E.  When the trailing edge flaps are retracted to between 10 and 1 units, seats will be retracted to the intermediate position. As the slats retract, the center instrument panel and annunciator panel full extend indicators will be extinguished and the transit indicators will be illuminated. When the slats reach the intermediate position, the transit indicators on both panels will be extinguished and the LE FLAPS EXT indicator on the center panel and SLATS EXT indicators on the annunciator panel will be illuminated.
F.  When the trailing edge flaps are retracted to the UP position, the leading edge flaps and slats are fully retracted. As the slats and flaps retract, the extend indicators will be extinguished and the transit indicators on the center instrument panel and annunciator panel will be illuminated. When the flaps and slats reach the retracted position, al1 indicator lights are extinguished. 
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F53237
525  Flap/Slat Indication Module (FSIM) Menu Hierarchy 
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LEADING EDGE FLAP AND SLAT POSITION INDICATING SYSTEM - TROUBLE SHOOTING
1.  General
A.  Green and amber LE position indicating lights are provided on the center instrument panel and LE flap and slat position annunciator panel to indicate position of the leading edge devices. One amber and two green indicator lights on the center instrument panel indicate collective position of all leading edge flaps and slats. The position annunciator panel has one amber and one or two green annunciator lights for each flap and slat. B. The amber indicator and annunciator lights indicate that the applicable flap or slat is in transit. The green lights indicate that the flap or slat is extended. No light illuminated indicates that the flap or slat is retracted.
C.  The green EXT annunciator light indicates that the leading edge flaps are fully extended and slats are in intermediate (mid) extend position. The green FULL EXT light indicates that the slats are in full extend position.
(1)  
LE flaps extend fully when trailing edge flaps are extended 1 unit or more.

(2)  
LE slats extend to intermediate position when trailing edge flaps are extended 1 to 10 units, and fully extend when trailing edge flaps are extended more than 10 units.

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D.  This trouble shooting procedure assumes that electrical wiring, indicator lights on center instrument panel and annunciator lights on position annunciator panel are good. Placing the master dim and test switch in TEST position will confirm the indicator lights. Pressing the TEST switch on the position indication module will confirm the annunciator lights. If the trouble shooting procedures does not isolate the trouble, a further check of the wiring will be required.
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