As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE FLIGHT CREW COMPLAINED OF FEELING LIGHT HEADED WITH ASSOCIATED HEADACHES. MAINTENANCE DETERMINED THE SMELL TO BE COMING FROM THE BLEED AIR SYSTEM. A NEW BLEED AIR PIPE WAS INSTALLED THE PREVIOUS NIGHT. SUBMITTER FELT THE PIPE MAY HAVE BEEN TREATED WITH A COATING THAT BURNED OFF WITH THE HOT BLEED AIR PASSING THROUGH THE NEW ASSY.