27-23-00
ALL ú ú 15 Page 107 ú Dec 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
RUDDER AND ELEVATOR HYDRAULIC SYSTEMS - ADJUSTMENT/TEST
_______________________________________________________
1. General
_______
A. This procedure contains two tasks. The first task is a system test for the rudder/elevator shutoff valves. The second task is a system test for the PCA monitor system.
TASK 27-23-00-735-001
2. Rudder/Elevator Shutoff Valves - System Test
____________________________________________
A. Equipment
(1)
Nose Gear Towing Lever Lockpin - A09003-1
B.
References
(1)
24-22-00/201, Electrical Power - Control
(2)
29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
(3)
32-00-15/201, Landing Gear Door Locks
(4)
32-00-20/201, Landing Gear Downlocks
C.
Access
(1)
Location Zones
211/212 Control Cabin
730/740 Main Landing Gear and Doors
D.
Prepare for the Test
S 865-002
(1)
Supply electrical power (Ref 24-22-00).
S 495-003
(2)
Move the towing lever on the metering valve module to the tow position and install the towing lever lockpin in the nose gear (Fig. 502).
S 215-043
(3)
Make sure the downlocks are installed on the nose and main landing gear (Ref 32-00-20).
S 495-005
WARNING: USE THE PROCEDURE IN AMM 32-00-15 TO INSTALL THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(4) Open the doors for the landing gear and install the door locks (Ref 32-00-15).
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ALL ú ú 01 Page 501 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
FLIGHT CONTROL
GEN FIELD MANUAL RESET
SHUTOFF SWITCHES SEE A
FIELD
FIELD FIELD
w w w
OFF
OFF OFF
w w
w L R APU FLT CONTROL SHUTOFF
ON ONON
www
OFF OFF OFF
aaa
LC R
GND USE ONLY
FLIGHT CONTROL SHUTOFF SWITCHES A
MANUAL
OVERRIDE
HYDRAULIC SHUTOFF LEVER AND
VALVE (LEFT SYSTEM) POSITION
INDICATOR
HYDRAULIC SHUTOFF SEE B
VALVE (RIGHT SYSTEM)
HYDRAULIC SHUTOFF VALVE
SEE B (CENTER SYSTEM)
SEE B
HYDRAULIC SHUTOFF VALVE B Rudder and Elevator Shutoff Valve Test Figure 501
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27-23-00
ALL ú ú 01 Page 502 ú Jun 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 865-006
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.
(5) Supply pressure to the applicable hydraulic system (Ref 29-11-00). NOTE: The shutoff valve for the right hydraulic system is located
____ in the wheel well for the right main gear.
The shutoff valves for the center and left systems are located in the wheel well for the left main gear.
NOSE GEAR TOWING LEVER LOCKPIN
TOWING LEVER (IN TOW POSITION)
TOWING LEVER SEE A
TOWING LEVER A
Nose Gear Steering Isolation Figure 502
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