What was found
DURING T/O ROLL, STRONG , FOUL MUSTY ODOR CAME OUT OF VENTS, BOTH IN COCKPIT AND THROUGHOUT ACFT. CAUSED CONCERN TO BOTH F/A AND PASSENGERS, DISSIPATED DURING CLIMB. DEBRIEFED CREW. ODOR ALSO PRESENT ON DECENT AT THROTTLE BACK. APU NOT RUNNING. PERFORMED TSM TASK 71-00-81-810-805-A. NO DEFECTS NOTED. PERFORMED HIGH POWER RUN FOR 10 MIN, NO ODOR DETECTED. R & R FWD FILTER ELEMENTS 4 EA IAW AMM 21-21-41-400-801-A, R & R AFT FILTER ELEMENTS, 2 EA IAW AMM 21-21-41-00-802 A, OK FOR SERVICE.