As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN THE ENGINE ANTI-ICE WAS TURNED ON INFLIGHT AN UNUSUAL ODOR WAS NOTICED. NON-OIL & NON-SMOKE. COMPLIED WITH GND RUNS AT MAX TAKEOFF POWER FOR SEVERAL MINUTES & CYCLED ENGINE ANTI-ICE OFF & ON. NO NOTICEABLE UNUSUAL ODOR IN COCKPIT OR CABIN IAW 71-00-00.