# JASC 7540: Bleed Air Indicating System - Type: JASC system/component code (FAA) - ATA chapter: 75 Air - Title in the code table: BLEED AIR INDICATING SYSTEM - Service difficulty reports: 108 - FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=65 - Page: https://openairdocs.org/jasc/7540 ## What it covers The systems which indicate temperature, pressure, control positions and warning indications of turbine engine compressor bleed air systems in turbine engines. Typical parts are transmitter, sensor, indicator, lamp, pressure switch, etc. ## Latest service difficulty reports - [SDR SIMA20261008001](https://openairdocs.org/sdr/SIMA20261008001), Oct 8, 2026: WARNING MESSAGE, ILLUMINATED (N240NN) - [SDR AALA202508197007](https://openairdocs.org/sdr/AALA202508197007), Aug 14, 2025: SENSOR, FAILED (N948AN) - [SDR CALA2025060305220](https://openairdocs.org/sdr/CALA2025060305220), May 31, 2025: THERMOCOUPLE, FAULTY (N795UA) - [SDR 2023FA0000699](https://openairdocs.org/sdr/2023FA0000699), Oct 31, 2023: ENGINE, ABNORMAL (N340SF) - [SDR DALA2023041102852](https://openairdocs.org/sdr/DALA2023041102852), Apr 6, 2023: UNKNOWN, UNKNOWN (N140DU) - [SDR 2022FA0000191](https://openairdocs.org/sdr/2022FA0000191), Jan 14, 2022: SENSOR, DEFECTIVE (N980A) - [SDR ASAA2021072635602](https://openairdocs.org/sdr/ASAA2021072635602), Jul 26, 2021: ACTUATOR, FAULTED (N568AS) - [SDR 2021F00144](https://openairdocs.org/sdr/2021F00144), Jun 3, 2021: ENGINE, MAKING METAL (N834GC) - [SDR AALA202104099010](https://openairdocs.org/sdr/AALA202104099010), Apr 8, 2021: TRANSDUCER, FAULTED (N803AW) - [SDR UIEA2021032200682](https://openairdocs.org/sdr/UIEA2021032200682), Mar 22, 2021: WARNING MESSAGE, FALSE INDICATION (N1013A) - [SDR JRAA202009110005](https://openairdocs.org/sdr/JRAA202009110005), Sep 4, 2020: EPR SYSTEM, FALSE INDICATION (N737CS) - [SDR KY7A2019102209001](https://openairdocs.org/sdr/KY7A2019102209001), Oct 9, 2019: MIXING VALVE, WORN (N779BC) - [SDR CA190729013](https://openairdocs.org/sdr/CA190729013), Jul 17, 2019: PRESSURE SWITCH, FAILED - [SDR SIMA2018072523004](https://openairdocs.org/sdr/SIMA2018072523004), Jul 23, 2018: SENSOR, FAILED (N645AE) - [SDR RU3A201807232031](https://openairdocs.org/sdr/RU3A201807232031), Jul 22, 2018: WARNING SYSTEM, ACTIVATED (N88) - [SDR K11A2018043073001](https://openairdocs.org/sdr/K11A2018043073001), Apr 30, 2018: WARNING LIGHT, ILLUMINATED (N730CK) - [SDR VNAA2017062111101](https://openairdocs.org/sdr/VNAA2017062111101), Jun 21, 2017: WARNING SYSTEM, FALSE ACTIVATION (N545PB) - [SDR ASAA2016061217020](https://openairdocs.org/sdr/ASAA2016061217020), Jun 12, 2016: WARNING SYSTEM, FALSE ACTIVATION (N593AS) - [SDR RU3A20160311006](https://openairdocs.org/sdr/RU3A20160311006), Mar 11, 2016: WARNING SYSTEM, ACTIVATED (N58) - [SDR RU3A2016](https://openairdocs.org/sdr/RU3A2016), Mar 11, 2016: WARNING SYSTEM, ACTIVATED (N58) - [SDR RU3A20151028022](https://openairdocs.org/sdr/RU3A20151028022), Oct 25, 2015: WARNING SYSTEM, ACTIVATED (N58) - [SDR 2015FA0000077](https://openairdocs.org/sdr/2015FA0000077), Feb 26, 2015: DISPLAY, FAILED - [SDR