL CONTINUED ALL THE WAY TO GATE. SHGN 24SEP19 04:50 ATL U REF WRI 27-50/2148 FOR FLAP SYS 2 FAULT CORRECTIVE ACTION. FACT 24SEP19 05:22 ATL U RAN APU AND BOTH ENGINES WITH BOTH PACKS REF JRH ISOLATED EACH AIR SOURCE WITH LT AND RT PACKS COULD NOT DUPLICATE. HAD NO PRESENCE OF BURNING SMELL REF TSM 21-20-00 FIG 210 SHEET 2. A/C OK FOR SERVICE.