TM 1-1510-225-10 2-118 1.  Roll Pointer 2.  Horizon Line 3.  Caging / Pitch Trim Knob 4.  Trim Pointer 5.  Pitch Trim Scale 6.  Miniature Aircraft 7.  Drum 8.  Power Warning Flag 9.  Roll Index Figure 2-40.  Standby Attitude Indicator  F3   OSA Table 2-12.  Standby Attitude Indicator Control / Functions  F3  OSA NO. FUNCTION 1 Indicates vertical in any roll attitude. 2 Indicates earth's horizon relative to aircraft pitch attitude. 3 Pulled to cage the indicator and rotated to adjust the miniature aircraft attitude. 4 Pointer indicates trim displacement. 5 Measures displacement of miniature aircraft. 6 Represents aircraft nose and wings. Indicates roll and pitch attitude relative to the horizon. Adjustable through pitch knob for varying pitch attitudes. 7 Directly linked to the spin motor to provide direct reading of aircraft movement in roll and pitch.  Marked each 5° in pitch.  Black area of drum indicates dive; blue or gray area indicates climb. 8 In view, indicates power off, caged condition, open motor winding, or loss of power.  Retracted, normal operation. 9 Rotates   with   aircraft   to   provide   measurement   of   angular   displacement   by   the   roll   pointer   during maneuvers. (7)  Pitch  Trim  Pointer.    Indicates  amount  of vertical   trim   displacement   applied   to   the   miniature aircraft. (8)  Pitch  Trim  Scale.    Provides  a  means  of measuring  the  amount  of  vertical  trim  displacement applied to the miniature aircraft. (9)  Miniature Symbolic Aircraft. The relationship    between    the    fixed    miniature    aircraft symbol    and    the    movable    attitude    sphere    display aircraft pitch and roll attitudes. (10)   Drum.  The drum is directly linked to  the gyro   to   provide   a   direct   measurement   of   aircraft movement around the pitch and roll axis. (11)   Power  Warning  Flag.    Presence  of  the power  warning  flag  indicates  no  power  to  the  unit,  a caged condition, or open gyro motor winding. e.   Standby Attitude Indicator Backup Battery Power System Controls, Indicators, and Functions.   R The controls and indicators for the standby attitude indicator backup battery power system are located on the    audio    control    panel.        Refer    to    Figure    3A-1.