Flap System Components - Interfaces Figure 008
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Flap System Interfaces - Data to other Systems
Figure 009
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(Ref. Fig. 009A)
**ON A/C 301-399,
(Ref. Fig. 009B)
**ON A/C ALL
(Ref. Fig. 010)
The SFCCs send and receive discrete and analog electrical signals to and
from the components of the flap system. Each SFCC has an ARINC 429
interface, which connects it to the other systems.
6. Component Description
_____________________
(Ref. Fig. 011)
A. Slat/Flap Control Lever
The slat/flap control lever has:
-an attachment plate
-
a housing
-
a lever assembly
-
a five-position gate.
The rectangular attachment plate has a slot for the movement of the lever assembly and connects to the center pedestal and the housing.
The housing contains:
-
the CSU
-
the lever assembly
-
a pinnion
-
a five-position gate.
The lever assembly has a spring-loaded plunger, a quadrant that connects to the pinnion and a knob with a collar. A pin at the lower end of the spring-loaded plunger engages in one of the notches of the five-position gate. A baulk above the second and forth notches of the five-position gate stops a one-movement change of the lever position (from the 0 position to the FULL position).
Flap System Interfaces - Data to other Systems
Figure 009A
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Flap System Interfaces - Data from other Systems Figure 010
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Flap/Slat Control Lever Figure 011
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When the collar is lifted (against the pressure of the spring-loaded plunger) the pin comes clear of the notch of the five-position gate. To move the lever past the baulk, the collar must be released.
As the lever moves from one position to the next the quadrant turns the pinnion. The pinnion (which has a splined shaft with one spline uncut to give a master spline) turns the rotary switch of the CSU.
B. Command Sensor Unit
(Ref. Fig. 012, 013)
The CSU is a sealed unit which changes the mechanical signals from the slat/flap control lever to electrical signals.
The CSU has:
-
a housing
-
a drive shaft
-four rotary switches
-a friction brake
-two electrical connectors.
The drive shaft has external splines, with one spline removed to give a
master spline. There are two zero-marks, one on the end of the drive
shaft and one on the housing. When the zero-marks are aligned, the CSU is
at mechanical zero. The drive shaft has a drive-gear which engages with
the input gears of the rotary switches.
When the drive shaft turns, the four rotary switches are operated at the
same time. Each rotary switch has a shaft with two sets of five tracks.
The tracks give the same switching patterns as the switches turn. Each
set of tracks has five detent patterns and four out-of-detent patterns.
The sliding contact connects two adjacent tracks to return for the detent
patterns. For the out-of-detent patterns, the sliding contact connects
only one of tracks 2, 3, 4 or 5 to return (Ref. Table 1).
The friction brake has a spring-loaded friction disc pack installed on
the drive shaft of the CSU.
The friction brake has two functions:
-
to hold the CSU in the last set position after a drive shaft failure
-
to apply friction to the drive shaft.
The rotary switches connect to two electrical connectors. Signals from one set of tracks on each switch go to connector A. Signals from the other set of tracks go to connector B.
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Command Sensor Unit Figure 012
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Command Sensor Unit - Schematic Figure 013 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM FLIGHT CONTROLS 飞行操纵4(10)
