What was found
ON TAKEOFF ROLL STRONG ODOR OF OIL OR AIR CONDITIONING SMOKE IN COCKPIT, REJECTED TAKEOFF. NO SIGN OF SMOKE COMING FROM VENTS, NO SMOKE WARNINGS, ALL INDICATIONS APPEAR NORMAL, RETURNED TO RAMP. FOUND NR 1 AND NR 2 PACK WATER SEPARATOR BAGS VERY DIRTY. REMOVED AND REPLACED WATER SEPARATOR BAGS IAW MM 21-51-16-4, OPS CHECK NORMAL. NO SIGN OF SMOKE OR OTHER SIGN OF ABNORMAL ODORS, OK FOR SERVICE.