Airbus320 Fin 4i1x39

11. Functional Item Number (FIN) A. General Description The equipment on the A/C is identified by a unique identifier designated Functional Item Number (FIN). The basic element of the FIN is a two letter code indicating to which System/Circuit the equipment belongs. To this code are added prefixes and/or suffixes which provide the unique identification for individual items of equipment. NOTE:Several identical components which perform the same function in the same circuit can be differentiated by the suffix number. The general rule is that an even suffix identifies a component on the right hand side and an odd suffix identifies a component on the left hand side. NOTE:A complete list of system/circuit letter codes and an explanation of the FIN breakdown can be found in the Introduction of the Aircraft Schematic Manual (ASM), Aircraft Wiring Manual (AWM) and Aircraft Wiring List (AWL). B. Electrical FIN (1) Format For electrical equipment (any component with an electrical connection) the FIN could be for example 1CC1 which is broken down as follows: 1: Sequence number (4 digits) CC: System circuit letter (2 digits) 1: Suffix (3 digits) (2) Connectors Connections to components shall be identified by a suffix letter (or two for multiple connection parts) following the circuit identification. Example: 10CC1-A 10: Sequence number CC: System circuit code 1: Suffix A: Plug identification This will identify plug A on the 10th component in the circuit CC. If there are several connections, the other plugs shall be identified A, B, C, D, etc.. Example 1: 10CC-B 10CC: Component identification B: Plug identification Example 2: 10CC-AA 10CC: Component identification AA: Multiple connection identification NOTE:Connectors on equipment fitted on mountings are identified with reference to the equipment but not with reference to the mounting. As a general rule, the connector PNs given are for connector without s. (3) Fictitious components All components not specifically related to a circuit are identified by fictitious circuit letter V. The second letter defines the type of component. (a) VC A/C electrical connector Example: 12VCA The electrical connector is identified in fictitious circuit VC by a numerical designator.

Example: 3003VC013-A 3003: Sequence Number VC: Fictitious circuit letter 013: Location / suffix A: Plug identification letter (b) VN ground points The ground point is identified in fictitious circuit VN by a numerical designator taken from the complete aircraft. (c) VG ground terminal block The ground terminal block is identified in fictitious circuit VG by a numerical designator taken from the complete aircraft. (d) VP pressure seal/feed thru The pressure seal/feed thru is identified in fictitious circuit VP by a numerical designator. Terminal identifications are indicated to define a precise feed thru identifier for each wire (in the case of wire to wire feed thru). (e) VS Splices Splices are identified like equipment, being grouped by route and by type. Such grouping shall not be systematic, but only accomplished where a priority is required. Identification shall consist of a numerical designator, identifying the group in fictitious circuit VS, and an alpha designator giving connection identification per unit. (f) VT terminal blocks 1 The terminal block is identified in fictitious circuit VT by a numerical designator. 2 Shunt connections for modular type terminals are identified in the Extended Wire List by the letter M followed by a sequence number. Interconnected pins of a terminal block module have the same sequence number. On Wiring diagrams these pins are shown together in one square. (g) VD diode module The diode module is identified in fictitious circuit VD by a numerical designator. Example: 3100VD. (h) VE, VU, VM (I/ Integrated Control ) & racks The s & racks are identified in fictitious circuit VU/VE/VM by a numerical designator. Example: 2416VU - 2416: Component number - VU: Fictitious circuit code for There are several s and racks (circuit VE/VU) with the same function but different configuration in the A/C. The FIN of these components have one or two additional letters between the circuit letter and the suffix. Example: 2040VU A 010 2040VU B 010 2040VU AB 010 Component identification: 2040VU A: first configuration B: second configuration AB: third configuration suffix (position number on the A/C): 010 That means: There are several enger Service Unit (PSU) in the aircraft with 1, 2 or 3 reading lights. These PSUs all have the same basic layout and function but different features. Example: - PSU with 1 reading light: 2040VUA5, 2040VUA88, 2040VUA123; PSUs have same PN and they are interchangeable. -

PSU with 2 reading lights: 2040VUB5, 2040VUB64, 2040VUB112;

