What was found
MCI - FLT 8189 - NOSE GEAR RED LIGHT WAS ILLUMINATED IN-FLIGHT. GEAR EXTENSION NORMAL. FOUND UPLOCK TARGET MISSING. INSTALLED TARGET AND ADJUSTED SENSOR, PERFORMED GEAR SWING, OPS CHECK NORMAL PER MM 32-61-41. UNABLE TO BURN FUEL OUT OF CENTER TANK WITH LEFT BOOST PUMPS ON. FOUND WRONG P/N INSTALLED IN LEFT CENTER BOOST PUMP CHECK VALVE. INSTALLED CORRECT BOOST PUMP CHECK VALVE PER MM 28-22-71. REF: OPERATOR CONTROL NR P2EA98160.