Lect 5 - Aircraft Zoning And Ata Coding System PDF

ME2511 Aircraft Structures Aircraft Zoning and ATA Coding System  Aircraft Zoning and ATA Coding Learning Objectives Understand the Fuselage Butt Line Water three basic Station & Wing re...

ME2511 Aircraft Structures Aircraft Zoning and ATA Coding System  Aircraft Zoning and ATA Coding Learning Objectives Understand the Fuselage Butt Line Water three basic Station & Wing reference lines Line Line Butt Line Understand Major Major the three Sub Zone basic zones Zone Zone Know the aircraft sections (NOTE: Page 18-22 Aircraft Maintenance and Repair) Aircraft Zoning and Referencing General concepts There are several kinds of tasks to be undertaken on aircraft and thus necessary to establish a method to locate and identify specific locations or areas of the aircraft. Even on small aircraft a precise method of locating each structural member or component is essential. Various numbering systems are in use to identify the exact location of specific wing/fuselage frames, bulkheads, etc. Aircraft Zoning and Referencing There are various ways of doing so by specifying the aircraft zones, aircraft sections, station numbers and/or establishing reference planes designated as body stations (B STA/FS), body waterlines (BWL) and body buttock lines (BBL). Depending on aircraft type (US or European), it may be measured in inches or metres from a fixed point of reference, e.g. aircraft nose or some point ahead of it. Usage includes quickly identifying the location of components, centre of gravity of aircraft and the distribution of weight. Zoning also facilitates aircraft servicing, maintenance and repair. Aircraft Zoning and Referencing Reference Lines:  FS – fuselage station  WL – water line  BL – buttock line Large aircraft are also divided into specific zones namely:  Major zone  Major sub-zone  Zone Aircraft Zoning and Referencing Aircraft Fuselage is the body of the aircraft that holds all of the parts together and also the space to carry passengers and/or cargo. The fuselage may be subdivided into Manufacturing Sections Aircraft Structures are specified by the Air Transport Association of America (ATA) under ATA-100 Specifications. http://www.s-techent.com/ATA100.htm# Fuselage station numbering & Reference lines Fuselage (Body) Station Line Reference locations used to determine forward and aft positions on an aircraft. FS – 0 is the reference datum. Fuselage station numbering & Reference lines Water Line A horizontal reference plane used to locate and document vertical positions on an aircraft. Fuselage station numbering & Reference lines Buttock/Butt Line The longitudinal axis of the aircraft that serves as the reference location for positions to the left and right of center. Butt line diagram of a horizontal stabilizer Fuselage station numbering & Reference lines Wing stations are often referenced off the butt line Fuselage station numbering & Reference lines Datum Is an imaginary vertical plane or line from which all measurements (of arm) are taken. A datum established by the aircraft manufacturer. Once the datum has been selected, all moment arms and the location of CG range are measured from this point. Body Station, Water and Butt Lines Examples of Body Station Line, Water Line and Butt Line on a Boeing 747-400 aircraft Wing Reference Lines To locate points on the wing of an airplane Measured from centreline (or butt line) of fuselage Indicated in inches either left or right of centreline ATA 100 - Aircraft Zone Numbering Major Area Zone No. 100 Lower half of the fuselage to the rear pressure bulkhead (below the main cabin deck) 200 Upper half of the fuselage to the rear pressure bulkhead 300 Empennage, including fuselage aft of the rear pressure bulkhead 400 Power-plants and struts or pylons 500 Left wing 600 Right wing 700 Landing gear and landing gear doors 800 Doors 900 Reserved for uncommon differences between aircraft types not covered by standard series numbers ATA 100 - Aircraft Zone Numbering Major zone identified by three-digit numbers with 2nd and 3rd digits being a zero  E.g. 100, 200, 300 … 900 Major zones are divided into major sub-zones by adding a non-zero number to the 2nd digit of major zone number  E.g. 310, 320, 330, 340,…. Major sub-zones are further divided into specific zones by adding a non-zero number to the 3rd digit of major zone number  E.g. 321, 322, 333, ….. ATA 100 - Aircraft Zone Numbering Major Zone No. Area 300 Empennage, including fuselage aft of the rear pressure bulkhead Major Sub-zone No. Area 320 Vertical Stabilizer & Rudder Zone No. Area 321 Vertical Stabilizer Leading Edge Specifying Aircraft Sections Large transport aircraft are constructed by first fabricating the major sections of the fuselage The fuselage is then formed by joining the forward, mid and aft fuselage sections Aircraft Zoning and Referencing Aircraft Structures specified by the Air Transport Association of America (ATA) under ATA-100 Specification. http://www.s-techent.com/ATA100.htm# Work Unit Code more commonly used by the Military