PSUs have same PN and they are interchangeable. -

PSU with 3 reading lights: 2040VUAB5, 2040VUAB99, 2040VUAB106; PSUs have same PN and they are interchangeable. (i) VX Printed Circuit Board Printed Circuit Board (PCB) made by an Aircraft Manufacturer is a Drawn Part Assembly which comprises Active and ive Items/Components. C. Mechanical FIN For mechanical equipment, the FIN is similar to electrical FIN. The circuit letter serves to differentiate between mechanical and electrical equipment. The circuit letter M is reserved for mechanical FINs. Example: 3013GM 12. Units of Measurement A. Symbols -----------------------------------------------------------------------------! US. CUSTOMARY SYSTEM ! SI-METRIC MEASUREMENT SYSTEM ! !----------------------------------------------------------------------------! ! ABBREVIATION ! DEFINITION ! ABBREVIATION ! DEFINITION ! !------------------!--------------------!------------------!-----------------! ! deg.F ! Degrees Fahrenheit ! deg.C ! Degrees Celsius ! ! ft. ! Foot ! m ! Meter ! ! USgal ! US Gallon ! l ! Liter ! ! USquart ! US Quart ! l ! Liter ! ! in. ! Inch ! mm ! Millimeter ! ! in.2 ! Square Inch ! mm2 ! Square Millimeter! ! in.2 ! Square Inch ! cm2 ! Square Centimeter! ! lb ! Pound ! kg ! Kilogram ! ! lbf ! Pound Force ! daN ! Deca Newton ! ! lbf.in ! Pound Force-Inch ! m.daN ! Meter deca Newton! ! ! (Torque) ! ! ! ! lbf.ft ! Pound Force-Foot ! m.daN ! Meter deca Newton! ! ! (Torque) ! ! ! ! in.Hg ! Inch of Mercury ! hPa ! Hecto Pascal ! ! oz ! Ounce (Weight) ! g ! Gram !

! psi ! Pound Square Inch ! bar ! Bar ! ! USgal.min ! US Gallon per ! l.min ! Liter per minute ! ! ! minute ! ! ! ! lb.min ! Pound per minute ! kg.min ! Kilogram per ! ! ! ! ! minute ! ! USgal.min ! US Gallon per ! l.min ! Liter per minute ! ! ! minute ! ! ! ! ! ! cc ! Cubic Centimeter ! ! ! ! ! ! -----------------------------------------------------------------------------B. Conversion Tables -----------------------------------------------------------------------------FROM: S.I.MEASUREMENT TO: US CUSTOMARY SYSTEM SYSTEM ----------------------------------------------------------------------------1 bar = 14.5037 psi 1 mm2 = 0.0016 in.2 1 cm2 = 0.1550 in.2 1 daN = 2.2481 lbf 1 g = 0.0353 oz 1 hPa = 0.0295 in.Hg 1 kg = 2.2046 lb 1 kg.min = 2.2046 lb.min 1 l = 0.2641 USgal 1 l = 1.057 USquart 1 l.min = 0.2641 USgal.min 1 mdaN = 88.4956 lbf.in 1 mdaN = 7.3801 lbf.ft 1 m = 3.2809 ft 1 mm = 0.0394 in 1 cm3 = 0.06102 in3 1 hPa = 0.0145 psi Temperature conversion from degrees Celsius (deg.C) to degrees Fahrenheit (deg.F): deg.F = 1.8 x deg.C + 32 -----------------------------------------------------------------------------FROM: US CUSTOMARY SYSTEM TO: S.I. MEASUREMENT SYSTEM -----------------------------------------------------------------------------1 psi = 0.0689 bar 1 in.2 = 645.1600 mm2 1 in.2 = 6.4516 cm2 1 lbf = 0.4448 daN

1 oz = 28.3495 g 1 in.Hg = 33.8640 hPa 1 lb = 0.4536 kg 1 lb.min = 0.4536 kg.min 1 USgal = 3.7854 l 1 USgal.min = 3.7854 l.min 1 USquart = 0.9464 l 1 lbf.in = 0.0113 mdaN 1 lbf.ft = 0.1356 mdaN 1 ft = 0.3048 m 1 in = 25.4 mm 1 in3 = 16.3871 cm3 1 in.Hg = 0.491 psi Temperature conversion from degrees Fahrenheit (deg.F) to degrees Celsius (deg.C): deg.C = 0.5555 x (deg.F - 32)

The marking of systems and circuits is in accordance with the following coding system. A System identification LETTERS . The letters A and B are reserved for special request by an airline for system references where the system is considered likely to be unique to that airline and not covered by the system letters shown in the table. C - Flight controls system D - De-icing E - Engine monitoring F - Flight instrumentation G - Landing gear H - Air conditioning J - Ignition K - Engine control and starting L - Lighting M - Interior arrangement P - DC power supply distribution Q - Fuel R - Radio (navigation communications) S - Radar navigation T - Special electronics V - Fictitious circuits W - Fire protection warning system X - AC Generation distribution B. Circuit identification The identification number of a circuit consists of 2 letters: the letter of the system followed by a letter identifying the circuit within this system. Example: CA - C : System Identification - A : Circuit Identification

