What was found
AFTER DESCENT WITH POWER AT IDLE, ON LEVEL OFF WITH POWER UP, DIRTY ODOR IN COCKPIT. ODOR STRONG AT FLIGHT POWER UP, BUT DISAPPEARS FAIRLY QUICKLY WITH CONSISTENT POWER. HAPPENED TWICE ONCE ON EACH DESCENT. COMPLIED WITH INFORMATION NOTICE 2017-T015B SECTION A LEVEL NR 1, AIRCRAFT IS OK FOR SERVICE.