DASE INTERACTIVE FD/LS CHECK
For a helicopter with backup control system
(BUCS) deactivated, make sure ASE BUCS
circuit breaker on pilot center circuit breaker
panel (fig.26) 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 NOGO 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
copilot/gunner (CPG) Master Caution and
Warning panels (fig.29 and 236) are
Control/switch position changes prompted by
FD/LS must be performed within 30 seconds
of prompt message, or a false NOGO
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 31. If the APU
is selected to provide power to the aircraft,
refer to paragraph 33.
1. Perform SYSTEMS POWERUP procedures in
accordance with paragraph 31.