TM 55-1510-220-10 (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 "I" 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   "O"   (normal   inertial mode) in last digit of right display.  AI will be set to approximately three times the number of hours in NAV. (14) 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  FROM  and  TO  waypoints by pressing corresponding keys. 3. 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. (15) After landing procedures: CAUTION If    INS    will    be    unattended    for    an extended   period,   it   should   be   shut down. CAUTION Do   not   leave   INS   operating   unless aircraft  or  ground  power  and  cooling air are available to system. NOTE The INS may be 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. CAUTION Do  not  shut  down  the  INS  until  the aircraft is parked.  Do not tow or taxi the   aircraft   until   the   INS   has   been shut down for at least 2 minutes.  This precaution is to prevent damage to the gyro's. NOTE Do not tow or taxi aircraft during INS alignment. Movement during alignment requires restarting alignment. (16) Transient stops. NOTE Action  to  be  taken  during  a  transient stop depends upon time available and on   availability   of   accurate   parking coordinates (latitude and longitude). Change 2   3-70