What was found
DURING PUSHBACK NR 1 ENGINE WOULD NOT START NO N2 ROTATION. PACK WAS OFF WITH GOOD DUCT PRESSURE AND STARTER VALVE OPEN ILLUMINATED. GROUNDED - YES. GROUND & POWER CHECKS GOOD PINS 1 & 2. DP1202 FOUND CONTAMINATION ON ENGINE STARTER CONTROL VALVE BETWEEN PINS 1 & 2 ON INNER GROMMET. CLEANED CONNECTOR & SECURED TO STARTER CONTROL VALVE. REF WDM 80-11-11. DRY MOTORED NR 1 ENGINE TWO TIMES, REF AMM 71-00-00-700-821-F00. ALL INDICATIONS AND OPS NORMAL.