C. Identification of circuits (1) C - Flight controls system CA - Autothrust engagement CA - Electrical power supply (FMGS) CA - Discretes/anaterfaces (FMGS) CA - ARINC bus interfaces (FMGS) CC - Engagement internal monitoring CC - Electrical hydraulic power supply (FAC) CC - Discretes/anaterfaces (FAC) CC - ARINC bus interfaces (FAC) CE - Control inputs interface power supply CE - ELAC system (elevator aileron computer) CE - SEC system (spoiler elevator computer) CE - FCDC system (flight control DATA concentrator) CN - Flaps position indicating CN - Slats position indicating CV - Flaps electrical control monitoring CV - Slats electrical control monitoring (2) D - De-icing DA - Probe ice protection DB - Windshield rain protection DD - Ice detection DG - Windshield anti-icing defogging DH - Escape slide locking mechanism ice protection DL - Wing ice protection DN - Engine air intake ice protection DR - Flight crew foot warmers DS - Ancillary equipment (including door area heating s) DU - Drain mast ice protection DV - Water servicing s heating DW - Potable water ice protection (3) E - Engine monitoring EL - Fuel filter clogging warning system EG - Thrust reverser opening mechanism EN - Oil indicating power supply EV - Engine vibration indicating system (4) F - Flight instrumentation FH - Head up display (HUD) FN - Angle of attack indicating FN - Standby data: altitude and airspeed FN - Standby data: attitude and heading FN - Radio magnetic information - switching and indicating FP - Sensor power supply switching FR - Flight number reminder FS - Electrical clock FW - Paravisual indicating (PVI) FX - On board airport navigation system (5) G - Landing gear hydraulics GA - Normal extension retraction GB - Indicating warning GB - Landing gear-position information GC - Steering GD - Yellow main hydraulic power GE - Blue auxiliary hydraulic power (ram air turbine) GG - Normal braking GG - Alternate braking with anti skid

GG - Alternate braking without anti skid GG - Parking/ultimate emergency braking GH - Reservoir pressurization indicating GJ - Blue main hydraulic power GK - Green main hydraulic power GL - Power transfer GN - Hydraulic fluid pressure indicating GP - Ground internal leak test system GQ - Hydraulic fluid quantity indicating GR - Hydraulic fluid temperature indicating GS - Brake cooling GT - Weight and balance system (WBS) GV - Tire pressure indicating system (TPIS) GW - Brake system temperature GX - Yellow auxiliary hydraulic power (electrical/hand pumps) (6) H - Air conditioning HA - Engine bleed air supply system HB - Flow control indicating HD - Avionics equipment ground cooling HC - Cargo compartment heating HF - Leak detection HG - Air distribution recirculation HH - Pack temperature control HJ - Door area heating HK - Cockpit cabin temperature control HL - Pressure control monitoring HN - Cargo compartment ventilation HP - enger compartment seats HQ - Avionics equipment ventilation HT - Control indicating HU - Lavatory/galley ventilation HV - APU bleed air supply and crossbleed systems HZ - Emergency ram air inlet (7) J - Ignition JH - Ignition starting and continuous relight (8) K - Engine control starting KA - Starting KB - Air intake system KC - Engine master control KD - Control monitoring KL - Emergency shutdown KS - Functional interfaces KT - APU oil heating (9) L - Lighting LA - Navigation lights LB - Landing lights LC - Runway turnoff lights LE - General illumination LF - Instrument integral lighting LG - General illumination LJ - Service area lighting LK - Air conditioning duct accessory compt lighting LL - Wheel well lighting LN - Main deck cargo compartment lighting LP - Annunciator light test dimming LQ - Lavatory lighting

