What was found
GO-AROUND, 2 FLIGHTS IN A ROW L/G SYS DISAGREE ON LANDING ROLLOUT. R & R LGCIU 2 IAW AMM 32-31. TEST OK. DURING INSPECTION OF 29GA PROX SENSOR, FOUND LINKAGE BETWEEN LT MLG DOOR BYPASS VALVE AND UPLOCK W/ EXCESSIVE PLAY W/ GEAR DOOR CLOSED AND MANIPULATING LINKAGE LT MLG DOOR MOMENTARILY OPENS THEN CLOSES. REQUIRES FURTHER T/S. CONTINUED TROUBLESHOOTING, FOUND LEFT MLG BYPASS VALVE TO HAVE PLAY. REMOVED AND REPLACED LEFT MLG BYPASS VALVE 2517GM, REF AMM 32-31-13. OPERATIONAL CHECK GOOD, NO MESSAGES OR ERRONEUS LT GEAR DOOR MOVEMENTS. (LP: 8900216, AIRCRAFT WAS GROUNDED)