What was found
AFTER TAKEOFF, ECAM WARNING "LANDING GEAR RETRACTION INOP". ECAM DIRECTED "L/G LEVER DOWN, MAX SPEED 270 KTS, AUTOBRAKE DISARM", THEN "PROC FUEL CONSUMPTION INCREASED" ALSO RECEIVED "WINDSHEAR ALERT NOT AVAILABLE" AND "AUTO THROTTLES DISARMED". ALSO "ALPHA FLOOR UNAVAILABLE". CHECKED PROXIMITY DETECTOR CONTROL UNIT TSM 32-61-00. NO FAULTS OR FAULT HISTORY NOTED. JACKED AND CYCLED GEAR SEVERAL TIMES ON SYS 1 AND 2 WITH NO FAULTS REF MM 32-31-00-5. INSPECTED UPLOCKS AND PITCH DAMPNERS. GEAR APPEARED TO BE DRY. LUBRICATED ALL 3 GEAR IAW MM 12-22-32-00-0. NO FAULTS ON PROXIMITY BOX, REPLACED PROXIMITY BOX AS PRECAUTIONARY REF MM 32-31-71-04-0 BITE TEST PASS.