As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THROUGH FL210 IN ICE CONDITIONS RECEIVED BLEED AIR DUCT WARNING FOR L FUSELAGE DUCT RAN QRH AND RETURNED TO IWA AIRCRAFT REMOVED FROM SERVICE, INSPECTED LT WING FUSELAGE A-ICE DUCTS AND LOOPS IN LT WHEEL WELL AND AFT EQUIPMENT BAY NO DEFECTS NOTED, C/W OPS/LEAK CHECK OF 14TH STAGE BLEED AIR CONTROL PANEL AND WARNING SYSTEM IAW AMM 36-11-00, 36-21-00 AND 36-21-01 NO DEFECTS NOTED. UNABLE TO DUPLICATE.