LR - Taxi take off lights LS - Equipment compartment lighting LU - FWD-AFT cargo compartment lighting LV - Anti-collision/strobe lighting LW - enger reading lights LX - Wing engine scan lighting LY - Logo lights LZ - Cabin work, cabin attendant (10) M - Interior arrangement MA - Quantity indicating MB - Distribution MC - Galley supply MD - Air supply boost system ME - Electrical service supply MF - Supplementary medical equipment MG - Toilet system MH - enger information system MH - enger entertainment (video) MJ - Cargo compt door electrical control system MK - enger entertainment (music) ML - Forward galley ML - Mid galley unit ML - Aft galley MP - Water draining (dump) MQ - enger compartment fixed interior doors MS - Cockpit seats MT - Razor supply MV - Waste level indicating MW - Entrance stairs system MX - Miscellaneous emergency equipment MY - Semi automatic cargo loading (11) P - DC power supply distribution PB - DC generation - batteries PC - DC essential normal generation switching PE - DC emergency generation (TR) PH - DC essential distribution PN - DC main distribution PP - DC ancillary equipment PR - Refuelling on battery PU - DC main generation (TR) PV - DC generation monitoring indicating PX - DC ground service bus control (12) Q - Fuel QA - Main fuel pump system QC - APU fuel pump system QE - Crossfeed system QF - APU LP fuel shut off QG - Engine LP fuel shut off QH - Additional center tank transfer system QJ - Tank level sensing QL - Main transfer system QN - Fuel control and monitoring system (FCMS) QP - Intercell transfer system QS - Fuel recirculation - cooling QT - Quantity indicating QU - Refuel/defuel system

(13) R - Radio (navigation communications) RB - Aircraft communication addressing reporting system (ACARS) RC - VHF system RD - Pax facilities - air to ground telephone RE - HF/calsel aerocall system RF - Cabin management system RF - Cabin information network system (CINS) RG - Radio management RH - Cabin intercommunication DATA system (CIDS) RJ - Service interphone RK - Cockpit voice recorder RN - Audio management (integrating/flight interphone/selcal/call) RP - ADF RR - Pax facilities - AM/FM radio system RS - VOR/MARKER RT - ILS RU - MLS (microwave landing system) RV - Satellite communication RX - Announcement-music tape reproducer system RZ - Voice privacy system (14) S - Radar navigation SA - Radio altimeter SD - DME SG - TCAS (traffic collision avoidance system) SH - ATC/Mode S (select) SN - Satellite navigation SQ - Weather radar system (15) T - Special electronics TA - On board peripherals and flight operational peripherals TD - Up and down data loading system acquisition/interface and equipment TL - Aircraft information network system TT - Gate link TU - Digital flight data recording sys. intercon. (FDIU, DFDR, LA, QAR) TU - DFRS input interface TV - AIDS interconnection (DMU, DAR.) TV - AIDS input interface TW - Centralized fault display interface (CFDIU) TW - Multifunction printing (printer) TX - Air trafic and information management system (ATIMS) (16) V - Fictitious circuits VB - Main wire routing (harnesses) VC - A/C electrical connectors VD - Diode module VG - Ground terminal block VN - Ground points VP - Pressure seal feedthrough VS - Splices VT - Terminal blocks VU - s VZ - Spare wires (ATA 2499 only) (17) W - Fire protection warning system WA - Avionics compartment smoke detection WC - Cockpit to ground crew call system WD - Engine fire overheat detection WE - Engine fire extinguishing WF - APU fire extinguishing

WG - APU fire overheat detection WH - Cargo compartment smoke detection WJ - enger lighted signs WL - Cabin emergency lighting WN - Emergency escape slide release warning and overpressure warning systems WP - Evacuation signaling equipment WQ - Lavatory smoke detection WR - Control indicating WT - EIS - control WT - DMC - acquisition/interface WT - EIS - switching WV - SDAC - acquisition/interface WW - FWS - acquisition/interface WX - Cargo compartment fire extinguishing WZ - Ground proximity warning system (GPWS) (18) X - AC generation XA - Galley supply control XB - Static inverter (generation) XC - AC essential generation switching XE - AC emergency generation (CSM/G, GCU) XG - AC external power control (GPCU) XH - AC essential distribution XN - AC main distribution XP - AC equipment ancillary XS - AC auxiliary generation (APU generator GCU) XT - Integrated drive generator system (IDG, GCU) XU - AC main generation XX - AC ground service bus control (19) Y - Inert gas system YA - Inert gas generation system 5. Equipment Identification/Functional Item Number (FIN) A. Equipment Equipment on the A/C is generally allocated a unique identifier known as a Functional Item Number (FIN). The basic element of the FIN is a two letter code indicating to which system and circuit the equipment belongs. To this code are added prefixes and/or suffixes which provide the unique identification for individual equipment. NOTE:Several identical components which perform same function in the same circuit can be differentiated by the suffix number. General rule is that even suffix (2, 4, 6...) is identifying any component on right hand side and odd suffix (1, 3, 5...) is identifying component on left hand side. For mechanical equipment the FIN is similar to the electrical FIN except that the second letter of the system/circuit identifier becomes an M (for example GM). For electrical equipment (any component with an electrical connection) the FIN could be for example 14CA1 which is broken down as follows: 14 Fourteenth component in circuit CA CA System/circuit two letter code (Autothrust Engagement) 1 - Suffix - First of several similar systems (Autothrust Engagement 1). B. Connectors Connections to components shall be identified by a suffix letter (or two for multiple connection parts) following the circuit identification. Example: 14CA-A 14 : Component number CA : Circuit code

