TM 1-1520-238-MTF
2-51
Change 4
PROCEDURE
TROUBLESHOOTING
REFERENCE
AFTER STARTING APU (CONT)
(4) BUCS TST switch – CPG and
hold. BUCS ON caution light
should go out in approximately
20 seconds. Release switch
and wait 15 seconds to see if
the BUCS FAIL warning light
illuminates, if not proceed to
step (5).
(5) BUCS select trigger switch
(CPG) – Press. Verify
illumination of BUCS FAIL
warning light in both crew
stations.
(6) Collective – full down.
(7) RTR BK switch – As desired.
d. Collective friction – Check as
follows:
(1) Pilot and CPG friction – Set at
zero.
(2) With spring scale at head of
pilots collective, check for
breakaway of 4 to 6 pounds.
