• Consumables: Supplies provided to workers that are expendable. Examples are:
– Issued apparel
– Safety glasses
– Glue, paint, sealant
– Rags
– Sandpaper, brushes, applicators
– Stock items such as rivets, washers, fasteners and other hardware.
• Chit system: A means of controlling tool or parts using assigned identification numbers to individuals. There are several methods of using the chit system.
– Each individual must sign a chit for each tool or part taken. This chit is then kept at the selected control point for inventory.
– Each individual must sign his name or number to a check out sheet located on each tool hook
– Each individual is given “X” number of metal or plastic tags/disks with his name or number on them. He must place one of these on the hook or in the cutout for each tool he takes. If the technician borrows a tool from another individual then he/she must also give that person a chit. At the end of the shift or aircraft movement the technician must account for all of their “X” number of chits. Each of these Chits has the potential to become FOD so the technician must carefully control them.
• Tool Identification systems: All tools, personal and company owned must be properly marked for accountability and inventory. There are numerous permanent methods of marking that must be clear.
– Vibro etching, laser engraving or electric arc marking. Care must be taken so as not to weaken the tool or to make a raised abrasive surface that could damage components.
– Tags: These may be bonded or attached by lanyards or rings. Caution must be taken that these tags or attachments do not become loose FOD.
– Sensors: The use of FRID tags is becoming easier and more economical and has the advantage of being used to find the “misplaced tool” in confined areas. This system provides quick inventory in and out of tools
– Bar Codes: Also provides quick inventory in and out of tools
– Color codes: Provides quick identification but is limited in usability.
• Tool Condition: Tools themselves can the cause of FOD due to being dirty, worn or damaged. All tools should be inspected before use for cleanliness, condition and wear. Chrome flaking off of tools is often a cause of FOD. Worn tools may damage a part while in use.
• Tote Tray/Tool bag: A device for storing/carrying/transporting tools or equipment in a secure manner.
• Tool Pockets: An organized pouch for carrying specific tools that is easily inventoried.
• Electronic Tool Control/Accountability system: A method of tool controls by linking each tool checked out to an individual’s unique identifier, typically a badge with bar codes or a magnetic strip. This is also commonly used in manufacturing areas using automated tool dispensing units (vending machines). 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：Foreign Object Debris and Foreign Object Damage (FOD) Prevention For Aviation Maintenance & Manufacturing(5)
