# JASC 7500: Engine Bleed Air System

- Type: JASC system/component code (FAA)
- ATA chapter: 75 Air
- Title in the code table: ENGINE BLEED AIR SYSTEM
- Service difficulty reports: 1,369
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=64
- Page: https://openairdocs.org/jasc/7500

## What it covers

For general reports of turbine engine compressor bleed air systems used to control the flow of air through the engine, cooling air systems, and heated air for engine anti-icing reported with insufficient information to file in a more specific JASC 7500 series code.

## Service difficulty reports (1,369, newest 50)

- [SDR DALA2026100705544](https://openairdocs.org/sdr/DALA2026100705544), Oct 4, 2026: Airbus BD5001A11. BLEED AIR SYS. ODOR. MUSTY/BURNY SMELL COMING FROM AFT GALLEY, CAN SMELL THESE FUMES FROM MID CABIN TO AFT TO THE GALLEY, SMELL STRONGER THE  (N311DU)
- [SDR 2026FA0000650](https://openairdocs.org/sdr/2026FA0000650), Aug 18, 2026: Cessna 525. CONTROL VALVE. FAULTED. AIRCRAFT EXPERIENCED AN AIR DUCT OVERHEAT. (N814DM)
- [SDR 2026FA0000661](https://openairdocs.org/sdr/2026FA0000661), Aug 17, 2026: Cessna 560XL. LINE. BLOWN. ON TAKE OFF NR 2 ENGINE FIRE LIGHT CAME ON. REDUCED POWER ON NR 2 ENGINE, FIRE WARNING EXTINGUISHED. AIRCRAFT RETURNED T (N75WP)
- [SDR ANCF20260808015](https://openairdocs.org/sdr/ANCF20260808015), Aug 8, 2026: Airbus A320214. CONTROL VALVE. ABNORMAL. ENG 1 CTL VALVE FAULT WAS INTERMITENTE DURING CLIMB. IAW TSM75-26-00-810-802-A OPERATIONAL TEST OFF THE FADEC 1A/1B ENGI (N956AV)
- [SDR G1IA20260719113](https://openairdocs.org/sdr/G1IA20260719113), Jul 21, 2026: Beech B300. SHUTOFF VALVE. FAILED. LEFT BLEED AIR FAIL LIGHT ILLUMINATED DURING CLIMB OUT OF BFI. EMERGENCY PROCEDURE CHECK FOR THIS CLEARED, THEN WARNING  (N398GF)
- [SDR N6WA2026070804](https://openairdocs.org/sdr/N6WA2026070804), Jul 6, 2026: Cndair CL6002C11. CLAMP. LOOSE. R BLEED DUCT WARNING AT FL 270. R & R ALL WORN OUT & LOOSE FITTING P-CLAMPS ON BLEED AIR LEAK AIR DETECTION LOOP IN AFT  (N538GJ)
- [SDR 2026FA0000550](https://openairdocs.org/sdr/2026FA0000550), Jun 26, 2026: Lear 60LEAR. SEAL. LEAKING. ON 6/26/2026, N924PS, CYO924 DEPARTED KLAX AND DURING CLIMB, THE CAPTAIN REPORTED THE LH ENGINE FIRE DETECT LIGHT ILLUMI (N924PS)
- [SDR DXTA2026062908584](https://openairdocs.org/sdr/DXTA2026062908584), Jun 25, 2026: Bombdr BD1001A10. BLEED AIR SYS. CONTAMINATED. NOTICED AN OILY BURNING SMELL IN THE AFT CABIN AFTER AIRCRAFT SHUTDOWN. PERFORMED CLEANING PROCEDURE FOR OIL IN THE BLEE (N776QS)
- [SDR R61A2026062300169](https://openairdocs.org/sdr/R61A2026062300169), Jun 23, 2026: Emb ERJ170100SE. BLEED AIR SYS. FAILED. BLEED 1 AND BLEED 2 FAIL MSG IN THE AIR. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. COMPLIED WITH PNEUMATIC BLEED SYST (N640RW)
- [SDR DALA2026060903448](https://openairdocs.org/sdr/DALA2026060903448), Jun 8, 2026: Airbus A321271NX. BLEED AIR SYS. FAULTED. ATB - DUE TO AN ENGINE 1+2 BLEED FAULT. FOUND LOOSE PRSOV SENSE LINE ON NBR 1 ENGINE, RE-INSTALLED SENSE LINE IAW A321 A (N542DE)
