(2)
Access Panels
561/661CB Aileron Power Limit
C.
Prepare for Removal
S 862-004
(1)
Supply electrical power (Ref 24-22-00).
S 862-047
(2)
Remove the pressure from the left, right, and center hydraulic systems (Ref 29-11-00).
S 012-048
(3)
Open access panel 561CB (for the left wing) or 661CB (for the right wing) (Ref 06-44-00).
D.
Remove the Filter (Fig. 201)
S 862-049
(1)
Lift the aileron to a position that is one-half of full travel.
S 032-050
(2)
Disconnect the hydraulic pressure line (9) from the PCA (4) and do this step:
(a)
Install a cap on the hydraulic line.
S 032-051
(3)
Remove these components:
(a)
The union (18)
(b)
The packing (19).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-11-20
ALL ú ú 01 Page 214 ú Jun 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 022-052
(4) Remove the filter (20).
TASK 27-11-20-422-065
5. Aileron PCA Filter - Installation_________________________________
A. Consumable Materials
(1)
D00054 Lubricant, Hydraulic System O-rings, Backup Rings, Fittings -MCS 352
B.
References
(1)
06-44-00/201, Wing Access Doors and Panels
(2)
24-22-00/201, Electrical Power - Control
(3)
29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
C.
Access
(1)
Location Zones
561/661 Rear Spar to Trailing Edge
(2)
Access Panels
561/661CB Aileron Power Limit
D.
Install the Filter (Fig. 201)
S 642-053
(1)
Apply lubricant to the union (18) and the packing (19) before installation.
S 432-054
(2)
Install these components:
(a)
The filter (20) in the PCA pressure port
(b)
The packing (19) and the union (18).
S 432-055
(3)
Connect the hydraulic line (9) to the PCA (4).
E.
Aileron PCA . Test
S 862-056
(1)
Make sure these circuit breakers on the overhead panel, P11, are closed:
(a)
EICAS (6 locations)
S 862-057
(2) Push the STATUS switch on the pilot's display select panel, P9, to show the aileron position indicator on the bottom EICAS display.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-11-20
ALL ú ú 01 Page 215 ú Jun 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 862-005
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 PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR
WHEN HYDRAULIC POWER IS SUPPLIED.
(3)
Supply pressure to the left, right, and center hydraulic systems (Ref 29-11-00).
S 212-058
(4)
Turn the control wheel to its full counterclockwise position and do these checks:
(a)
Make sure the left aileron moves up and the right aileron moves down.
(b)
Make sure the ailerons move smoothly through their full travel range.
S 212-059
(5)
Turn the control wheel to its full clockwise position and do these checks:
(a)
Make sure the left aileron moves down and the right aileron moves up.
(b)
Make sure the ailerons move smoothly through their full travel range.
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