(1)
AMM 06-42-00/201, Empennage Access Panels and Doors
(2)
AMM 24-22-00/201, Electrical Power - Control
(3)
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
C.
Access
(1)
Location Zones 311/312 Area Aft of the Pressure Bulkhead to BS 1787.45
(2)
Access Panel
311AL Forward Stabilizer Compartment
D.
Prepare for the Removal
S 864-002
(1) Supply electrical power (AMM 24-22-00/201).
S 864-003
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. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
(2)
Supply power to the right and center hydraulic systems
(AMM 29-11-00/201).
S 864-004
(3)
Move the stabilizer to 4 units of trim, as shown on the stabilizer position indicators that are on the control stand panel, P10.
NOTE: The stabilizer ballscrew actuator can be removed at all
____ positions (if the stabilizer cannot be moved to the recommended position). But, if the actuator is not in the recommended position, the telescopic supports can hit the actuator.
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ALL ú ú 01.1 Page 401 ú Sep 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
STABILIZER BALLSCREW ACTUATOR
SEE A
A B
MOTOR CASE
DRAIN LINE
RETURN
LINE
SECONDARY
DRAIN LINE
MOTOR CASE BRAKE
SEE B BALLSCREW
ACTUATOR
BRAKE
RELEASE
LINE
A B
NOSE UP
HYDRAULIC LINE
1
MOTOR CASE DRAIN LINE
DRIVE HYDRAULIC MOTOR
(2 LOCATIONS)
NOSE DOWN
HYDRAULIC LINE
1
FWD
MOTOR CASE DRAIN LINE
STABILIZER BALLSCREW ACTUATOR
B A
1 CENTER HYDRAULIC SYSTEM SUPPLIES POWER TO THE LEFT SIDE RIGHT HYDRAULIC SYSTEM SUPPLIES POWER TO THE RIGHT SIDE
Stabilizer Trim Ballscrew Actuator Hydraulic Connections
Figure 401 (Sheet 1)
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ALL ú ú 01 Page 402 ú Sep 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
SECONDARY BRAKE
BALLSCREW ACTUATOR STABILIZER
MOTOR HYDRAULIC DRIVE DRAIN LINES BRAKE SEAL
MOTOR SEAL DRAIN LINES
DRAIN LINE MOTOR CASE
FWD
RETURN LINE RELEASE LINE BRAKE A-A
NOSE UP HYDRAULIC LINE
1
NOSE DOWN HYDRAULIC LINE
1
FWD
B-B
Stabilizer Trim Ballscrew Actuator Hydraulic Connections Figure 401 (Sheet 2)
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ALL 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 864-005
(4) Remove the pressure from the right and center hydraulic systems and ú reservoirs (AMM 29-11-00/201).
S 864-006
(5)
Put the C and R STAB TRIM SHUTOFF valve switches on the P10 panel to the CUTOUT position.
S 864-007
(6)
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11B19, STAB TRIM ALT (IF INSTALLED)
(b)
11C12, STAB TRIM SHUTOFF L
(c)
11C13, STAB TRIM SHUTOFF R
(d)
11H11 or 11C05, STAB TRIM CONT L
(e)
11H20, STAB TRIM CONT R
S 014-008
WARNING: STAY OFF THE SERVICE ACCESS DOOR, 311AL AND THE ELEVATOR
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