27-41-03
SWITCHES ON THE CONTROL STAND ú ú 01 Page 402 ú Sep 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 034-008
(4) Disconnect the electrical connectors for the alternate stabilizer trim switch.
NOTE: The electrical connectors for the alternate stab trim
____ switches are under the control cabin floor by the speed brake LVDT connectors.
S 034-009
(5)
Remove the screws that hold the alternate stabilizer trim switch to the control stand.
S 024-010
(6)
Remove the alternate stabilizer trim switch.
TASK 27-41-03-424-011
3. Install the Alternate Stabilizer Trim Switch
____________________________________________
A. References
(1)
24-22-00/201, Electrical Power - Control
(2)
29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
B.
Access
(1)
Location Zones
211/212 Control Cabin
C.
Install the Alternate Stabilizer Trim Switch
S 424-012
(1)
Install the alternate stabilizer trim switch on the control stand with the screw and the washer (2 locations).
S 434-013
(2)
Connect the electrical connector for the alternate stabilizer trim switch.
NOTE: The electrical connectors for the alternate stab trim
____ switches are under the control cabin floor by the speed brake LVDT connectors.
S 434-014
(3) Connect the clamp (2 locations) to the control stand panel, P10, with the screw, nut, and washer.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH ALTERNATE STAB TRIM ú
27-41-03
SWITCHES ON THE CONTROL STAND ú ú 01 Page 403 ú Sep 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 414-015
(4)
Install the access panel for the left side of the control stand.
S 414-016
(5)
Install the left seal assembly.
D.
Alternate Stabilizer Trim Switch Test
S 864-017
(1) Supply electrical power (Ref 24-22-00).
S 864-018
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.
(2)
Supply power to the right and center hydraulic systems (Ref 29-11-00).
S 864-019
(3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the overhead panel, P11:
(a)
11B19, STAB TRIM ALT
(b)
11C12, STAB TRIM SHUTOFF LEFT
(c)
11C13, STAB TRIM SHUTOFF RIGHT
(d)
11H11 or 11C05, STAB TRIM CONT LEFT
(e)
11H20, STAB TRIM CONT RIGHT
S 864-020
(4)
Put the RIGHT STAB TRIM SHUTOFF valve switch on the P10 panel to the NORM position.
S 864-027
(5)
Put the CENTER STAB TRIM SHUTOFF valve switch on the P10 panel to the CUTOUT position.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH ALTERNATE STAB TRIM ú
27-41-03
SWITCHES ON THE CONTROL STAND ú ú 01 Page 404 ú Sep 20/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 864-028
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