What was found
DURING TAXI OUT, LE SLAT ASYM EICAS MESSAGE ILLUMINATED. A/C RETURNED TO BLOCKS (BTB). MEG CHECKED AND VERIFIED INDUCTANCE OF PROX SWITCH S305.. ADUSTED GAP TO TARGETS REF B767 AMM 27-22-01. SLAT FUNCTIONS AND INDICATIONS NORMAL, REF B767 AMM 27-22-01. AIRCRAFT RETURNED TO SERVICE.