As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW - FLT 626 - ON DESCENT WITH AIRFOIL ANTI-ICE ON, THE SUPPLY PRESSURE HIGH LIGHT CAME ON SEVERAL TIMES AND DUCT PRESSURE WAS 60 PSI. EACH TIME IT CORRECTED ON ITS OWN. REMOVED AND REPLACED AIRFOIL ICE PROTECTION HIGH PRESSURE SWITCH. SYSTEM OPS CHECK GOOD IAW MM 30-10-5. (M)