Commercial Fixed Wing
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Loss Of Aircraft Control
General None Reported / Taken
Airport
Tarmac concrete is rough-it provides friction. Lead in lines use thick non-porous paint which the aircraft nose gear drives on. When wet/covered in melted salt or deicing fluid; the nose wheels get no traction. I have seen nose slide on the line after parked in wet conditions when windy; and slow moving aircraft skid when line is wet. On this flight; the parking personnel had the plane needing to turn. The nose wheel turned; but the aircraft continued in an inertia inspired Newton's 1st law way...it continued on its original path. The pilots turned the nose gear more; and the aircraft still continued in on its original course. When the plane came to rest; without adjusting; the parking personnel told the crew they still needed to move forward; but they were as close to the park spot as possible; moving forward would have just made it worse.
Ground employee painted taxi-in line reported to be slippery when wet.