A : Plug identification This will identify plug A on the 14th component in the circuit CA. If there are several connections, the other plugs shall be identified A, B, C, D, etc... Example 1: 11CA-B 11CA : Component identification B : Plug identification letter Example 2: 14CA-AA 14 : Component number CA : Circuit code - AA : Multiple connection identification NOTE:

Connectors on equipment fitted on mountings are identified with reference to the equipment but not with reference to the mounting.. As a general rule, the connector PNs given are for connector without s.

For computers, plug identifications comply with ARINC 600. (Ref. Fig. 001) C. Fictitious Components All components not specifically related to a circuit are identified by fictitious circuit letter V. The second letter defines the type of component. (1) VC A/C electrical connectors The electrical connector is identified in a fictitious circuit VC by a numerical designator. This identification shall be preceded by a group of numbers. Example: 19VC-A 19 : Component prefix VC : Fictitious circuit code A : Plug identification letter 19VC associated receptacle. (2) VN ground points The ground point is identified in fictitious circuit VN by a numerical designator taken from the complete aircraft. (3) VG ground terminal block The ground terminal block is identified in fictitious circuit VG by a numerical designator taken from the complete aircraft. (4) VP pressure seal/feedthrough The pressure seal/feedthrough is identified in fictitious circuit VP by a numerical designator. Terminal identifications are indicated to define a precise feedthrough identifier for each wire (in the case of wire to wire feedthrough). (5) VS splices Splices are identified like equipment, being grouped by route and by type. Such grouping shall not be systematic, but only accomplished where a priority is required. Identification shall consist of a numeric designator, identifying the group in fictitious circuit VS, and an alpha designator giving connection identification per unit. Example: 24VS A 24 : Component group number VS : Fictitious circuit code A : Identification per unit (6) VT terminal blocks (a) The terminal block is identified in fictitious circuit VT by a numerical designator. Example: 494VT1224 494 : Component number VT : Fictitious circuit code - 12 : The two digits following the circuit code will be reserved for identification of repetitive item numbers. - 24 : The two digits following the repetitive item number will be reserved for identification of the module

number within the repetitive circuit concerned. (b Shunt connections for modular type terminals are identified in the shunt the letter M followed by a ) sequence number is given in the AWL ''Extended Wire List”. Interconnected pins of a terminal block module have the same sequence number. On Wiring diagrams these pins are shown together in one square. (7) VD diode module The diode module is identified in fictitious circuit VD by a numerical designator. Example: 138VD 138 : Component prefix VD : Fictitious circuit code (8) VU s racks The s racks are identified in fictitious circuit VU by a numerical designator. Example: 123VU 123 : Component prefix VU : Fictitious circuit code There are several s and racks (circuit VU) with the same function, but different configuration in the A/C. The FIN of these components have one or two additional letters between the circuit letter and the suffix. Example: 2010VUA4 2010VUB010 2010VUAB22 component identification: 2010VU configuration letter: A first configuration B second configuration AB third configuration suffix (position number on the A/C): 010 That means:there are several enger Service Unit (PSU) in the aircraft with 1, 2 or 3 reading lights. These PSUs all have the same basic layout and function but different features. Example:PSUs in the same column have one PN and they are interchangeable.PSUs in different columns have different PN and they are not interchangeable. --------------------------------------------------------| PSU with | PSU with | PSU with | | 1 reading light | 2 reading lights | 3 reading lights | |-------------------------------------------------------| | 2010VUA4 | 2010VUB4 | 2010VUAB5 | | 2010VUA10 | 2010VUB10 | 2010VUAB20 | | 2010VUA23 | 2010VUB23 | 2010VUAB30 | --------------------------------------------------------Any component and wire which performs the same function in different PSU's have the same identification.