TM 55-1520-240-23-9
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ADJUST DIFFERENTIAL AIRSPEED HOLD (DASH) ACTUATOR
(Continued)
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NOTE
Procedure is same to adjust upper or
lower DASH actuator. Adjust of upper
DASH actuator is shown here.
Upper actuator is controlled by No. 1
AFCS. Lower actuator is controlled
by No. 2 AFCS.
2.
To retract upper actuator (5), set AFCS line test
set switches as follows:
a.
Set power switches (6 and 7) to ON.
b.
Set METER SOURCE switch (8) to
ACTUATOR DRIVE.
c.
Set ACTUATOR DRIVE DASH switch (9) to
OFF.
d.
Set FEEDBACK MONITOR switch (10) to
DASH.
3.
Set ACTUATOR DRIVE DASH switch (9) to
RETR. Upper actuator (5) shall retract.
4.
Set ACTUATOR DRIVE DASH switch (9) to OFF.
5.
Set power switches (6 and 7) to OFF.
6.
Shut down electrical and hydraulic power.
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