TM 55-1510-219-10 2-84.  STANDBY MAGNETIC COMPASS. WARNING Inaccurate indications on the standby   magnetic   compass   will occur while windshield heat and/or   air   conditioning   is   being used. The  standby  magnetic  compass  is  located  below the overhead fuel management panel to the right of the windshield divider.  It may be used in the event of failure of  the  compass  system,  or  for  instrument  cross  check. Readings  should  be  taken  only  during  level  flight  since errors may be introduced by turning or acceleration.  A compass correction chart indicating deviation is located on the magnetic compass. 2-85.  MISCELLANEOUS INSTRUMENTS. a. Annunciator  Panels.    Three  annunciator  panels are  installed.    One  is  a  warning  panel  with  red  fault identification lights, and the others are caution/ advisory panels  with  yellow  and  green  identification  lights.    the warning    panel    is    mounted    near    the    center    of    the instrument  panel  below  the  glareshield  (fig.    228)  and one   caution/advisory   panel   is   located   on   the   center subpanel.  The mission annunciator panel is located on the  copilot's  sidewall.    Some  normal  flight  operations involve    indications    from    the    mission    control    panel, described  in  Chapter  4.    Illumination  of  a  red  warning light  signifies  the  existence  of  a  hazardous  condition requiring immediate corrective action.  A yellow caution light signifies a condition other than hazardous requiring pilot   attention.      A   green   advisory   light   indicates   a functional situation.  Table 2-6 provides a list of causes for  illumination  of  the  individual  annunciator  lights.    In frontal  view  both  panels  present  rows  of  small,  opaque rectangular   indicator   lights.      Word   printing   on   each indicator  identifies  the  monitored  function,  situation,  or fault   condition,   but   cannot   be   read   until   the   light   is illuminated.    The  bulbs  of  all  annunciator  panel  lights are   tested   by   activating   the   ANNUNCIATOR   TEST switch, located on the right side of the caution/ advisory panel.  The system is protected by two 5ampere circuit breakers  placarded  ANN  PWR  and  ANN  IND  on  the overhead    circuit    breaker    panel    (fig.        2-26).        The annunciator    system    lights    are    dimmed    when    the MASTER  PANEL  LIGHTS  switch  is  actuated  and  the pilot's  flight  instrument  lights  are  on.    The  lights  are automatically reset to maximum brightness if: (1) The main aircraft power (both DC generators) are OFF. (2) The   INST   INDIRECT   LIGHTS   switch   is ON. (3) The  MASTER  PANEL  LIGHTS  switch  is OFF. (4) The  MASTER  PANEL  LIGHTS  switch  is ON and the PILOT INST LIGHTS switch if OFF. b. Master Warning Light (Red). MASTER WARNING    light    is    located    on    each    side    of    the glareshield   (fig.      2-28).      Any   time   a   warning   light illuminates, the MASTER WARNING light will illuminate, and will remain illuminated until pressed.  If a new   fault   condition   occurs,   the   MASTER   WARNING light will be reactivated, and the applicable annunciator panel warning light will illuminate. c. Master   Caution   Light   (Yellow).      A   MASTER CAUTION light is located on each side of the glareshield (fig.    2-28).    Any  time  a  caution  light  illuminates,  the MASTER   CAUTION   will   illuminate,   and   will   remain illuminated   until   pressed.      If   a   new   fault   condition occurs, the MASTER CAUTION light will be reactivated, and  the  applicable  annunciator  panel  caution  light  will illuminate.  Annunciator Panels d. Pilot's  Clock.    One  manual  wind  8-day  clock  is mounted in the center of the pilot's control wheel (fig.  2- 16). e. Copilot's Clock.  A digital quartz chronometer is mounted in the center of the copilot's control wheel (fig. 2-16).      The   quartz   chronometer   is   a   five   function clock/timer    that    is    controlled    by    three    pushbutton switches located directly below the six digit liquid crystal display. (1) Mode   selection.      The   MODE   button   is pressed  to  select  the  desired  mode  of  operation.    The mode     annunciator     is     displayed     above     the     mode identifiers,    and    advances    to    indicate    each    of    the following modes:   LC Local Time   ZU Zulu or Greenwich Mean Time   FT Trip or Flight Timer   ET Elapsed Time   DC Down counter with Alarm (2) Local  time  mode  (LC).    Press  the  MODE button  to  advance  the  annunciator  to  LC.    To  set  the hour,  press  the  RST  button  once,  then  press  and  hold the  ADV  button  until  the  correct  hour  is  displayed.    To set minutes, press the RST button again, then press and hold the ADV button 2-71