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A
757 MAINTENANCE MANUAL
S 862-089
(6) Make sure the IRU is in operation (AMM 34-21-00/501).
S 862-021
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES
_______ WHEN HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO A PERSON OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
CAUTION:_______MAKE SURE THE FAN DUCT COWLING IS CLOSED. AN OPEN COWLING MAY HIT THE LE SLAT AS THE LE SLAT EXTEND AND CAUSE DAMAGE TO EQUIPMENT.
(7)
Pressurize the left hydraulic system (AMM 29-11-00/201) by use of one of the methods that follow:
(a)
Hydraulic Service Cart
(b)
Right ACMP augmenting left ACMP through PTU
(c)
Engine Driven Pump (EDP)
D.
Test the FSEU-1
S 862-022
(1)
Move the flap control lever to the 20-unit detent, and let the flaps extend to the 20-unit position and the slats extend to the intermediate position.
S 722-023
(2)
Move the flap control lever to the zero (FLAPS UP) detent, and let the flaps and slats retract fully.
(a)
Stop the procedure for 25 seconds, so that depressurization occurs.
S 862-024
(3)
Open this circuit breaker on the P11 panel and attach DO-NOT-CLOSE tag:
(a)
GUN 051;
11C18, FLAP SLAT SHUTOFF 1
(b)
GUN 006-050, 052-999;
11C17, FLAP SLAT SHUTOFF 1
(c)
GUN 001-005;
11H14, FLAP SLAT SHUTOFF 1
S 722-025
(4) Make sure this EICAS message, FLAP ISLN VAL, shows on the bottom EICAS for both maintenance and status page displays.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-51-01
ALL ú ú 12 Page 206 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 862-026
(5)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:
(a)
GUN 051;
11C18, FLAP SLAT SHUTOFF 1
(b)
GUN 006-050,052-999;
11C17, FLAP SLAT SHUTOFF 1
(c)
GUN 001-005;
11H14, FLAP SLAT SHUTOFF 1
S 742-082
(6)
Erase the EICAS message, FLAP ISLN VAL, from the ECS/MSG display.
S 722-049
(7)
Make sure the EICAS message, FLAP ISLN VAL, does not show on the status display.
S 742-083
(8)
AIRPLANES WITH -17 OR LOWER FSEUs; Push and release the BIT test switch on the FSEU-1.
(a)
Make sure the face panel on the FSEU shows no failure
indications.
(b)
Make sure the green test-complete light shows on the face panel for the end of test.
(c)
While BITE test is run, make sure the indications that follow come on momentarily at the given locations in the correct order:
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 LOAD RELIEF UPPER EICAS SCREEN FLAP/SLAT ELEC *[1] EICAS STATUS PAGE
*[1] THE EICAS STATUS PAGE MUST BE ON FOR A MESSAGE TO COME ON
S 742-050
(9)
AIRPLANES WITH -32 OR -37 FSEUs; Do a check for Past and Present Faults as follows:
(a)
Press BIT TEST button three times within 2 seconds on FSEU-1, and make sure there are no present fault indications. Green test-complete light denotes end of test.
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