412A STAB INTERACTIVE FD/LS CHECK 412A
Stabilator inspection and rigging
For a helicopter with BUCS deactivated,
BUCS FAIL indicators on the pilot and CPG
master caution/warning panels (fig. 29 and
236) are normally lit.
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 (fig. 234) 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 STABILATOR OPERATIONAL
Utility hydraulics are required for
STAB 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.
If any failure occurs, press pilot or CPG
collective RESET pushbutton prior to
proceeding to maintenance operational
1. Perform SYSTEMS POWERUP procedures in
accordance with paragraph 31.