(2)
Disconnect the electrical connector from the applicable solenoid: Connector D3188 - solenoid for autoslat computer #1 Connector D3190 - solenoid for autoslat computer #2
S 034-003
(3)
Hold the solenoid while you remove the 4 bolts.
(4)
Remove the solenoid, the o-rings, and the seals.
S 024-004
TASK 27-83-31-404-005
3. Autoslat Control Valve Solenoid Installation (Fig. 401)____________________________________________
A. References
(1)
AMM 27-83-21/401, Autoslat Control Valve
B.
Access
(1)
Location Zone
213 Right Ram Air Duct
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
AUTOSLAT CONTROL VALVE
SEE A
ELECTRICAL
CONNECTOR
SOLENOID
(COMPUTER NO. 1)
SEALS O-RINGS
FWD
SOLENOID
(COMPUTER NO. 2) ELECTRICAL CONNECTOR
BOLT
A
Autoslat Control Valve Solenoid Installation Figure 401
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A
737-300/400/500MAINTENANCE MANUAL
C. Procedure S 434-009
(1)
Install new o-rings and seals between the solenoid and the valve. S 424-010
(2)
Install the solenoid with the 4 bolts.
S 434-006
(3)
Connect the electrical connector to the solenoid.
S 714-007
(4)
Do this task: "Autoslat Control Valve Test" (AMM 27-83-21/401).
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A
737-300/400/500MAINTENANCE MANUAL
LEADING EDGE FLAP AND SLAT POSITION INDICATING SYSTEM -
_______________________________________________________ DESCRIPTION AND OPERATION
_________________________
1. General_______
A. A position indicating system provides visible indication of the position of the leading edge flaps and slats (Fig. 1). The system includes system indicator lights on the center instrument panel and individual flap and slat indicator lights on an annunciator panel in the aft overhead panel. This provides indication of normal operation on the center panel and enables the pilots to easily determine which flap or slat is not in the proper position when normal indications do not appear. The indicating system consists of reed switches in the bullnose, proximity sensors, a leading edge flap and slat position indication module, the pilots' indicator light panel, and the annunciator panel.
2. Proximity Sensors
A. Proximity sensors indicate the position of each leading edge flap and slat (Fig. 1). Each proximity sensor consists of an induction coil and an actuating bar. Each sensor coil is connected electrically to a transistorized switch card (switch) in the leading edge flap and slat position indication module (module). Each sensor coil is mounted on fixed leading edge structure and each actuating bar moves with a flap or slat. When the system is on, a constant current flow exists through each coil to ground. When an actuating bar is brought into position adjacent to the coil, the current flow is increased and a switch in the module is triggered. Two sensor coils are mounted adjacent to the inboard hinges of the leading edge flaps. The actuation bars are mounted on the inboard hinges. One sensor coil is installed adjacent to each leading edge slat inboard auxiliary track and an actuation bar is mounted on each inboard auxiliary track arm. At slats 1 thru 6, a sensor coil and actuation bar is mounted at the middle auxiliary track.
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