Hi Threedp,
sorry for the late reply (real life got in the way)
I'm assuming this is the ETO version of the dam buster Lanc.
The pylon uses a lancaster texture to colour itself. if you go into your aircraft folder and open the ETO_Lanc_M3_Dam folder and then look inside the texture folder you should see 5 textures.
two have a AvH_GB_ prefix and two do not have this prefix, its these two files that the pylon uses.
Lancaster_mk3_AJM_t.dds
Lancaster_mk3_AJM_s.dds
If these are missing copy the main texure files and rename them to the above names and it should work.
If your still having trouble drop me a PM with your email and I'll send over the plane and pylons again for you.
regards Rob.