20-10-09
 ALL  ú ú 01 Page 409 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (3)  S 434-026Install hydraulic tubes with a minimum of force on the clamps or the tubes.
 (4)  S 224-027Where the tubes are held by clamps to an adjacent structure, make sure the tubes are clear of the adjacent structure. The minimum clearance is 0.10 inch. Where the tube is attached directly with a clamp to the structure, the clearance can be the thickness of the clamp.
 (5)  S 224-028Where tubes are not held by clamps to an adjacent structure, make sure all tubes are clear of the adjacent structure, equipment installations, and other items. The minimum clearance is 0.25 inch.
 (6)  S 224-029Make sure the tubes are clear of any mechanism that operates. The minimum clearance is 0.38 inch. This clearance can be 0.25 inch where the tubes are attached by clamps to adjacent structure and the tubes will not rub or touch the mechanism that operates.
 (7)  S 224-030If one tube goes across a tube or if two tubes are parallel, make sure there are sufficient clamps attached. The clearance must be 0.25 inch minimum or the thickness caused when two clamps are attached side-by-side.
 NOTE:____ You can add side-by-side clamps to get the necessary clearance.
 (8)  S 224-031To get the necessary clearances with the loop-type clamps, use BACS18AF3 or BACS18AF4 spacers to make the necessary height. On the U-type clamps, use BACS18AN spacers. Do not use NAS42 or NAS43 clamps on hydraulic tubes.
 NOTE:____ Do not use more than four spacers together. If you use more than four spacers, find the cause and correct the problem.
 (9)  S 224-033Make sure the tubes are clear of the control cables between the break points or the fairleads and the control cable linkage. The minimum clearance is 0.625 inch.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 20-10-09
 ALL  ú ú 01 Page 410 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 S 224-034
 (10) Make sure the minimum clearance between the tubes in the clampblocks (65B80254) and the channels on the clampblocks is 0.060 inch. If this clearance is less, correct the spacer tube length (NAS43003-) or correct the force on the tubes in the clampblock.
 TASK 20-10-09-224-035
 7.  Tubing Clamp Spacing____________________
 A. Procedure
 S 224-036
 (1)  Keep the space between the tubing clamps in the limits shown in Table 402, unless it is specified differently.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 20-10-09
 ALL  ú ú 01 Page 411 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 ~.......................................................................... | Normal Tube Clamp Maximum Spacing | | Table 402 | ............................................................................ | Tubing | | Usual | Special | | OD | | Clamp Spacing | Clamp Spacing | | (Inches) | Material | (Inches) | *[1] | ............................................................................ | 1/4 | Steel, Titanium | 16.0 | 12.0 | ............................................................................ | 3/8 | Steel, Titanium | 20.0 | 15.0 | ............................................................................ | 3/8 | Aluminum | 16.5 | 12.0 | ............................................................................ | 1/2 | Steel, Titanium | 23.0 | 17.0 | ............................................................................ | 1/2 | Aluminum | 19.0 | 14.0 | ............................................................................ | 5/8 | Steel, Titanium | 22.0 | 18.5 | ............................................................................ | 5/8 | Aluminum | 22.0 | 16.5 | ............................................................................ | 3/4 | Steel, Titanium | 27.5 | 20.5 | ............................................................................ | 3/4 | Aluminum | 24.0 | 18.0 | ............................................................................ | 1.0 | Steel, Titanium | 30.0 | 22.5 | ............................................................................ | 1.0 | Aluminum | 26.5 | 19.5 | ............................................................................ | 1 1/4 | Steel, Titanium | 31.5 | 23.5 | ............................................................................ | 1 1/4 | Aluminum | 28.5 | 21.0 | 2...............….................…........................…...............1
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 STANDARD PRACTICES - AIRFRAME(17)