As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
14TH DUCT WARNING MESSAGE IN FLIGHT, COMPLIED WITH QRH MESSAGE CAME BACK TWICE MOMENTARILY. AFTER LANDING P/L IDLE MESSAGE CAME BACK STAYED ON GROUND RAN A/C AT VARIOUS POWER SETTINGS. RAN ALL SYSTEMS ASSOCIATED WITH 14TH STAGE BLEED, NO FAULTS NOTED. PER MAINTENANCE CONTROL SWAPPED LOOP CONTROL UNITS. OPS CHECK GOOD. (M)