What was found
WHEN INCREASING THRUST TO CROSS RUNWAY, RECEIVED A VERY STRONG ODOR OF BURNING. POWER WAS APPROXIMATELY 30 - 40 %. ODOR WAS SIMILAR TO BURNING RUBBER. RETURNED TO GATE & INCREASED POWER, ODOR WAS NOT EVIDENT. EXPERIENCED A SIMILAR ODOR WITH SAME ACFT WHEN DEPARTING. ASSUMED ODOR WAS CREATED BY THE PRECEDING LANDING ACFT WHEN TIRES TOUCHED DOWN. RECENT ODOR WAS STRONGER. C/W AMM 05-51-56-2, NO ODOR NOTED AT THIS TIME, STARTED LT & RT ENG IAW JRH 05. NO ODORS NOTED. OPENED BOTH PACK BAYS IAW AMM 21-51-00-6. NO DEFECTS NOTED. OK TO CONT SERVICE.