As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: STRONGE ODOR (EXHAUST) IN FLIGHT DECK DURING INITIAL CLIMB . DISSIPATED AFTER THRUST REDUCTION. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU. MAINTENANCE CLEANED THE APU / APU LOAD COMPRESSOR AND ACCOMPLISHED A LEAK CHECK WITH NO LEAKS NOTED. A DECONTAIMATION OF THE ENVIRONMANTAL SYSTEM COMPONENTS WAS ACCOMPLISHED WITH NO ODORS NOTED.