ATA CODE WITH DESCRIPTIONS
Over the years, the JASC code format of the ATA Spec 100 code has gained widespread industry acceptance. In a harmonized effort, the FAA’s counterparts in Australia and Canada have adopted the JASC code with only a few exceptions. Some Canadian aircraft manufacturers have also adopted this new standard.
This code table is constructed by using the new JASC code four (4) digit format, along with an abbreviated code title. The abbreviated titles have been modified in some cases to clarify the intended use of the accompanying code. This table can be used as a quick reference chart, to assist in the coding and review of aircraft structures or systems data (i.e., Service Difficulty Report (SDR), Accident/Incident Report (AID)). The current coding scheme used in the JASC code was introduced in May 1991, for the technical classification of SDR’s. Its predecessor, the FAA aircraft system/component code, is a similar but more complex eight-digit code, which was developed over 25 years ago. It was constructed around the computer technology of that period. It consisted of a four-digit numerical code plus a four-digit alpha character code to make data retrieval possible. Since that time, computer technology has advanced many folds. Reducing the code from eight to four characters simplifies coding, and in some cases, makes JASC coding match the ATA Specification 100 first
three digits, which are used to identify aircraft systems. The ATA code does not reference the fourth digit, so it is free to be used for identifying components.
The JASC code aircraft structural section has increased due to problems inherent with aging aircraft. As an example, FAA code 5301 SXBD was expanded to 20 items due to the high rate of reporting in this area for the year 1989 (8021 reports were received). In some instances, there was very little reporting and codes were combined into other systems if the safety impact was not significant. The overall reduction in codes has been from 568 FAA codes to 488 JASC codes, with the significant increase being in the structural area as stated earlier. The JASC code divides the engine section into two code groups to separate the turbine and reciprocating engines. The codes for the turbine engines are in JASC code Chapter 72, Turbine/Turboprop Engine. The codes for the reciprocating engines are now exclusively found in JASC code Chapter 85, Reciprocating Engine.
The other major deviation from ATA Spec 100 is in ATA section 2730, specifically involves the stall warning system. Early technology (primarily on smaller aircraft) directly linked the sensing of flight attitude to one of the components that furnished the means of manually controlling the flight attitude characteristics (elevator). Today, most large transport category aircraft utilize electronic units to sense the change in the environmental condition called stall, and use the data to influence navigation. ATA
section 3410, Flight Environment Data, includes high-speed warning in its code definition. Stall warning (low speed) is the reciprocal term of high speed warning, so its filing under the same code appears more logical. Thus, with the JASC code it was decided to move the stall warning system to Chapter 34 under the separate JASC code 3418, Stall Warning System.
The FAA is continuing to pursue worldwide involvement from operators and manufacturers in addressing the need for international standardization of aircraft system/component codes. The ultimate goal is to develop a universal aircraft/component numbering standard which can be used in the manufacturer’s maintenance manual, wiring diagram manual, system manuals and illustrated parts catalog. This harmonized standard must be a usable standard for the aircraft manufacturers, air carrier operators and the general aviation community. We welcome comments and feedback regarding the possible forming of working groups to achieve this long range consideration of possibly harmonizing the ATA Specification 100 code and the JASC code.
Credit : Aero Books Sharing is Caring
This code table is constructed by using the new JASC code four (4) digit format, along with an abbreviated code title. The abbreviated titles have been modified in some cases to clarify the intended use of the accompanying code. This table can be used as a quick reference chart, to assist in the coding and review of aircraft structures or systems data (i.e., Service Difficulty Report (SDR), Accident/Incident Report (AID)). The current coding scheme used in the JASC code was introduced in May 1991, for the technical classification of SDR’s. Its predecessor, the FAA aircraft system/component code, is a similar but more complex eight-digit code, which was developed over 25 years ago. It was constructed around the computer technology of that period. It consisted of a four-digit numerical code plus a four-digit alpha character code to make data retrieval possible. Since that time, computer technology has advanced many folds. Reducing the code from eight to four characters simplifies coding, and in some cases, makes JASC coding match the ATA Specification 100 first
three digits, which are used to identify aircraft systems. The ATA code does not reference the fourth digit, so it is free to be used for identifying components.
The JASC code aircraft structural section has increased due to problems inherent with aging aircraft. As an example, FAA code 5301 SXBD was expanded to 20 items due to the high rate of reporting in this area for the year 1989 (8021 reports were received). In some instances, there was very little reporting and codes were combined into other systems if the safety impact was not significant. The overall reduction in codes has been from 568 FAA codes to 488 JASC codes, with the significant increase being in the structural area as stated earlier. The JASC code divides the engine section into two code groups to separate the turbine and reciprocating engines. The codes for the turbine engines are in JASC code Chapter 72, Turbine/Turboprop Engine. The codes for the reciprocating engines are now exclusively found in JASC code Chapter 85, Reciprocating Engine.
The other major deviation from ATA Spec 100 is in ATA section 2730, specifically involves the stall warning system. Early technology (primarily on smaller aircraft) directly linked the sensing of flight attitude to one of the components that furnished the means of manually controlling the flight attitude characteristics (elevator). Today, most large transport category aircraft utilize electronic units to sense the change in the environmental condition called stall, and use the data to influence navigation. ATA
section 3410, Flight Environment Data, includes high-speed warning in its code definition. Stall warning (low speed) is the reciprocal term of high speed warning, so its filing under the same code appears more logical. Thus, with the JASC code it was decided to move the stall warning system to Chapter 34 under the separate JASC code 3418, Stall Warning System.
The FAA is continuing to pursue worldwide involvement from operators and manufacturers in addressing the need for international standardization of aircraft system/component codes. The ultimate goal is to develop a universal aircraft/component numbering standard which can be used in the manufacturer’s maintenance manual, wiring diagram manual, system manuals and illustrated parts catalog. This harmonized standard must be a usable standard for the aircraft manufacturers, air carrier operators and the general aviation community. We welcome comments and feedback regarding the possible forming of working groups to achieve this long range consideration of possibly harmonizing the ATA Specification 100 code and the JASC code.
Credit : Aero Books Sharing is Caring