- [SDR AALA202605284211](https://openairdocs.org/sdr/AALA202605284211), May 27, 2026: Airbus A319112. TRANSDUCER. FAULTED. AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO PHL DUE TO THE FLIGHT CREW REPORTING A (N771XF)
- [SDR ABXA20260515206](https://openairdocs.org/sdr/ABXA20260515206), May 15, 2026: Boeing 767375. MODULE. FAULTED. DURING TAXI, (L) PACK OFF CAUTION MSG. CREW RETURNED TO THE GATE (BTB). PERFORMED BITE TEST AND RESET OF BLEED SUPPLY MO (N1709A)
- [SDR ABXA20260515205](https://openairdocs.org/sdr/ABXA20260515205), May 15, 2026: Boeing 767375. MODULE. FAULTED. DURING TAXI, (L) ENGINE BLEED OFF MSG. CREW RETURNED TO THE GATE (BTB). PERFORMED BITE TEST AND RESET OF BLEED SUPPLY MO (N1709A)
- [SDR YENA2026051500457](https://openairdocs.org/sdr/YENA2026051500457), May 14, 2026: Airbus A321271NX. WARNING MESSAGE. ILLUMINATED. FLT 1634, SFO-BOS. (ETOPS) CLASS II AIR BLEED MSG ( CLASS II MAINTENANCE MESSAGES DISPLAYED ON ECAM STATUS PAGE OF ECAM  (N2193J)
- [SDR CALA2026050716071](https://openairdocs.org/sdr/CALA2026050716071), May 5, 2026: Boeing 737924ER. SENSOR. FAULTED. CREW REPORTED RT BLEED TRIP OFF LIGHT ILLUMINATED DURING CLIMB. WOULD NOT EXTINGUISH WITH QRH. NO VISUAL INDICATIONS OF  (N68843)
- [SDR 2026F00099](https://openairdocs.org/sdr/2026F00099), Apr 30, 2026: Boeing 737800*. BLEED AIR SYS. FAULTED. NOT POSSIBLE TO ENABLE CROSSBLEED ON ENG 1, AS REQUEST OF STATION ENGINE 2 WAS STARTED IN POSITION. ATTEMPT TO START AT 
- [SDR HNAA2026042000290](https://openairdocs.org/sdr/HNAA2026042000290), Apr 19, 2026: Emb EMB145LR. SWITCH. FAULTED. BLEED 2 VALVE FAIL ON T/O ROLL. RIGHT ENG BLEED INOP. R & R 200 HIGH STAGE PRESSURE SWITCH AND KO172, OPS CHECK GOOD. OK (N661JA)
- [SDR DALA2026040802255](https://openairdocs.org/sdr/DALA2026040802255), Apr 3, 2026: Airbus BD5001A10. BLEED AIR SYS. FAILED. DIVERTED TO DEN DUE TO LT BLEED FAIL CLOSED. FLIGHT SAFELY ON THE GROUND. R & R LT ENGINE HPV. (LP 8313718, AIRCRAFT WAS (N106DU)
- [SDR 2026F00032](https://openairdocs.org/sdr/2026F00032), Mar 17, 2026: Beech B300. BLEED AIR SYS. FAULTED. RIGHT BLEED AIR FAIL RED SEGMENT LIGHT ILLUMINATED AT FL 200 EMERGENCY CHECK LIST RUN LIGHT EXTINGUISHED DECENDING THROU (N76)
- [SDR ICRR202601280001](https://openairdocs.org/sdr/ICRR202601280001), Jan 28, 2026: Boeing 737*. BUSHING. CRACKED. CRACK WAS FOUND ON BUSHING DURING RECEIVING INSPECTION
- [SDR DXTA2026013006707](https://openairdocs.org/sdr/DXTA2026013006707), Jan 27, 2026: Bombdr BD1001A10. BLEED AIR SYS. CONTAMINATED. WHEN TRANSFERRING BLEEDS FROM ENGINES TO APU, A FOUL ODOR IS PRESENT FOR A SHORT TIME. CLEANED OIL IN BLEED AIR SYS AND  (N757QS)
- [SDR HNAA2025122200863](https://openairdocs.org/sdr/HNAA2025122200863), Dec 19, 2025: Emb EMB145LR. CLAMP. LOOSE. BLEED 1 LEAK DISPLAYED DURING TAKE OFF. (FERRY PERMIT ISSUED WITH BLEED 1 VALVE SECURED CLOSED). FACT 19DEC25 22:10 RIC  (N922AE)
