TM 1–1520–238–T–1
4–5
4–2
DASE – INTERACTIVE FD/LS CHECK
4–2
Personnel Required:
(2)
References:
TM 1-1520-238-T-6
TM 1-1520-238-T-7
TM 1-1520-238-23
TM 9-1230-476-20-1
TM 9-1230-476-20-2
TM 11-1520-238-23-1
TM 11-1520-238-23-2
NOTE
For a helicopter with back–up control system
(BUCS) deactivated, make sure ASE BUCS
circuit breaker on pilot center circuit breaker
panel (fig.2–6) is open and locked. Digital
automatic stabilization equipment (DASE)
FD/LS is an interactive check which prompts
the operator to act. The DASE FD/LS check
is discontinued when an advisory message
28 VDC BUCS NO–GO is displayed.
Remaining DASE FD/LS check displays are
deactivated and do not occur.
For a helicopter with BUCS deactivated,
BUCS FAIL indicators on the pilot and
co–pilot/gunner (CPG) Master Caution and
Warning panels (fig.2–9 and 2–36) are
normally lit.
Control/switch position changes prompted by
FD/LS must be performed within 30 seconds
of prompt message, or a false NO–GO
message appears.
If FD/LS message on HOD does not change
within 2 seconds after responding to the
prompt (acknowledge), discontinue FD/LS
test; go to TM 1-1520-238-T-7 and perform
the DASE – OPERATIONAL CHECK.
Primary and utility hydraulics are required for
DASE – INTERACTIVE FD/LS CHECK.
If the AGPU is selected to provide power to
the aircraft, refer to paragraph 3–1. If the APU
is selected to provide power to the aircraft,
refer to paragraph 3–3.
1. Perform SYSTEMS – POWER–UP procedures in
accordance with paragraph 3–1.
