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Advisory Circular AC00 2
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Advisory Circular AC00 2, Amendment 164 of Annex 1 to the Chicago Convention on International Civil Aviation. urges flight crew members ATC personnel and aircraft maintenance engineers to. comply with the language proficiency requirements and. Under Article 14 of the Civil Aviation Law of Mongolia 1999 Use of foreign language. in civil aviation the AC has been released in English version only in order to prevent. any mistranslation and misuse of the aviation safety related documents. This AC00 2 was developed based on NZ AC00 2 dated on 24 July 2007. 01 Apr 2016 2 CAA of Mongolia, Advisory Circular AC00 2. Table of Contents, Introduction 5, Storage conditions for aeronautical supplies 6. General storage conditions 6, Vapour Phase Inhibitor VPI 6. Protective oils fluids compounds 7, Desiccants 7, Storage Conditions for Specific Materials and Parts 10.
Lead acid batteries 11, Silver zinc batteries and silver cadmium batteries 12. Nickel cadmium batteries 12, Precautions 13, Precautions 15. Glass panels and windscreen assemblies 27, Sandwich type windows 27. Electrically heated windscreens 27, Storage conditions for aircraft engines 28. Internal protection American method 30, Internal protection British method 30.
Internal protection Special requirements 31, External Protection 31. General precautions 31, Fuel system 32, Lubrication systems 32. External treatment 32, Piston engines 35, Turbine engines 35. Storage of propellers 36, Short term storage propeller fully assembled 36. Long term storage or transportation of partially disassembled propellers 36. 01 Apr 2016 3 CAA of Mongolia, Advisory Circular AC00 2.
Short term storage on propeller stand or wall arbour 37. Propellers stored in manufacturers packing cases 37. Shelf life register 41, Special storage conditions 42. Stock recording 42, Issue documentation register 42. Goods in register 42, Technical directive register 42. 01 Apr 2016 4 CAA of Mongolia, Advisory Circular AC00 2. Introduction, This advisory circular is a ready reference handbook for individuals and organisations.
involved in all aspects of the purchase storage and distribution of all types of. aeronautical products, The advisory circular covers two areas. general and specific conditions of storage of a wide range of products. a typical stores system and the procedures needed to ensure satisfactory control. of the system, The advisory circular forms the basis for a system of storage of aeronautical products. that will include factors to be considered during the establishment and operation of a. reliable stores system The advisory circular also provides guidance for all personnel. engaged in stores activities, Other advisory circulars readers should refer to include. AC00 1 Acceptability of parts, AC43 1 Aircraft maintenance. AC145 1 Aircraft maintenance organisations, AC148 1 Aircraft manufacturing organisations.
01 Apr 2016 5 CAA of Mongolia, Advisory Circular AC00 2. Storage conditions for aeronautical supplies, The correct handling of materials especially the high strength aluminium alloys is of. importance to the integrity of a stores system Care is necessary during loading and. unloading and storage at the consignee s facility to ensure that the material is not. damaged by, scratching, excessive strain by bending. Damage to material from the above may change the mechanical properties of the. material Heavy forgings extrusions and castings should be carried and stored. individually ensuring that there is adequate support to maintain the material in Its. intended shape without strain, General storage conditions. Premises should be clean well ventilated and maintained at an even dry temperature. to minimise the effects of condensation In many instances the manufacturer will specify. the temperature and relative humidity in which the products should be stored To ensure. that these conditions are maintained within the specified range instruments are used. which measure the temperature and relative humidity of the store room. Temperature and relative humidity, When required the temperature and humidity should be checked at regular intervals by.
means of a hygrometer which measures the amount of humidity in the atmosphere The. wall type of hygrometer is normally used and consists of wet and dry bulbs The dry bulb. records the actual temperature and a comparison between this reading and that. registered by the wet bulb when read in conjunction with a table will indicate the. percentage of relative humidity present in the atmosphere. Protective materials for storage purposes, Vapour Phase Inhibitor VPI. This is a method of protection against corrosion often used for stored articles made of. ferrous metals, 01 Apr 2016 6 CAA of Mongolia, Advisory Circular AC00 2. VPI protects by its vapour which entirely covers any article in an enclosed space Direct. contact of the solid VPI with the metal is not required Although moisture and oxygen. are necessary for corrosion to take place VPI does not react with or remove either of. them but operates by inhibiting their corrosive action. The method most commonly used is treated paper or board the article to be protected. being wrapped in paper which has been treated with VPI or enclosed in a box made of. or lined with VPI treated board, Protection of parts by the VPI process should only be used where it is approved by the. manufacturer of the part, Protective oils fluids compounds. Where oils fluids or compounds are used as a temporary protection on metal articles it. should be ascertained that the material and the method of application is approved by. the manufacturer of the article Where protective oils fluids or compounds have been. used deterioration of such fluids or compounds by handling can be minimised by. wrapping in a non absorbent material such as polythene or waxed paper The life of. such temporary protective is increased by inhibiting drying out When parts or. components are stored for long periods they should be inspected at intervals to ensure. that the condition of the coating is satisfactory, Desiccants.
