As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF WITH ENGINE ICE ON AND WING ICE ON AFTER TAKEOFF, IN TAKE OFF POWER DETENT, AN ODOR OF BURNING OIL OR EXHAUST WAS PRESENT IN COCKPIT. THIS ODOR DECREASED ONCE POWER WAS BROUGHT OUT OF TAKE OFF DETENT AND WITH GASPERS OPENED. TROUBLESHOT AND FOUND APU TO BE PUTTING OIL IN ENVIRONMENTAL SYS. R & R APU WITH REPAIRED UNIT. OPS AND LEAK CHECKS GOOD IAW MM 49-000.