TM 1-1510-224-10 commands  a  wings  level,  7  degrees  nose up   attitude.      Check    GA    annunciator    on EADI    illuminates.        Yaw    damper    should automatically    engage    and    YD    ENGAGE switch-annunciator    should    be    illuminated on  the  autopilot  controller  and  the  remote annunciators  above  the  EADI's  should  be illuminated. m. RUDDER  BOOST/YAW  CONTROL  TEST switch (pedestal extension)   TEST.    Check the   RUDDER   BOOST   annunciator   above the EADI's illuminates, yaw damper disengages,  YD   ENGAGE  switch-indicator on the autopilot controller extinguishes, and the    YD    ENGAGE    remote    annunciators above the EADI's flash 5 times. WARNING If   the   SBY   annunciator   on   the   flight director mode selector does not illuminate  within  10  seconds  after  the avionics  master  switch  is  turned  on, the autopilot has failed self-test and is considered inoperative and should not be used. CAUTION Do  not  force  the  elevator  trim  system beyond  the  limits  which  are  indicated on the ELEVATOR trim tab indicator. n. YD   ENGAGE   pushbutton   switch-indicator (autopilot  controller)  Depress  while  holding rudder    boost/yaw    control    test    switch    in TEST.  Yaw damper should not engage. o. RUDDER  BOOST/YAW  CONTROL  TEST switch RUDDER BOOST. Check RUDDER BOOST annunciator extinguished. p. Electric elevator trim Check. (1) ELEV TRIM switch On. (2) Pilot  and  copilot  trim  switches  Check operation. WARNING Operation  of  the  electric  trim  system should   occur   only   by   movement   of pairs  of  switches.    Any  movement  of the elevator trim wheel while depressing   only   one   switch   element indicates   a   trim   system   malfunction. The     electric     elevator     trim     control switch must then be turned OFF and flight conducted by operating    the    elevator    trim    wheel manually.  Do not use autopilot. (3) Pilot  and  copilot  trim  switches  Check individual  element  for  no  movement of  trim,  then  check  proper  operation of both elements. (4) Pilot   trim   switches   Check   that   pilot switches    override    copilot    switches while trimming in' opposite directions, and trim moves in direction commanded by pilot. (5) Pilot   or   copilot   trim   switches   Check trim  disconnects  while  activating  pilot or copilot trim disconnect switches. (6) ELEV   TRIM   switch    OFF    then    on (ELEC TRIM OFF annunciator extinguishes). «24.  ASE/ACS Perform BIT checks as required. a. UTIL on MFD Depress. b. SYSTEM BIT (R1) Depress. NOTE Before  conducting  the  INS  BIT  ensure mode  selector  is  in  ALIGN  and  align state  is  8  or  lower,  but  before  mode selector is placed in NAV. c. INS BIT Perform as follows: (1) INS   Select   on   EHSI   by   depressing INS/TCN on display controller. (2) INS  Select  on  single  needle  bearing source    selector    switch    on    display controller. (3) UTIL on MFD Depress. (4) SYSTEM BIT (R1) Depress. (5) INS BIT (R2) Depress. (6) NAV  on  flight  director  mode  selector Select. 8-6