As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK MODERATE BURNT ODOR RIGHT PACK MODERATE ODOR NOT BURNT SOME EYE IRRITATION AWARENESS BOTH CA AND F/O. R & R AIR CYCLE MACHINE I.A.W B757 MM 21-51-03. OPS CHECK, AND LEAK CHECK SATISFACTORY. NO CURRENT EVIDENCE OF BURNT ODOR PRESENT. OK FOR CONTINUED SERVICE