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最近,好几个人都问到同样一个问题:
关于737轮舱管路颜色问题 各位前辈,我在737轮舱里看有些管路是绿色的,有些又是银灰色,那是管有什么特别意思吗?https://bbs.airacm.com/read/255483/ 你们是否也有同样的疑问呢?
这个波音其实专门有一个MT进行了说明:
BACKGROUND/背景
Production hydraulic tubing used on heritage Boeing airplanes (7X7) is manufactured from aluminum, Corrosion Resistant Steel (CRES), or titanium alloys. The finishes and colors visible on the tubing exterior can vary depending on material, date of manufacture, airplane model, and customer preference. It can be difficult to identify the material of the tube by visual inspection alone. 用于传统波音飞机(7X7)的液压管由铝、不锈钢(CRES)或钛合金制成。根据材料、制造日期、飞机型号和客户偏好的不同,管材外观上可见的饰面和颜色也不同。仅凭目视检查很难确定管子的材质。
The torque values for aluminum tubing and fittings are significantly less than the torque values for CRES or titanium tubing and fittings. 铝管和接头的扭矩值明显小于不锈钢或钛管和接头的扭矩值。
Some operators have reported experiencing hydraulic fluid leakage or damage to mating fittings from a hydraulic tube fitting that was tightened to the incorrect torque value because the material of the tube could not be correctly identified. 一些航空公司报告说,由于无法正确识别液压管接头的材料,导致液压管接头拧紧的扭矩值不正确,造成液压油渗漏或液压管接头损坏。
MAINTENANCE MANUAL ACTION/措施
The information in the Attachment tables applicable to each specific airplane model will be added to the following AMMs in the revisions shown: 附件表格中给出了适用于每种机型的信息,将被添加到相应AMM手册中: 737-100/200 AMM 20-10-51/401, 1 August 2009 revision 737-300/400/500 AMM 20-10-51/401, 25 March 2010 revision 737-600/700/800/900 AMM 20-10-51/401, 15 February 2010 revision 747 Classic AMM 20-11-05/401, 5 October 2009 revision 747-400 AMM 20-11-05/401, 15 March 2010 revision 757 AMM 20-10-09/401, 20 January 2010 revision 767 AMM 20-10-09/401, 22 April 2010 revision 777 AMM 20-10-09/401, 5 January 2010 revision
Attachment: HYDRAULIC TUBE FINISH / END FITTING INFORMATION 附件:液压管饰面/接头信息
BACKGROUND/背景
从厂家的MT可以看出,飞机上常见的液压管路及其接头材料有三种。在737NG飞机上:
另外,管路上除了漆层饰面外,还有标识。管路标识遵循MIL-STD-1247C标准(MARKING, FUNCTIONS, AND HAZARD DESIGNATIONS OF HOSE, PIPE, AND TUBE LINES FOR AIRCRAFT MISSILE, AND SPACE SYSTEMS):
↑MIL-STD-1247C
↑Identification Of Aircraft Fluid Lines
管路标识和飞机上很多标识一样,都是通过胶带粘贴到管路上去的:
下面是实物图:
燃油 /FUEL
红底黑字FUEL,白色带上有四角星符号。
液压油 /HYDRAULIC
兰黄底黑字HYDRAULIC,还有油液流动方向和所属系统功能。白色带上有实心/空心圆符号。实心圆为供油管,空心圆为回油管。
滑油 /LUBRICATION
黄底黑字LUBRICATION,白色带上有黑色交错正方形符号。
气源 /PNEUMATIC
橙兰底黑字PNEUMATIC,白色带上有黑色连续X交叉网格符号。
压缩空气 /COMPRESSED
橙底黑字COMPRESSED,白色带上有粗体斜杠符号。
引射水 /WATER
红灰红底黑字WATER,还有引射水的来源。白色带上有倒空心V字形符号。
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