TM 1-1520-218-10 3C-205 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 the 500 feet announcement if gear is not down. 9.   "Four hundred" at 400 feet AGL. 10.   "Check gear" will be announced immediately after the 400 feet announcement if gear is not down. 11.   "Three hundred" at 300 feet AGL. 12.   "Check gear" will be announced immediately after the 300 feet announcement if gear is not down. 13.   "Two hundred" at 200 feet AGL. 14.   "Check gear" will be announced immediately after the 200 feet announcement if gear is not down. 15.   "One hundred" at 100 feet AGL. 16.   "Check gear" will be announced immediately after the 100 feet announcement if gear is not down. 17.   "Minimum, minimum" will be announced at decision height. 18.   "Localizer" will be announced at 1.3 to 1.5 dots either side of center of beam.   Will be repeated three times at 4-second intervals. 19.   "Glideslope" will be announced 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"  will  be  announced at   excessive   deviation   from   altitude selected on the altitude alerter. 21.   "Check  trim"  will  be  announced  when trim    failure    has    occurred.        Will    be repeated     three     times     at    4-second intervals. 22.   "Autopilot"    will    be    announced    when autopilot has disconnected. 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.   GPAAS POWER 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. 4.   VA FAIL annunciator light – Extinguished. 5.   Radio altimeter  DH SET control  – Set to 200 feet. 6.   Radio altimeter   TEST switch   – Press and  hold.    "Minimum,  minimum"  will be  annunciated  once  followed  by  the illumination of the VA FAIL light. 7.   Radio altimeter TEST switch – Release. c.   GPAAS  Modes  of  Operation.    The GPAAS operates in the following modes of operation. (1)   Aural "Two Thousand" Advisory (Mode 1).         The     aural     advisory     "Two     Thousand" indicates that the aircraft is at a radio altitude of 2000 feet   AGL.      This   advisory   is   cancelled    when    valid information   from   the   radio   altimeter   is   lost,   during