- [SDR VNAA2025121811101](https://openairdocs.org/sdr/VNAA2025121811101), Dec 17, 2025: Cndair CL6002C10. SHUTOFF VALVE. FAULTED. L ENG BLEED MSG IN FLIGHT ALSO THIS CAUSE A L COWL A/I MSG. / REMOVED AND REPLACED LH ENG HPSOV IAW AMM 36-12-05-000/400 (N703PS)
- [SDR DALA2025121709179](https://openairdocs.org/sdr/DALA2025121709179), Dec 16, 2025: Airbus BD5001A11. BLEED AIR SYS. ODOR. ATB, RETURNED TO BNA CREW REPORTED DIRTY SOCK SMELL AFTER TAKEOFF. COMPLIED WITH TASK CARD 0550-2001. FOUND FAINT ODOR O (N314DU)
- [SDR R61A2025120900524](https://openairdocs.org/sdr/R61A2025120900524), Dec 9, 2025: Emb ERJ170200LR. CLAMP. LOOSE. BLEED 2 LEAK IN FLIGHT RAN QRH AND MESSAGE WENT AWAY. MESSAGE RETURNED A FEW MINUTES LATER AND DECLARED EMERGENCY, LANDE (N445YX)
- [SDR YENA2025111701106](https://openairdocs.org/sdr/YENA2025111701106), Nov 15, 2025: Airbus A321271NX. BMC. FAULTED. FLT 604, YVR-JFK. (ETOPS) AIRBLEED CLASS II MSG ON ECAM ( CLASS II MAINTENANCE MESSAGES DISPLAYED ON ECAM STATUS PAGE OF (N4074J)
- [SDR IPXA2025111323417](https://openairdocs.org/sdr/IPXA2025111323417), Nov 11, 2025: Boeing 75724APF. DUCT. LEAKING. DURING LEFT ENGINE START, LEFT BLEED DUCT BLEED LEAK. ABORTED ENGINE START, RAN CHECKLIST SMOKE VISIBLE COCKPIT ON GROUN (N402UP)
- [SDR IPXA2025111223417](https://openairdocs.org/sdr/IPXA2025111223417), Nov 11, 2025: Boeing 75724APF. DUCT. LEAKING. DURING LEFT ENGINE START, LEFT BLEED DUCT LEAK. ABORTED ENGINE START, RAN CHECKLIST SMOKE VISIBLE IN THE COCKPT AND ON T (N402UP)
- [SDR DALA2025103107995](https://openairdocs.org/sdr/DALA2025103107995), Oct 29, 2025: Boeing 737832. SLIP JOINT. LEAKING. ATB- RETURNED ATL DUE TO LEFT ENGINE OVERHEAT ON CLIMB OUT. CORRECTIVE ACTION: FOUND ECS BLEED DUCT SLIP JOINT LEAKING.  (N3772H)
- [SDR SWI2025F01464](https://openairdocs.org/sdr/SWI2025F01464), Oct 25, 2025: Cndair CL6002C10. FLOW VALVE. FAULTED. RIGHT BLEED DUCT WARNING WENT TO CAUTION DURING CLIMB. (FLIGHT 5923) INTERROGATED MDC AND FOUND B1- 349538 TROUBLE SHOT  (N789SK)
- [SDR ANCF2025102733](https://openairdocs.org/sdr/ANCF2025102733), Oct 22, 2025: Airbus A320214. ACTUATOR. FAULTED. AFTER TAKE OFF ENG 1 AND 2 BLEED FAULT ON THE OVERHEAD PANEL. RESET UNSUCCESFULLY. AFTER 5 MINUTES RESET SUCCESFULL BUT  (N426AV)
- [SDR YENA2025102101051](https://openairdocs.org/sdr/YENA2025102101051), Oct 20, 2025: Airbus A321271NX. RELAY. FAULTED. FLT#353, BOS-DUB. (ETOPS) CLASS 2 AIRBLEED MESSAGE ON THE STATUS PAGE. ( CLASS II MAINTENANCE MESSAGES DISPLAYED ON ECAM (N2142J)
- [SDR NACA2025100400002](https://openairdocs.org/sdr/NACA2025100400002), Oct 4, 2025: Boeing 76733A. SCREEN. DAMAGED. NR 1 FAN EXIT CASE BLEED AIR DUCT, BLEED SCREENS 8 EA FROM UPPER DUCTS ARE BROKEN / MISSING. REMOVE AND REPLACE 6 EA SCR (N567NC)
- [SDR DALA2025100207147](https://openairdocs.org/sdr/DALA2025100207147), Oct 1, 2025: Airbus A330323. VALVE. FAULTED. DIVERTED INTO MAD DUE TO DUAL BLEED FAULT. REPAIRED LEAK IN SENSE LINE AND REPLACED OVER PRESSURE VALVE. OPS AND LEAK CH (N803NW)
