ELEVATOR OUTPUT TORQUE TUBE - INSPECTION/CECK
1. General
A. This data consists of illustrations and wear limits charts. There will be no procedure given in this section for gaining access to, or removing and replacing the components for inspection after wear. Refer to Component Removal/Installation for this information.
2, Elevator Output Torque Tube Wear Limits
G25972 G25975G44604
500 Elevator Output Torque Tube Wear Limits
May 01/99 Figure 601 (Sheet 1) 27-31-191
Page 601
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Elevator Output Torque Tube Wear Limits 500
27-31-191 Figure 601 (Sheet 2) May 15/72
Page 602
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 Elevator Output Torque Wear Limits
May 15/72 Figure 601 (Sheet 3) 27-31-191
Page 603
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
*[1] Replace worn bushing.
*[2] Obtain bushing. Bore hole to attain 0.0003 to 0.0022 inch interference fit (0.8129 inch maximum). Ream bushing to 0.6245/0.6255 inch diameter.
*[3] Bore hole oversize to within 0.4521 to 0.4526 inch. Use BACB30LE7U46X (size 0.4521 to 0.4526 inch) bolt.
*[4] Bore hole oversize to within 0.4677 to 0.4682 inch. Use BACB30LE7U46Y (size 0.4677 to 0.4682 inch) bolt.
Elevator Output Torque Tube Wear Limits 500
27-31-191 Figure 601 (Sheet 4) May 15/72
Page 604
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
ISOLATION VALVES HYDRAULIC MODULE - REMOVAL/INSTALLATION
1. General
A. The isolation valves hydraulic module consists of a housing and six manual isolation valves. The following procedure provides removal and installation instructions for the module. The valves may be removed and installed individually per 27-31-211.
2. Equipment and Materials
A. Skydrol Assembly Lube - MCS 352 or Hydraulic Fluid, Fire Resistant - BMS 3-11
3. Prepare for Removal
A. Remove elevator systems A and B hydraulic power. Refer to 27-31-0, Elevator and Tab Control System - Maintenance Practices.
B. Open aft compartment access door 3701. Refer to Chapter 12, Access Doors and Panels.
4. Remove Isolation Valves Hydraulic Module
A. Remove eight hydraulic lines from isolation valves module. Cap and plug all open ports and hydraulic lines. (See figure 401.)
CAUTION: RELEASE HYDRAULIC LINE CONNECTORS SLOWLY AND ALLOW POSSIBLE TRAPPED PRESSURE TO RELIEVE BEFORE COMPLETELY DISCONNECTING HYDRAULIC LINE. BE PREPARED TO CATCH SPILLED HYDRAULIC FLUID.
B. Remove bolts, washers, nuts and spacer securing module to structure. Remove module from airplane.
C. Remove locking bar from module as follows:
(1)
Remove cotter pin from upper mounting bolt.
(2)
Remove upper and lower mounting bolts, washers and nut.
(3)
Withdraw locking bar from module.
508
Feb 15/73 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-31-201 Page 401
G25977
Isolation Valves Hydraulic Module Installation 502
27-31-201 Figure 401 Aug 15/72
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
5. Install Isolation Valves Hydraulic Module
A. Remove elevator systems A and B hydraulic power. Refer to 27-31-0.
B. Install locking bar on module as follows (see figure 401):
(1)
Ensure all valves are positioned OPEN.
(2)
Position locking bar on module and install lower mounting bolt with head aft. Install washer under bolt head and either side of module.
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