TM 1-1510-218-10 3-78 (21)   IF    REQUIRED    SELECT    OBS    -    The aircraft  is  4  nm  from  a  waypoint  which  could  be  used as  the  basis  of  either  a  procedure  turn  or  a  holding pattern. (22)   INSIDE SPC USE AIRSPACE  - Aircraft's present   position   is   inside   an   area   of   special   use airspace. (23)   MAGNETIC   VAR   INVALID   ALL   DATA REFERENCED     TO     TRUE     NORTH -     Magnetic variation   is   invalid   due   to   operation   outside   of   the database   magnetic   variation   area   without   having   a pilot entered magnetic variation. (24)   MSG ANNUNCIATOR FAIL - This message  appears  when  there  is  a  failure  of  the  KLN 90B  MSG  annunciator  drive  circuitry.    To  determine  if message  alerting  is  being  given,  check  the  display  of the KLN 90B. (25)   NAV    SUPER    FLAG    FAILURE    -    This message   appears   when   an   internal   test   fails   for   a specific NAV flag output.  The KLN 90B is still usable.   HSI and autopilot should be used with caution. (26)   NO RCVR DATA - The GPS receiver fails a  specific  internal  test.    The  unit  will  not  provide  any navigation capability. (27)   NO   RS -232   DATA   -  Appears  when  no input  is  received  on  the  RS -232 input, such as a fuel management or air data system. (28)   OBS WPT > 200 NM  - The KLN 90B is in the OBS mode and the distance to the active waypoint is   more   than   200   nm.      The   system   will   perform normally,  however,  at  this  distance  the  deviation  bar will   be   extremely   sensitive   to   changes  in  selected course. (29)   OTHER WAYPOINTS DELETED - Appears when the message WAYPOINT___ DELETED    would    be    effective    for    more    than    10 waypoints. (30)   POSITION DIFFERS FROM LAST POSITION BY > 2NM - Appears when the GPS sensor first  reaches  the  NAV  mode  if  the  new  position differs from  the  position  when  the  power  was  turned  off  by more than 2 nm. (31)   POSITION  OF  WPT  HAS  CHANGED  - Either the latitude or the longitude of a waypoint used in a flight plan or the active waypoint has changed by more  than  0.33  minutes  as  a  result  of  updating  the database. (32)   POSITIONS   OF   OTHER   WAYPOINTS HAVE CHANGED - Appears when the above message POSITION    OF    WPT    HAS    CHANGED    would    be effective for more than 10 waypoints. (33)   PRESS  ALT  TO  SET  BARO   -  Appears when the approach mode is armed. (34)   PRESS GPS APR   FOR  NAV  - Appears after   the   NAV   flag   has   displayed   due   to   a   RAIM problem  while  the  unit  is  in  the  approach  mode.    By pressing the  GPS APR button, the unit will be able to restore    navigation    information    so    that    a    missed approach   may   be   conducted   based   on   navigation information provided by the KLN 90B. (35)   RAIM    NOT    AVAILABLE    APR    MODE INHIBITED   PREDICT   RAIM   ON   STA   5   -  Appears when integrity monitoring (RAIM) is predicted to not be available at either the FAF or the MAP.  The KLN 90B will  not  allow  the  unit  to  go  into  the  approach  active mode.      Turn   to   STA   5   page   to   perform   a   RAIM prediction. (36)   RAIM POSITION ERROR CROSS CHECK POSITION  -  The  unit  has  detected  a  problem with  one  of  the  satellites  and  the  position  cannot  be assured   to   be   within   IFR   limits.      Cross   check   the position  of  the  aircraft  with  other  means  of  navigation every 15 minutes to verify the position. (37)   RCVR     HARDWARE     ERROR_____     - Appears  when  the  unit  fails  a  specific  internal  test.   Record the numerical value. (38)   RECYCLE  POWER  TO  USE  CORRECT DATABASE DATA  -  The  date  entered  on  the  self  test page  is  before  the  database  effective  date  and  the date entered on the SET 2 page is after the database effective  date,  or  vice  versa.    Turn  the  unit  off  and back on. (39)   REDUNDANT   WPTS   IN   FPL   EDIT   EN ROUTE  WPTS  AS  NECESSARY  -  Appears  after  the pilot  inserts  an  approach  or  SID/STAR  procedure  in the  flight  plan.    Remove  those  waypoints  that  occur both in the en route and the SID/STAR sections. (40)   RS-232    DATA    ERROR   -   An   error   is detected  in  the  received  RS-232  data  such  as  from  a fuel management or air data system. (41)   RS-232    OUTPUT    ERROR    –     RS-232 output   fails   internal   test.      Do   not   use   moving   map displays. (42)   SATELLITE  COVERAGE  INADEQUATE FOR  NAV  -  Received  GPS  signals  are  not  adequate