Train doors at Rear M2 car B2 door werenot proven closed. TC recycled train doors once - ok. Fault did not recur at subsequent stations. ~~~~~ 2669 Train doors at B2 were not proven closed. TC recycled train doors once - ok. Fault did not recur at subsequent stations. CE:N  ,OE depot check.  2669 ER D/L & found B2 door no FC. Found #2670 B3 door with FC 960 & FC 966 (door Comm error) ER showed TC cycled doors once. Replaced #2670 B3 DCP. Door cyclic test & door static timing test - OK. Push/pull gauge test & door gauge (10mm/20mm) test - Passed. Checked for FOD - Not Found for both doors. DIR was able to extinguish.  Lee JC 44677