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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. to note are as follows, Every four to six weeks depending on manufacturer s instructions the battery. should be removed from storage and recharged until voltage and specific gravity. readings cease to rise, Damage to the battery will occur if it is allowed to stand idle beyond the period for. charging specified by the manufacturer, Regardless of periodic check charges the battery should be given a complete.
charge and capacity check immediately before being put into service. For new batteries a complete capacity test to the manufacturer s instructions. should be made every six months, For a battery that has been in service a complete capacity test to the. manufacturer s instructions should be made every three months. An insulation resistance test should be carried out to the manufacturer s. instructions every 12 months or earlier if a leak is suspected. If the conditions mentioned in the previous paragraphs are observed a battery may. remain in storage up to 18 months, A battery should not be allowed to stand in a discharged condition. Battery electrolyte temperatures should not exceed 48 8 C. Records of maintenance shall be maintained, Trickle charging at low rates is not recommended as damage will occur if idle batteries. are subjected to this form of charging,01 Apr 2016 11 CAA of Mongolia. Advisory Circular AC00 2, Silver zinc batteries and silver cadmium batteries.
These batteries should be stored in clean dry cool and well ventilated surroundings. not exposed to direct sunlight or stored near radiators Additional points to note are as. New batteries will normally be supplied in the dry condition with the electrolyte. contained in polythene ampoules and should be stored in their original packaging. together with the related ampoules of electrolyte For storage periods of more than. two years special instructions should be requested from the manufacturer. Filled and formed batteries required for use at very short notice may be stored in. the charged condition Manufacturers normally recommend that such batteries. should be discharged and recharged every four to six weeks The manufacturer s. schedule of maintenance should be applied to batteries stored in the charged. condition and all maintenance shall be recorded, Batteries to be stored out of use for protracted periods should be discharged at the. 40 hour rate until the voltage level measured while discharging falls below the. equivalent of 0 8 volt per cell, Before storing batteries the electrolyte level should be adjusted to near the. maximum specified by topping up using a potassium hydroxide solution of 1 300. The need for care in handling potassium hydroxide because of its caustic content. is stressed After topping up or filling the top of the batteries should be cleaned. and the connections and terminals lightly smeared with white petroleum jelly In no. circumstances should sulphuric acid or acid contaminated utensils be used in close. proximity to silver zinc or silver cadmium batteries. Nickel cadmium batteries, This type of battery can be stored for long periods without damage in any state of. charge provided the storage place is clean and dry and the battery is correctly filled. Additional points to note are as follows, For the battery to be ready for use in the shortest possible time it should be fully. charged correctly topped up and then discharged at normal rate for a period of. one hour before storage,01 Apr 2016 12 CAA of Mongolia.
Advisory Circular AC00 2, The battery should be cleaned and dried and the terminals and connectors lightly. smeared with pure mineral jelly, The battery should be inspected at intervals of six to nine months and topped up if. Before going into service the battery should be given a double charge and capacity. check as recommended by the manufacturer of the particular type of battery. The battery should be stored on a shelf or rack protected from dirt or dust and. where metallic objects such as bolts and hand tools cannot drop onto the battery. or touch the cell sides, The above refers to pocket plate nickel cadmium cells and not to sintered plate nickel. cadmium cells for which reference should be made to the manufacturer s instructions. Precautions, Sulphuric acid will destroy alkaline batteries and utensils which have been used for this. acid should not be used with such batteries It is also important to avoid any. contamination from the fumes of lead acid types of batteries. Braided Rubber Cord, Braided rubber cord should be stored in a cool dark place with an even temperature not.
exceeding 18 C with relative humidity of approximately 65 percent The cord should not. come in contact with any radiant heat grease oil water organic solvents or corrosive. Storage at elevated temperatures may cause permanent deterioration of the rubber and. prolonged storage at low temperatures will cause temporary stiffening of the rubber. Braided rubber cord has a storage limiting period of four years if stored in good. conditions A cord which has been issued from stores within the four year period from. the date of manufacture may remain in service until the expiry of five years from that. The date of manufacture of cordage can be determined by the colour of the threads in. the cotton outer casing namely,light blue 1966,black 1967. mid green 1968,01 Apr 2016 13 CAA of Mongolia,Advisory Circular AC00 2. heliotrope purple 1969,yellow 1970, after 1970 the colours are repeated in the same sequence. The number of coloured threads indicates the quarter of the year in which the cord was. manufactured namely, one thread indicates that the cord was made between 01 January and 31 March. two threads indicates that the cord was made between 01 April and 30 June. three threads indicates that the cord was made between 01 July and 30 September. four threads indicates that the cord was made between 01 October and 31. December inclusive, Details are given in the British Standard Specification F51 Light Duty Braided Rubber.
Cord for Aeronautical Purposes,Compressed Gas Cylinders. Stores which are used for storage of compressed gas cylinders should be well. ventilated The cylinders should not be exposed to the direct rays of the sun and no. covering should be used which is in direct contact with the cylinders Cylinders should. not be laid on damp ground or exposed to any conditions liable to cause corrosion Gas. storage cylinders should normally be fitted with a transportation storage cap over the. shut off valve to help prevent handling damage and contamination of parts which could. cause a risk of explosion of fire Portable gas cylinders should be stored on racks and. where appropriate control heads and gauges should be protected against impact. No heating is required in stores where compressed gas cylinders are kept unless. specified by the manufacturer, Lighting for stores containing combustible gas cylinders should be. flameproof, installed outside the building and provide lighting through fixed windows. Store rooms should be constructed of fireproof materials and the cylinders placed so as. to be easily removable in the event of fire The store should be at a distance from. corrosive influences such as battery charging rooms. Full and empty cylinders should be stored in separate rooms and appropriate notices. displayed to prevent confusion,01 Apr 2016 14 CAA of Mongolia. Advisory Circular AC00 2, Oxygen and combustible gases such as acetylene should not be stored together.
Acetylene cylinders should be stored in the upright position. Oxygen cylinders and generally rounded at the bottom thereby making it unsafe to store. in an upright position without suitable support If cylinders are stacked horizontally. special wedges should be used to prevent the cylinders rolling and the stack of cylinders. should not be more than four high, Breathing oxygen and welding oxygen should be segregated and properly labelled to. avoid confusion In some cases welding oxygen may be used for testing oxygen. components not installed in aircraft but welding oxygen should not be used in aircraft. oxygen systems,Precautions,The following precautions should be noted. If cylinders are exposed to heat the gas pressure will increase and the cylinder. walls may be weakened Cylinders should be stored at some distance from. sources of heat such as furnaces stoves boilers and radiators. Oil or grease will ignite in the presence of oxygen and if the latter is under pressure. an explosion may result Cylinders should be kept away from sources of. contamination such as oil barrels overhead shafting hydraulic components or. any container or component that may contain oil or grease. Smoking exposed lights or fires should not be allowed in any room where. compressed gases are stored and oily or greasy clothes or hands should be. avoided when handling the cylinders, Grit dirt oil and water should be prevented from entering the cylinder valves. When returning any cylinder that may have been accidentally damaged or. overheated the supplier should be notified so that any necessary action may be. taken before refilling,Electrical Cables, Where electrical cables are stored in large reels it is necessary that the axis of the reels. is in a horizontal position If stored with the axis vertical there is a possibility that the. cable in the lowest side of the reel will become crushed.

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