-
in severe weather
-
in high winds and jet blasts
-
by the age and condition of the fluid
-
by the method of application
(5)
The anti-icing code It is important that the flight crew get clear and precise information from persons who have carried out any de-/anti-icing procedures. In order to improve the quality of communication between the de-/anti-icing team and the flight crew, it is recommended that an anti-icing code be used. This will enable the flight crew to assess the "Holdover Time". This code must contain the following information :
-Type of Fluid
-Percentage of fluid to water (for type II and Type IV fluids only)
-Time de-/anti-icing application began (preferably local time) R - Complete name of the anti-icing fluid (so called "brand-name") for R Type II and Type IV fluids only (optional).
NOTE : The time referred to in the anti-icing codes must be the
____ starting time of the anti-icing procedure.
Two examples of anti-icing codes are given below :
R R AEA Type II/ 75/ 16.43 local xxxxx ----------- -------------- -----
R R R R | | | | | | | | | | | | | | | --------- Complete name of fluid | | | | | ----------------- Local Time of start of the application | | | ---------------- % of fluid/water by vol : 75% fluid/25% water | Type of fluid used
ISO Type I/ 06.30 UTC
---------- ---------
| | | | | | | | | | | - Universal coordinated Time of start of the application | ------ Type of fluid used
(6) Equipment
(a) Mobile equipment Truck mounted de-icing/anti-icing equipment must ideally be compatible for the application of Type I, Type II and Type IV fluids. Therefore the pump must be of the cavity or diaphragm type. Older types of centrifugal pumps cause degradation of fluids and their viscosity is reduced.
(b) Static facilities Purpose built de-icing/anti-icing facilities, available at some airports, consist of spray nozzles mounted on a gantry. The gantry moves at a predetermined speed over the aircraft or the aircraft moves under the gantry. The rate of fluid application can be computer-controlled, giving consistent and fast fluid application.
R R (c) Protective clothing The usual precautions generally taken with chemicals must be applied when using de-icing/anti-icing fluids. This includes wearing protective clothing, protective goggles and the application of suitable skin ointment on exposed skin.
ANTI-ICING PROTECTION - MAINTENANCE PRACTICES
_____________________________________________
TASK 12-31-11-660-001
Cold Weather Maintenance - Anti-Icing Protection
WARNING : DO NOT APPLY ANTI-ICING FLUID IN:
_______
-
THE AIR INTAKES AND EXHAUST OF THE ENGINES OR APU
-
THE AIR OUTLET OF THE OUTFLOW VALVE 10HL
-ALL OTHER AIR INTAKES OR OUTLETS.
CAUTION : DO NOT POINT HIGH-PRESSURE JETS:
_______
-
AT EQUIPMENT SUCH AS GEAR BOX SEALS, STEADY BEARINGS, ROTARY
ACTUATORS AND UNIVERSAL JOINTS,
-
AT ELECTRICAL COMPONENTS SUCH AS HARNESSES, PROXIMITY SENSORS AND
CONNECTORS.
THE IMPACT PRESSURE OF THE JETS MUST NOT BE MORE THAN 5 PSI (0.35
BAR). FOR FAIRINGS, THE IMPACT PRESSURE OF THE JETS MUST NOT BE MORE
THAN 1.5 PSI (0.1 BAR).
HIGH PRESSURE JETS CAN PUSH LIQUIDS INTO BEARINGS, JOINTS, BRAKES,
ELECTRICAL CONNECTORS AND OTHER SEALED COMPONENTS. LIQUIDS THAT GET
INTO THESE AREAS CAN CAUSE CORROSION, FREEZE DURING AIRCRAFT FLIGHT,
REMOVE NECESSARY LUBRICANTS OR START INCORRECT ELECTRICAL FUNCTIONS.
CAUTION : DO NOT USE JET EXHAUST TO REMOVE SNOW OR ICE FROM THE AIRFRAME. THE
_______ HIGH PRESSURE AND HIGH TEMPERATURE OF JET EXHAUST CAN CAUSE DAMAGE TO THE AIRCRAFT.
1. Reason for the Job
__________________
NOTE : These guidelines have been prepared using the Association of European
____
Airlines (AEA) recommendations :
Recommendations for anti-icing of aircraft on ground.
NOTE : The operators must use the procedures applicable to their individual 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320飛機維護手冊 AMM SERVICING 2(45)
