TM 1-1510-218-10 3-49 (6)   As    the    aircraft     approaches    the    final approach fix, verify that the LEG mode is selected and that GPS is selected as the primary navigation source. (7)   Two nautical miles from the final approach  fix,  the  KLN  90B  will  make  a  prediction  to see if integrity will be available at the FAF and MAP.  If the prediction indicates that integrity monitoring will be available,  and  RAIM  is  currently  available,  the  KLN 90B  will  change  the  GPS  APR  annunciator  to  read ACTV and the status line will indicate APR.  Refer to Figure 3-66.  At this time, the KLN 90B will also start to change  the  CDI  scale  factor.    By  the  time  the  aircraft reaches the FAF, the GDI scale factor will be down to ± 0.3 nm full-scale deflection. Figure 3-66.  GPS Approach Mode Active NOTE Some approach procedures require adding up several along track distances to be able to identify a step down fix. (8)   A  step  down  fix  may  not  be  included  in the   list   if   waypoints   are   provided   in   the   database.   Identify  this  point  by  using  the  along  track  distances given    in    the    profile    view    of    the    approach   plate.   Remember, in the leg mode, the distance given by the KLN 90B is the distance to the next point (in this case, the  MAP),  not  the  distance  from  the  last  point  (the FAF). (9)   The KLN 90B will again provide waypoint alerting as the missed approach point is  approached.   This is shown on the Super NAV 5 page as a flashing active   waypoint   identifier,   as   well   as   the   external flashing waypoint annunciator.  If the auto scale factor was  chosen  for  the  Super  NAV  5  page,  the  airport diagram will be visible when the aircraft is within 5 nm of the airport.  More detail is shown as the aircraft gets to within 1 nm of the airport. NOTE If ATC instructions for the missed approach  are  different  from  the  published procedure, it is always possible to select a different   DIRECT   TO   waypoint   than   the default DIRECT TO waypoint. (10)   If a missed approach is required, the KLN 90B  will  not  automatically  sequence  past  the  missed approach   point.      To   perform   the   published   missed approach procedure, press the   D    button to bring up the  Direct  To  page.    The  default  waypoint  will  be  the first    waypoint    of    the    published    missed    approach procedure.    Confirm  this  waypoint  as  the  DIRECT  TO waypoint and press the ENT button. (11)   Upon   reaching   the   first   point,   the   KLN 90B will sequence to the next waypoint in the missed approach procedure. as.   Off Airport Navaid Approach. 1.   Load  the  approach  into  the  flight  plan.    If there is only one IAF, the KLN 90B does not  give  the  option  to  choose  an  IAF.    If there is no active flight plan (i.e., direct to navigation is  being used without an active flight  plan),  the  KLN  90B  will  ask  to  add the  airport  and  the  approach  to  FPL  0.   Refer to Figure 3-67. V22-KCVN PRESS ENT TO ADD KCVN AND APPR TO FPL 0   APPROVE? CRSR ENT Figure 3-67.  Load the Approach 2.   If ATC then clears the aircraft to the IAF, with the Super NAV 5 page displayed, pull out the right inner knob and scan through the   active   flight   plan.      Once   the   IAF   is displayed  in  the  scanning  window,  press the    D    button and then the   ENT button to initiate a direct to operation to the IAP. 3.   At a distance of 4 nm to the IAF, the KLN 90B will give the message, IF REQUIRED SELECT OBS.