TM 1-1510-218-10 3A-40 NOTE A TX FLT is indicated if the Strut switch is configured  to  be  active  and  the  aircraft is on the ground. Table 3A-3.  Hard Failure Annunciations ANNUNCIATION FAILURE TX FLT Transmitter failure 429FLT Loss of 429 bus data ANT FLT Loss of antenna position IN FLT 6 Loss   of   communication between display and ART Soft   failures   are   those   that   can   cause   limited system  operation.    Radar  data  will  still  be  displayed, but  the  flight  crew  should  be  aware  that  the  display does not necessarily represent the true weather.  Soft failures are typically configuration problems, stabilization problems, or some similar problem.  Refer to Table 3A -4 for soft failure annunciations. Table 3A-4.  Soft Failure Annunciations ANNUNCIATION FAILURE TX FLT Configuration   module   not being read STAB LMT Stab is exceeding ±30° STAB OFF Alert  that  the  scan  is  not being stabilized d.  Weather Radar System Operation. Never operate the weather radar in the Wx, WxA,   LOG   or   GND   MAP   modes   on   the ground when personnel are forward of the aircraft    wing    and    within    5    feet    of    the aircraft    nose.        Failure    to    observe    this warning  may  result  in  permanent damage to the eyes and other body organs of those persons. Never   turn   the   radar   on   within   5   feet   of containers     of     flammable     or     explosive material.        Never    operate    radar    during fueling operations.  NOTE These procedures should be accomplished prior to flight. (1)   Accomplish the following procedure completely and exactly. 1.   Function switch – TST. 2.   TILT   –   UP   7.0,   as   shown   on   the indicator display, upper right corner. The  test  pattern  will  appear.    See  that  the  test pattern  conforms  to  the  illustration.    Refer  to    Figure 3A-23.  The test pattern is sized to fit the 80 nm range and can be scaled with the range buttons, and observe the “update” action as a small ripple moves across the display along the outer edge. Figure 3A-23.  Test Pattern With the function switch in  TST or SBY, taxi to a clear    area    where    there    are    no    people,    aircraft, vehicles,   or   metallic   buildings   within   approximately 100 yards. 3.     Function switch – ON. The indicator will automatically display in the Wx mode   and   80-nm   range.      Any   targets,   weather   or ground,   will   be   displayed   in   green,   yellow,   red,   or magenta. NOTE A    60-second    warm-up    time    period    is required before the system will transmit. 4.   RNG   ¬    button    –   Press   to   display 40 nm as the maximum range. 5.   WxA button  – Press and observe the magenta areas (if any) flash. WARNING