标题: GROUND DEICING AND ANTI-ICING PROGRAM地面除防冰大纲 [打印本页] 作者: 航空 时间: 2010-10-20 11:04:53 标题: GROUND DEICING AND ANTI-ICING PROGRAM地面除防冰大纲
作者: 航空 时间: 2010-10-20 11:06:13
Subject: GROUND DEICING AND ANTI-ICING PROGRAM
Date: 12/20/04
Initiated By: AFS-220
AC No: 120-60B
Change:
1. PURPOSE. This advisory circular (AC) has been updated to reflect current industry practices and to standardize the application process and training programs associated with ground deicing/anti-icing. It provides an industry-wide standard means for obtaining approval of a Ground Deicing /Anti-Icing Program in accordance with Title 14 of the Code of Federal Regulations (14 CFR) part 121, section 121.629. In addition, it provides a means acceptable to the Administrator for a certificate holder to deice/anti-ice aircraft using another certificate holder’s personnel and procedures or contract personnel who have been trained by the other certificate holder.
2. CANCELLATION. AC 120-60A, Ground Deicing and Ant-Icing Program, dated August 30, 2004, is canceled.
3. DEFINITIONS.
a. Anti-icing. A procedure used to provide protection against the formation of frost or ice and accumulation of snow or slush on clean surfaces of the aircraft for a limited period of time (holdover time). Anti-icing fluids are normally applied unheated on clean aircraft surfaces, but may be applied heated, and include:
(1) SAE Type I fluid.
(2) Concentrates or mixtures of water and SAE Type I fluid.
(3) Concentrates or mixtures of water and SAE Type II fluid.
(4) Concentrates of SAE Type III fluid.
(5) Concentrates or mixtures of water and SAE Type IV fluid.
b. Deicing. A procedure used to remove frost, ice, slush, or snow from the aircraft in order to provide clean surfaces. The procedure can be accomplished using fluids, infrared energy,
AC 120-60B 12/20/04
mechanical means, or by heating the aircraft. Deicing fluid is usually applied heated to assure maximum deicing efficiency and includes:
(1) Heated water.
(2) SAE Type I fluid.
(3) Heated concentrates or mixtures of water and SAE Type I fluid.
(4) Heated concentrates or mixtures of water and SAE Type II fluid.
(5) Heated concentrates or mixtures of water and SAE Type III fluid.
(6) Heated concentrates or mixtures of water and SAE Type IV fluid.
c. Frozen Contaminants. As used in this AC, frozen contaminants include light freezing rain, freezing rain, freezing drizzle, frost, ice, ice pellets, snow, snow grains, and slush.
d. Holdover Time (HOT). The estimated time that deicing/anti-icing fluid will prevent the formation of frost or ice and the accumulation of snow on the critical surfaces of an aircraft. HOT begins when the final application of deicing/anti-icing fluid commences and expires when the deicing/anti-icing fluid loses its effectiveness.
e. Pretakeoff Check. A check of the aircraft’s wings or representative aircraft surfaces for frozen contaminants. This check is conducted within the aircraft’s HOT and may be made by observing representative surfaces from the flight deck, cabin, or outside the aircraft, depending on the type of aircraft and operator’s FAA-approved program.
f. Pretakeoff Contamination Check. A check (conducted after the aircraft’s HOT has been exceeded) to ensure the aircraft’s wings, control surfaces, and other critical surfaces, as defined in the certificate holder’s program, are free of all frozen contaminants. This check must be completed within 5 minutes before beginning takeoff and from outside the aircraft, unless the certificate holder’s FAA-approved program specifies otherwise .
g. Post Deicing Check. A check, after deicing application, to ensure all aircraft surfaces are free of frozen contaminants.