TM 1-1510-218-10 3A-46 started,    voice    annunciation    of    the    higher    priority message   shall   be   announced   after   a   lower   priority message   in   progress   at   the   end   of   the   message segment.  It will not stop in the middle of a word.  On messages  that  are  repeated  three  times  at  4-second intervals,  the  priority  list  will  be  scanned  for  higher priority  messages  and  will  insert  them  in  the  interval between  the  messages.    The  messages  provided  by the system are listed in descending order of priority as follows. 1.   "Two thousand" at 2000 feet AGL. 2.   "One thousand" at 1000 feet AGL. 3.   "Nine hundred" at 900 feet AGL. 4.   "Eight hundred" at 800 feet AGL. 5.   "Seven hundred" at 700 feet AGL. 6.   "Six hundred" at 600 feet AGL. 7.   "Five hundred" at 500 feet AGL. 8.   "Check gear" will be announced immediately after 500-foot announcement if gear is not down. 9.   "Four hundred" at 400 feet AGL. 10.   "Check gear" will be announced immediately after 400-foot announcement if gear is not down. 11.   "Three hundred" at 300 feet AGL. 12.   "Check gear" will be announced immediately after 300-foot announcement if gear is not down. 13.   "Two hundred" at 200 feet AGL. 14.   "Check gear" will be announced immediately after 200-foot announcement if gear is not down. 15.   "One hundred" at 100 feet AGL. 16.   “Check gear" will be announced immediately after 100-foot announcement if gear is not down. 17.   "Minimum, minimum" at decision height. 18.   "Localizer"   at   1.3   to   1.5   dots   either side   of   center   of   beam.      Will   be repeated    three    times    at    4-second intervals. 19.   "Glideslope"  at  1.3  to  1.5  dots  above or   below   center   of   beam.      Will   be repeated    three    times    at    4-second intervals. 20.   "Altitude, altitude" at excessive deviation from altitude selected on the altitude alerter. 21.   "Check   trim"   when   trim   failure   has occurred.        Will    be    repeated    three times at 4-second intervals. 22.   "Autopilot" when autopilot has disconnected. The highest priority message will be announced first.      If   a   higher   priority   item   is   received   after   a message  has  been  started,  voice  annunciation  of  the higher priority message shall immediately override the lower  priority  message  in  progress  at  the  end  of  the message segment.  It will not stop in the middle of a word.  On messages that are repeated three times at 4-second  intervals,  the  priority  list  will be scanned for higher   priority   messages.      If   found,   they   will   be inserted into the interval between the messages. b.  Normal Operation. (1)   Turn-On    Procedure.        The    GPAAS    is operable   when   the   following   conditions   have   been met. 1.   Battery switch – ON. 2.   AVIONICS MASTER switch – ON. 3.   VOICE ADVSR circuit breaker  – SET. 4.   RADIO ALTM circuit breaker – SET. 5.   VA FAIL annunciator light – Extinguished.   (2)   GPAAS Ground Check. 1.   GPAAS voice advisory  VOL control  – Full clockwise. 2.   VOICE OFF switch-indicator – Extinguished. 3.   Audio   control   panel   –   Set   listening audio level.