What was found
ON TAKEOFF ROLL APPROACHING 80 KTS STRONG SMELL OF DIRTY SOCKS / LAUNDRY IN COCKPIT. CONTINUED TO APPROX 7000 FT. WITH ENGINES AT TO POWER / CLIMB POWER APU OFF. FLIGHT ATTENDANTS REPORTED NO SUCH SMELL IN CABIN. FLIGHT CREW OXYGEN USED FOR SEVERAL MINUTES WHILE SMELL SUBSIDED. SMELL DETECTED AGAIN DURING DESCENT AT 4000 FT DESCENDING WITH ENGINES AT APPROX 40% N1. NOT AS STRONG AS ODOR ON TAKEOFF ROLL PERFORMED TROUBLE SHOOTING PER FIM TASK 21-20-00-810-801-A AND FIM TASK 21-20-00-810-803-A, PERFORMED EMB TRIAD WORK SCOPE, PERFORMED IDLE ENGINE RUN AND HIGH POWER ENGINE RUN, COULD NOT DUPLICATE ABNORMAL SMELL, NO FUALTS OR DEFECTS WER NOTED WHILE ACCOMPLISHING FIM TASK 21-20-00-810-801-A AND FIM TASK 21-20-00-803-A.