TM 1–1520–238–T–1
Change 5
4–88.5
4–12A STAB – INTERACTIVE FD/LS CHECK 4–12A
(ACZ) (cont)
TASK
RESULT
e. On DEK, press and
release any key
except
ENTER/SPACE key
(ADC); or on the
If there are no system
failures, the following
message (prompt) appears:
ANY KEY FOR FD/LS
MENUS
CDU, SPC key
(ADD).
When a list of failures is
displayed, the list is scrolled
by pressing and releasing the
ENTER/ SPACE key on the
DEK (ADC) or SPC key on
the CDU (ADD). Scroll until
the following message
(prompt) appears:
ANY KEY FOR FD/LS
MENUS
f. Obtain maintenance
menu by pressing
and releasing any
DEK key except
ENTER SPACE or
SHIFT (ADC); or
any key on the CDU,
except SPC (ADD).
The FD/LS menus are
displayed on HOD one page
at time.
g. Press ND/NU switch
on stabilator manual
control (fig.2–24)
next to pilot
collective stick to NU
and then ND (only
enough to verify
upward/downward
movement of the
stabilator).
Observe the stabilator
position on the stabilator
position indicator (fig. 2–12)
and have an assistant
observe stabilator proper
movement. If stabilator does
not move in both directions or
moves only in one direction,
refer to TM 1-1520-238-T-7.
h. On DEK, press and
release ABC/1 and
DEF/2 keys (ADC).
On CDU, press and
release 1 and 2 keys
(ADD).
If CANNOT RUN WHILE IN
AIR appears on HOD, stop
FD/LS testing, refer to
TM 1-1520-238-T-6 to
troubleshoot squat relay,
squat switch and associated
wiring.
