What was found
RECEIVED AINTIICE DUCT WARN MSG. CW QRH RH FUSELAGE WAS RED. MSG CLEARED WITHIN 30 SECONDS OF SELECTING 14TH STAGE SOVS CLOSED. FLAP OVERRIDE IS STUCK ON ***AIRCRAFT REMOVED FROM SERVICE**** PERFORMED INSPECTION OF BLEED AIR DUCT INSIDE THE FUSELAGE, FOUND NO DEFECTS. PERFORMED ENGINE RUNS CANNOT DUPLICATE ANTI-ICE DUCT WARNING, REQUIRES FURTHER T/SING. OPS CHECK NORMAL AT THIS TIME NO DEFECTS NOTED WITH FLAP OVERRIDE SWITCH. REF 326528/4 FOR NEW DISCREPANCY. SEE WO 302214 WCS 1-8 FOR C/AS OF REPLACEMENT OF 14TH ST BLEED AIR DUCT LOOP. OPS CHECKS GOOD AT THIS TIME.