CALA2014062091305](https://openairdocs.org/sdr/CALA2014062091305), Jun 17, 2014: WARNING SYSTEM, FALSE ACTIVATION (N805UA) - [SDR VNAA2013013100015](https://openairdocs.org/sdr/VNAA2013013100015), Jan 31, 2013: SENSING ELEMENT, FAULTY (N260JS) - [SDR CA121025010](https://openairdocs.org/sdr/CA121025010), Oct 24, 2012: LINE, RUPTURED - [SDR NSVA20120303464](https://openairdocs.org/sdr/NSVA20120303464), Mar 3, 2012: WARNING SYSTEM, ACTIVATED (N420XJ) - [SDR NSVA20120306464](https://openairdocs.org/sdr/NSVA20120306464), Mar 3, 2012: WARNING SYSTEM, ACTIVATED (N420XJ) - [SDR CA120125017](https://openairdocs.org/sdr/CA120125017), Jan 22, 2012: SWITCH, FAILED - [SDR UALA2011121406873](https://openairdocs.org/sdr/UALA2011121406873), Dec 14, 2011: THERMOCOUPLE, STRIPPED (N216UA) - [SDR UALA2011110906112](https://openairdocs.org/sdr/UALA2011110906112), Nov 9, 2011: PROBE, FAULTY (N796UA) - [SDR CA110907005](https://openairdocs.org/sdr/CA110907005), Sep 7, 2011: TUBE, LEAKING - [SDR VNAA2011083100023](https://openairdocs.org/sdr/VNAA2011083100023), Aug 25, 2011: SENSOR, FAULTY (N719PS) - [SDR CA110614016](https://openairdocs.org/sdr/CA110614016), Jun 13, 2011: LINE, DAMAGED - [SDR CVGA 11 120 2](https://openairdocs.org/sdr/CVGA%2011%20120%202), Apr 25, 2011: WARNING SYSTEM, ACTIVATED (N75HU) - [SDR AALA20100513LAX01](https://openairdocs.org/sdr/AALA20100513LAX01), May 13, 2010: SWITCH, FAULTY (N357AA) - [SDR NSVA201062](https://openairdocs.org/sdr/NSVA201062), Mar 15, 2010: WARNING SYSTEM, ACTIVATED (N199WQ) - [SDR REXA201000035](https://openairdocs.org/sdr/REXA201000035), Mar 13, 2010: SHUTOFF VALVE, FAILED (N176PQ) - [SDR AC2A2009053181959](https://openairdocs.org/sdr/AC2A2009053181959), May 31, 2009: PICKUP, MALFUNCTIONED (N430CT) - [SDR 4533301062008](https://openairdocs.org/sdr/4533301062008), Jan 6, 2008: CLAMP, LOOSE (N438FX) - [SDR 07FDEA05115](https://openairdocs.org/sdr/07FDEA05115), Dec 20, 2007: VALVE, CRACKED (N448FE) - [SDR 2007UALA05008](https://openairdocs.org/sdr/2007UALA05008), Dec 9, 2007: SENSOR, FAULTY (N405UA) - [SDR CA061116005](https://openairdocs.org/sdr/CA061116005), Nov 13, 2006: SWITCH, FAILED - [SDR PCSA1016061SU](https://openairdocs.org/sdr/PCSA1016061SU), Oct 16, 2006: SWITCH, MALFUNCTIONED (N199AJ) - [SDR QXEA200602430](https://openairdocs.org/sdr/QXEA200602430), Sep 18, 2006: WARNING SYSTEM, MALFUNCTIONED (N604QX) - [SDR AMTA200600287](https://openairdocs.org/sdr/AMTA200600287), Apr 23, 2006: REGULATOR, UNSERVICEABLE (N323TZ) - [SDR AMTA200600286](https://openairdocs.org/sdr/AMTA200600286), Apr 22, 2006: BLEED AIR SYS, OUT OF BALANCE (N323TZ) - [SDR DXTA200601317](https://openairdocs.org/sdr/DXTA200601317), Mar 24, 2006: ENGINE, WARNING MESSAGE (N700QS) - [SDR CA060224010](https://openairdocs.org/sdr/CA060224010), Feb 22, 2006: SWIVEL, LEAKING - [SDR QXEA200501148](https://openairdocs.org/sdr/QXEA200501148), Aug 2, 2005: WARNING LIGHT, ILLUMINATED (N404QX) - [SDR RYNA200500012](https://openairdocs.org/sdr/RYNA200500012), Apr 8, 2005: TRANSMITTER, INOPERATIVE (N753NA) --- From OpenAirDocs.org, an independent open copy of FAA data. 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