What was found
AIRCRAFT WAS GROUNDED: INFO TO MX, AFTER DEPARTURE MMMX L/G GEAR NOT UPLOCKED ECAM , ACCOMPLISHED ECAM PROCEDURE AND ECAM CLEARED. FOUND L/H GEAR DOOR BYPASS VALVE ROD END BROKE. REMOVED AND REPLACED L/H GEAR DOOR RELEASE CABLE AND BYPASS VALVE PER AMM 32-13-13 AND AMM 32-12-16.