What was found
PWS FAILED APPEARED ON BOTH NDS WITH TOGA, DISAPPEARED AT ROTATION AND THEN REAPPEARED FOR 2000 FT. REAPPEARED WITH LANDING FLAP SELECTION. ACFT GROUNDED. PERFORMED WEATHER RADAR OPS TEST, NO DISCREPANCIES NOTED. ON EXAMINING WEATHER RADAR TRANSCEIVER, NOTICED A STICKY WET RESIDUE ON THE CASE AND IT APPEARED TO HAVE DRIPPED DOWN INSIDE AS WELL. REPLACED WEATHER RADAR TRANSCEIVER WITH NEW UNIT. ACCOMPLISHED OPS TEST, ALL OPS NORMAL. REF MM 34-43-41,34-43-00, WDM 34-41-11,34-33-11,34-33-21. ACCOMPLISHED DFCS LRU INTERFACE TEST FOR LRRA, AND HGS SENSOR TEST FOR RAD ALT. ALL TEST PASS.