I was saying earlier (NET LOST MY MESSAGE) that according with the pictures in:
http://www.hamburg-airport-friends-f...d=2607#pid2607
it is important the "g" on ground contact. Back in '80-s as RCAR eng., I was changing two years official messages with the designers before clearing to service a TU154, after a wingtip contact with snow in a low viss. app. GA at Berlin SFX.