ASE/ACS BIT CHECKS
UTIL on MFD Depress.
SYSTEM BIT (R1) Depress.
Before conducting the INS BIT ensure
mode selector is in ALIGN and align state
8 or lower, but before mode selector is
placed in NAV.
INS BIT Perform as follows:
a. INS Select on EHSI by depressing INS/
TCN on display controller.
b. INS Select on single needle bearing
source selector switch on display control-
c. INS BIT (R2) Depress.
d. Check indications as follows:
(1) MFD INS BATT, INS FAIL, and
WAYPOINT ALERT CWA annuncia-
tors (3) illuminate.
(2) EHSI INS needle 30 degrees right
of lubber line and course deviation
bar displaced right followed by INS
needle centering and course devi-
ation bar displaced left. Check WPT
alert annunciator illuminated.
(3) Aircraft caution/advisory annunciator
panel Amber INS annunciator light
(4) INS mode controller Green READY
light and red BATT light illuminated.