TM 1-1520-238-T-7
11–177
11–23. DASE– MAINTENANCE OPERATIONAL CHECK (cont)
11–23
Task
Result
o. On CPG collective stick (fig. 11–112),
release BUCS select trigger switch.
p. On master caution/warning panels
(fig. 11–114), check that BUCS FAIL
indicators are not lighted.
If BUCS FAIL indicators are lighted, go to
paragraph 11–47.
If pilot BUCS FAIL indicator is lighted, go to
paragraph 11–48.
If CPG BUCS FAIL indicator is lighted, go to
paragraph 11–49.
Ensure all personnel keep clear of flight controls when BUCS TST switch
is held in PLT or CPG position. When performing BUCS self test,
automatic control motion occurs.
WARNING
During BUCS maintenance operational checks, cyclic sticks, collective
sticks, and directional pedals will move. Any restrictions of flight controls
may result in damage to the SPAD shear pins.
CAUTION
NOTE
Do not release BUCS TST switch until BUCS ON indicators are no longer
lighted. Early release of BUCS TST switch will cause BUCS FAIL to flash 5
times and test step must be repeated. BUCS ON indicators will be lighted
for approximately 20 seconds after BUCS TST switch is moved to PLT or
CPG position.
q. Perform all axis control sweep to ensure
freedom of controls. Center all controls
before performing next step.
r. On pilot ASE panel (fig. 11–109), hold
BUCS TST switch to PLT and perform the
following:
(1) On pilot center circuit breaker panel
(fig. 11–107), check that RTR BRK
circuit breaker is closed and remains
closed.
If RTR BRK circuit breaker does not stay closed, go
to paragraph 11–50.
(2) On master caution/warning panels,
press MASTER CAUTION indicator.
