(i)  
Move the flap control lever to the 30-unit detent, and let the flaps and slats extend fully.

 (j)  
Move the flap control lever to the zero (FLAPS UP) detent, and let the flaps and slats retract fully.

 (k)  
Make sure the EICAS message, FLAP/SLAT ELEC, does not show on the status display.

 (l)  
Make sure the EICAS message FLAP/SLAT ELEC or FLAP/SLAT BITE, does not show on the ECS/MSG display.

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757 MAINTENANCE MANUAL
 E.  Test the FSEU-2
 S 862-051
 (1)  
AIRPLANES WITH -17 OR LOWER FSEUs; Push the arming switch for the alternate drive of the LE slats to arm the slat alternate drive (switch light on).

 (a)  
Push and release the BIT test switch on FSEU-2. 1) Make sure the face panel on the FSEU shows no failure indications.

 2)  Make sure the green test-complete light shows on the face panel for the end of test.

 (b)  
While the BITE test is run, make sure the indications show momentarily at the locations that follow:

 INDICATION__________  LOCATION
 TRAILING EDGE LIGHT P3 LEADING EDGE LIGHT P3 TE FLAP DISAGREE UPPER EICAS SCREEN TE FLAP ASYM UPPER EICAS SCREEN LE SLAT DISAGREE UPPER EICAS SCREEN LE SLAT ASYM UPPER EICAS SCREEN FLAP/SLAT ELEC *[1] EICAS STATUS PAGE
 *[1] THE EICAS STATUS PAGE MUST BE ON FOR MESSAGE TO COME ON
 S 722-031
 (2)  
AIRPLANES WITH -32 OR -37 FSEUs;
 Do a check for Past and Present Faults as follows:

 (a)  
Push the BIT TEST button three times in less than 2 seconds on FSEU-2. 1) Make sure the face panel on the FSEU shows no failure

 indications. 2) Make sure the green test-complete light shows on the face panel for the end of test.

 (b)  
Push and hold the BIT TEST button on FSEU-2. 1) Make sure all the FSEU-2 indication lights come on.

 (c)  
Release the BIT TEST button.

 (d)  
Push the arming switch for the alternate drive of the LE slat to arm the slat alternate drive (switch light on).

 (e)  
Push the BIT TEST button two times in less than 1 second and make sure that the indications that follow come on momentarily at the locations that follow:

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757
MAINTENANCE MANUAL

 INDICATION__________  LOCATION
 TRAILING EDGE LIGHT P3 LEADING EDGE LIGHT P3 TE FLAP DISAGREE UPPER EICAS SCREEN TE FLAP ASYM UPPER EICAS SCREEN LE SLAT DISAGREE UPPER EICAS SCREEN LE SLAT ASYM UPPER EICAS SCREEN FLAP/SLAT ELEC *[1] EICAS STATUS PAGE
 *[1] THE EICAS STATUS PAGE MUST BE ON FOR MESSAGE TO COME ON
 S 742-053
 (3)  
AIRPLANES WITH -40 FSEU'S; Do a check for Past and Present faults as follows:

 (a)  
Push the ON/OFF switch on the face panel of the FSEU to show the EXISTING FAULTS? message on the display.

 (b)  
Push the YES switch on the FSEU.

 (c)  
Make sure the NO FAULTS message shows on the display.

 (d)  
Push the MENU switch on the face panel of the FSEU to show the EXISTING FAULTS? message on the display.

 (e)  
Push the NO switch two times to show the GROUND TESTS? message on the display.

 (f)  
Push the YES switch to show the FLT DECK TEST? message on the display.

 (g)  
Push the NO switch to show the DISPLAY TEST? message on the display.

 (h)  
Push the YES switch.

 (i)  
Make sure all LED's on the face panel of the FSEU come on.

 (j)  
Push the arming switch, on the P3 panel, for the flap and slat alternate drives to arm the flap and slat alternate drives (switch light will come on).

 (k)  
Push the MENU switch on the face panel of the FSEU until the EXISTING FAULTS? message shows on the display.
　
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