TC reported DIR indication was intermittent when entering DBG2. ~~~~~ 3702 TC reported DIR indication was intermittent when entering DBG2. CE : 701/702 monitored ok, no DIR indication illuminated when entering stations  701/702 no FC recorded on saloon doors on all 6 cars.    DIR dropped twice at 10:10 hrs. ATS logs & CDC logs D/L. Found #3702 guide arm securing bolts when pulled downwards, causing DIR/DM to light up. DLS checked on all saloon doors - OK. Cab door mechanism/rigging checked - OK. DIR relays/coil/contacts checked - Satis on #3702. Retightened 4x mounting bolts on guide arm. Function check by pulling downwards - Satis, no DIr/DM lit up.  Shaun Lau 45390