(2)  
12-14-01/301, Potable Water System

 (3)  
12-17-01/301, Waste Tank

 (4)  
71-00-00/201, Power Plant

 B.  Equipment
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-33-01
 ALL  ú ú 02 Page 302 ú Jan 28/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 WARNING: MAKE SURE YOU USE THE CORRECT EQUIPMENT FOR THE FLUID YOU USE.
_______ MECHANICAL OR EQUIPMENT SHEAR OF THE FLUID CAN OCCUR IF THE CORRECT EQUIPMENT IS NOT USED. IF THIS OCCURS, THE VISCOSITY OF MANY TYPE II AND TYPE IV FLUIDS WILL DECREASE AND, THUS, THE APPROXIMATE HOLDOVER TIME. MAKE SURE YOU REFER TO THE MANUFACTURER'S GUIDELINES FOR THE FLUID THAT YOU USE.
 (1)  Ground equipment that is correct and satisfactory to use with the materials that follow:
 (a)  
Deicing/Anti-icing Truck

 (b)  
Boomtruck or Cherry-Picker

 (c)  
Water

 (d)  
Type I, II, or IV Deicing Fluid

 (e)  
Type I, II, or IV Anti-icing Fluid

 (f)  
Hot Air Source

 C. Consumable Materials
 NOTE: The applicable fluids which obey the Boeing document D6-17487,
____ "Certification Test of Airplane Maintenance Material" and conform to any of the following specifications, are acceptable fluids:
 (1)  Type I (newtonian) fluids:
 (a)  
G02301 Fluid SAE AMS 1424 latest revision

 (b)  
G00072 MIL-A-8243D Types 1 and 2

 NOTE: MIL-A-8243D Type 1 fluid is acceptable in a 50/50
____ fluid/water concentration. MIL-A-8243D Type 2 fluid is acceptable in any concentration. There are no holdover time guidelines for MIL-A-8243D fluids.
 (2)  Type II and Type IV (non-newtonian) fluids:
 (a)  G02301 Fluid SAE AMS 1428 latest revision
 D. Guidelines
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-33-01
 ALL  ú ú 01 Page 303 ú May 28/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 S 663-103
 CAUTION: THE REPEATED APPLICATION OF TYPE II AND TYPE IV
_______ DEICING/ANTI-ICING FLUIDS, WITHOUT THE SUBSEQUENT APPLICATION OF TYPE I DEICING/ANTI-ICING FLUID OR HOT WATER, MAY CAUSE RESIDUE TO COLLECT IN AERODYNAMICALLY QUIET AREAS. THIS RESIDUE MAY REHYDRATE AND FREEZE UNDER CERTAIN TEMPERATURE, HIGH HUMIDITY AND/OR RAIN CONDITIONS. THIS RESIDUE MAY BLOCK OR IMPEDE CRITICAL FLIGHT CONTROL SYSTEMS. THIS RESIDUE MAY REQUIRE REMOVAL.
 (1)  General
 (a)  
Many conditions can have an effect on which procedure you use to remove ice, snow, or frost or to make sure it does not collect and become attached to the airplane surfaces. Each operator must look at the local weather conditions. If it is possible, use the procedures that were used before with the same conditions. A general guideline is, Type II and Type IV fluids give a longer holdover time than Type I fluids. Use Type II and Type IV fluids to decrease the risk that ice, snow, or frost will collect on the airplane during a long taxi. For example, Fig. 301 gives the general guidelines to help you find the correct ice, snow, or frost removal procedure. This gives you the same procedure you will find when you use the full guidelines in this procedure.

 (b)  
Use a hot mixture of water and the Type I, Type II , or Type IV deicing/anti-icing fluids when you do the one-step ice removal/anti-icing procedure. The three items below will have an effect on the quantity of water mixed with the fluid and the temperature you use: 1) The weather conditions 2) The holdover protection that is necessary 3) The condition of the airplane.

 (c)  
It is necessary to have sufficient fluid temperature and flow rate to flush the ice and snow from the airplane surfaces when it collects there. More ice, snow or frost will not collect on the airplane surfaces where there is remaining fluid. The mixture and type of fluid used will have an effect on the holdover time. The weather conditions can make it necessary to apply the fluid/water mixture again. This will be necessary to remove the frozen fluid that collected since the fluid/water mixture was applied last. This is also done to increase the protection time. You can use cold water to remove snow if the conditions that follow occur: 1) There is only snow on the airplane
　
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 SERVICING 2(84)