(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 MENU switch on the face panel of the FSEU until the EXISTING FAULTS? message shows on the display.
(k)
Push the NO switch two times to show the GROUND TESTS? message on the display.
(l)
Push the YES switch to show the FLT DECK TEST? message on the display.
(m)
Push the YES switch on the face panel of the FSEU and make sure the indications that follow show momentarily at the locations that follow:
(n)
Make sure the EICAS message, FLAP/SLAT ELEC, does not show on the lower display.
NOTE: The EICAS status page must be on for the message to
____
show.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
J. Hydraulic Operation - Test
NOTE: Make sure you use a hydraulic source that operates at a pressure
____ of 3000 psi and supplies a flow rate of 22 gallons/minute. If you use a hydraulic source that does not operate to these specifications, the time it takes for the flaps and slats to move to the correct position will be more than the permitted time limit.
S 735-046
(1)
Do the test steps that follow for the usual hydraulic operation:
(a)
Make sure the flap control lever is in the zero (FLAPS UP) detent and the flaps and slats are in the fully retracted position.
(b)
Make sure the position selector switch for the alternate flaps/slats on the P3 panel is in the NORM position.
(c)
Make sure the L and R indicator needles for the flap position are in the tolerance band for the UP-unit position.
(d)
Do the BITE test on the FSEU-1 in the main equipment center.
(e)
Make sure the BITE test shows no faults.
(f)
Move the flap control lever to 1-unit detent.
(g)
Let the flaps move to the 1-unit position and the slats move to the intermediate position.
(h)
Make sure the flaps reach the 1-unit position in 5 to 7 seconds after the flap control lever is moved.
(i)
Make sure the L and R indicator needles for the flap position are in the tolerance band for the 1-unit position.
(j)
Do the BITE test on the FSEU-1.
(k)
Make sure the BITE test shows no faults.
(l)
Move the flap control lever to the 5, 15, 20, 25, and 30-unit detents, and then to the 25, 20, 15, 5, and 1-unit detents.
(m)
Let the flaps stop at each detent position and do a check as follows: 1) Make sure the L and R flap indicator needles for the flap
position are in the tolerance band for the unit position set on the flap control lever. 2) Do the BITE test on the FSEU-1 and make sure the BITE test shows no fault.
(n)
Move the flap control lever to the zero (FLAPS UP) detent, and let the flaps and slats move to the fully retracted position.
(o)
Make sure the L and R indicator needles for the flap position are in the tolerance band for the UP-unit position.
(p)
Move the flap control lever to the 30-unit detent.
(q)
Make sure the flaps and slats are at the fully extended position in less than 52 seconds after the flap control lever is moved.
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