As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRON MUSTYODOR ON T/U GOES AWAY AT THRUST REDUCTION REAPPEARS LATER IN THE FLIGHT ON DESCENT.-THE AIR EVENT TSM 05-50-00-810-831-A ACCOMPLISHED INSPECTION OF APU AND BOTH ENG'S CARRIED OUT. NO LEAKS NOTED PACKS ON GROUND NO ODOR NOTED.