The desiccants most commonly used in the protection of stored parts or components. are silica gel and activated alumina Because of their hygroscopic nature these. desiccants are capable of absorbing moisture inside a packaging container or inside a. component thereby preventing corrosion, Desiccants should be inspected and renewed at specified periods or when an air tight. container has been opened It is important when inspecting or changing a desiccant that. the prescribed method is used to avoid the entry of moisture into a dry container. Tell tale desiccant is an indicating type of desiccant that is prepared with a chemical. which changes colour according to its moisture content Table 1 gives guidance on the. relative humidity of the surrounding air, 01 Apr 2016 7 CAA of Mongolia. Advisory Circular AC00 2, Moisture content of silica. Colour Surrounding relative humidity, Deep blue 0 5 0 2. Blue 10 5 5, Pale blue 20 7 5, Pinkish blue 30 12 0.
Bluish pink 40 20 2, Pink 50 27 0, Table 1 Desiccant colourings. Silica gel and activated alumina can be reactivated by a simple heat treatment process. The time and temperature required to effectively dry the desiccant should be verified. with the manufacturer but a general guide is, 135 C for at least two hours for silica gel. 250 C for four hours for activated alumina, The desiccant should then be placed in a sealed container until it has cooled after which. it should be completely reactivated, Racks and bins. Open racks allow a free circulation of air and are preferable when the nature of the stock. permits their use The painted metal type of bins is more suitable than the wooden type. since with the latter there is a risk of corrosion due to mould or dampness Polyethylene. rigid PVC corrugated plastics, or cardboard bins may also be used Many moulded plastics bins can also be fitted with.
removable dividers which will allow for the segregation of small parts whilst making. economic use of the space, Rotation of issue, Methods of storage should be such that batches of materials or parts are issued in strict. rotation This ensures that old stock is issued before new stock This is of particular. importance for perishable goods instruments and other components that have definite. storage limiting periods, Storage limiting period, The manufacturers of certain aircraft components impose storage limiting periods after. which time they will not guarantee the efficient functioning of the equipment On expiry. of the recommended storage periods the components should be withdrawn from stores. for checking or overhaul as recommended by the manufacturer. 01 Apr 2016 8 CAA of Mongolia, Advisory Circular AC00 2. The effective storage limiting periods of some equipment may be considerably reduced. if suitable conditions of storage are not provided The storage limiting periods quoted by. manufacturers are only acceptable if the prescribed conditions of storage are in. Flammable materials, All materials of a flammable nature should be kept in a store isolated from the main. buildings The precautions to be taken vary with the quantity and volatility of the. materials and such stores should comply with the requirements of all Mongolian. regulations including those requirements of non aviation authorities such as the. Department of Labour and the Environmental Risk Management Authority. Segregation of stock, Care should be taken to segregate materials which may have deleterious effects on.
other materials For example, carboys of acid should not be placed in a store where escaping fumes may affect. raw materials or finished parts, phenolic plastics should be segregated from cadmium plated steel parts to prevent. corrosion of the steel parts, magnesium alloys should not be stored in the vicinity of flammable materials. Packaging of stock, Stock should normally be packaged using the following materials and methods. Materials including but not limited to, Plastic film.
Jiffy bags, Lanolin grease impregnated cloth, Plastic film lined paper envelopes. Methods including but not limited to, oiling and placing in jars or plastic bags. individual packaging, Magnesium fittings should not normally be kept in sacks as the materials used in making. the sacks may cause corrosion of the fittings, 01 Apr 2016 9 CAA of Mongolia. Advisory Circular AC00 2, Materials in long lengths.
It is particularly important that long lengths of material such as extrusions tubes and. bars should generally be stored vertically Storing these items vertically reduces. problems caused by bow and handling damage Care should also be taken when placing. the material in the storage racks to prevent indentations and scratches especially when. handling the high strength aluminium alloys, Storage Conditions for Specific Materials and Parts. Ball and roller bearings, Ball and roller bearings should be stored in their original wrappings in dry clean. conditions with sufficient heating to prevent condensation caused by significant. temperature changes, Miniature steel balls and special high precision balls are immersed in instrument oil. contained in plastics phials with screw on caps, If the wrapping has become damaged or if it is removed for inspection of the bearings. the bearing should be soaked and swilled in white spirit to remove storage grease and or. Bearings with rubber seals should not be soaked, It is permissible to oscillate or turn the races slowly to ensure thorough cleaning but the.
bearing should not be spun in this unlubricated condition because the working surfaces. may become damaged A forced jet of white spirit may be used to advantage but an. efficient filter should be provided in the cleaning system. In certain cases it may be preferable to clean very small bearings with benzene but if. this fluid is used consideration should be given to the fire hazard and possible toxic. effects There are certain light white spirits which are suitable for use with very. small bearings and which eliminate some of the dangers associated with the use of. After cleaning the bearings should be inspected for signs of corrosion and then re. protected with a compound of mineral oil and lanolin and wrapped in grease proof paper. Many miniature bearings especially those used in instruments are susceptible to. brinelling when such bearings have become suspect or contaminated they should be. 01 Apr 2016 10 CAA of Mongolia, Advisory Circular AC00 2. In many instances orders for bearings are endorsed with a requirements that special. grease should be applied by the manufacturer If this grease is removed for any reason. it is essential that grease of the correct specification is re applied. Aircraft Batteries, Lead acid batteries, A charged battery which is to be stored for any length of time should be in the fully. charged condition Before storing the electrolyte levels should be checked and the. battery bench charged in accordance with manufacturer s instructions When fully. charged the battery should be stored in a cool dry and well ventilated store on an acid. resistant tray Batteries may also be stored in the dry uncharged state Additional points. AC00 2 Storage and Distribution of Aeronautical 01 April 2016 Supplies General Civil Aviation Authority Advisory Circulars contain information about standards practices and procedures that the Director has found to be an Acceptable Means of Compliance AMC with the associated rule

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