TM 55-1510-222-10 will be rejected by computer. 11.  INSERT/ADVANCE pushbutton - Press. Observe INSERT/ADVANCE and HOLD pushbutton annunciators  remain  illuminated.    North  position  error and  east  position  error  in  kilometers  will  appear  in  left and right data displays, respectively. 12.        If    WARN    annunciator    illuminates, proceed   to   step   13;   otherwise   proceed   to   step   9   in procedure: Extra Precision Geographic Present Position Check and Update. 13.  Data selector - DSRTK/STS. Observe  action  code  02  and  malfunction  code  49. This  indicates  radial  error  between  loaded  position  and INS   position   exceeds   62   kilometers.      Operator   must evaluate possibility that INS is in error or reference point position is incorrect.  It is possible to force INS to accept updated  position  by  setting  data  selector  to  UTM  POS and proceeding to step 10 of procedure: Extra Precision Geographic Present Position Check and Update. 14.  If   updating   is   to   be   rejected   -   Press HOLD pushbutton. Observe HOLD and INSERT/ADVANCE pushbutton   annunciators   extinguish.      INS   returns   to normal operation. (d)   Position update eradication: NOTE This   procedure   is   not   considered common.   Its  use  is  limited  to  those times where an operational error has resulted in an erroneous position fix. 1. Data selector - DSRTK/STS. 2. Key 1 - Press. Observe INSERT/ADVANCE pushbutton annunciator illuminates, 000001 appears in right data display. 3. INSERT/ADVANCE pushbutton - Press. Observe INSERT/ADVANCE pushbutton annunciator   extinguishes.      Within   30   seconds,   data displays return to normal with 0 (normal inertial mode) in last digit of right display.  AI will be set to approximately three times the number of hours in NAV. (13) Flight course changes. (a)   Manual flight plan change insertion: 1. WYPT CHG pushbutton - Press. Observe    WYPT     CHG     and     INSERT/ADVANCE pushbuttons illuminate. 2. Select new TO and FROM waypoints by pressing corresponding keys 3. WYPT CHG pushbutton - Press. Observe   new   waypoint   numbers   appear   in   TO- FROM data displays as keys are pressed. NOTE Selecting   zero   as   FROM   waypoint will     cause     desired     track     to     be, defined by computed present position    (inertial    present    position plus fixes) and TO waypoint. 4. INSERT/ADVANCE pushbutton - Press. Observe    WYPT     CHG     and     INSERT/ADVANCE pushbuttons extinguish. NOTE Waypoint zero always contains ramp coordinates  if  no  manual  flight  plan changes  are  made.    When  a  manual flight  plan  change  is  made,  present position   at   instant   of   insertion   is stored in waypoint zero. (14) After landing procedures: CAUTION • If   INS   will   be   unattended   for   an extended period, it should be shut down. • Do  not  leave  INS  operating  unless aircraft or ground power and cooling air are available to system. NOTE • The     INS     may     be     shut     down, downmoded    to    STBY    or    ALIGN mode, or operated in the navigation mode after landing.  The determining     factor     in     choosing course of action is expected length of time before the next takeoff. • Do  not  tow  or  taxi  aircraft  during INS 3-63