- [SDR SIMA20250930001](https://openairdocs.org/sdr/SIMA20250930001), Sep 30, 2025: Emb ERJ170100SE. WARNING MESSAGE. ILLUMINATED. AFTER TAKEOFF WE GOT BLEED 2 OVERPRESS AND BLEED 2 OFF MESSAGES SO WE FOLLOWED THE QRH PROCEDURE, RESET THE BLEED AFTER  (N785BR)
- [SDR YENA2025092600968](https://openairdocs.org/sdr/YENA2025092600968), Sep 26, 2025: Airbus A321271NX. COOLING TURBINE. WARNING MESSAGE. FLT#73, EDI-JFK. (ETOPS) "ENG 2 TURB COOL FAULT AFTER LANDING ( TCC/TACC VALVE ); (RESOLVED ON W/O: 1443049 TASKCARD: NR (N2193J)
- [SDR JJBA20250925034](https://openairdocs.org/sdr/JJBA20250925034), Sep 22, 2025: Emb EMB145XR. DUCT. SEPARATED. BLEED 1 LEAK, BLEED 1 OVERTEMP, AND ICING CONDITIONS A/ICE INOPERATIVE EICAS MESSAGE IN CRUISE. LOST PRESSURIZATION AFTE (N12135)
- [SDR SWIA2025091500014](https://openairdocs.org/sdr/SWIA2025091500014), Sep 14, 2025: Cndair CL6002C10. VALVE. MISINSTALLED. L BLEED DUCT WARNING AND CAUTION MESSAGE TOGETHER (FLIGHT 6452)UPON ARRIVAL TO AIRCRAFT WHEN FLIGHT CREW WAS ONBOARD AND (N701SK)
- [SDR SIMA202509154004](https://openairdocs.org/sdr/SIMA202509154004), Sep 14, 2025: Emb ERJ170200LR. MODULE. FAULTED. WITH BLEED 1 ON MEL, BLEED 1 OVERPRESSURE ON CLIMB OUT, BLEED 1 FAIL ON LANDING WITH BLEED SELECTED CLOSED PER MEL 36-13 (N292NN)
- [SDR SIMA20250913002](https://openairdocs.org/sdr/SIMA20250913002), Sep 13, 2025: Emb ERJ170200LR. SHUTOFF VALVE. FAILED. BLEED 1 OVER PRESSURE ON TAKEOFF RAN QRH DID NOT GO AWAY DIVERTED. LATER WENT AWAY AND RETURNED. STAYED ON FOR MOST THE  (N292NN)
- [SDR JJBA20251006010](https://openairdocs.org/sdr/JJBA20251006010), Sep 8, 2025: Emb EMB145XR. PRECOOLER. NO TEST. LH ENG BLEED AIR PRECOOLER FAILED PRESSURE TEST. LH PRECOOLER REMOVED AND REPLACED. (N16149)
- [SDR MASA2025090800072](https://openairdocs.org/sdr/MASA2025090800072), Sep 8, 2025: Emb ERJ170200LL. BLEED AIR SYS. FAILED. BLEED 1 FAIL IN FLIGHT - RETURN TO FIELD. PLACED ON MEL (N89317)
- [SDR HEEA202509050001](https://openairdocs.org/sdr/HEEA202509050001), Sep 3, 2025: Skrsky S76C. TRANSDUCER. INOPERATIVE. NUMBER ONE ENGINE BARRIER FILTER MAINTENANCE CAUTION CAME ON IN FLIGHT RETURNED TO HOUMA. ALL OTHER ENGINE INDICATIONS N (N725P)
- [SDR ASMF2025090600235](https://openairdocs.org/sdr/ASMF2025090600235), Aug 30, 2025: Boeing 7378. SHUTOFF VALVE. FAULTY. BLEED LIGHT IS ON ENG NO. 2 CODE 361 611 02 / PRSOV ENGINE 2 WAS REPLACED IAW AMM 36-11-04/401
- [SDR HALA20250825261](https://openairdocs.org/sdr/HALA20250825261), Aug 23, 2025: Airbus A330343. SENSOR. CRACKED. ETOPS - EXCHANGER OUTLET TEMPERTURE SENSOR (10HA1) CRACKED. REMOVED + REPLACED EXCHANGER OUTLET TEMERATURE SENSOR (10HA1 (N5843K)
- [SDR YENA2025082500871](https://openairdocs.org/sdr/YENA2025082500871), Aug 23, 2025: Airbus A321271NX. BUSHING. MIGRATED. FLT#1908, CDG-JFK. (ETOPS) "UPON INSPECTION FOUND ENGINE NUMBER TWO ROD BEARING BUSHING MIGRATED ON FAN AIR VALVE; PERFO (N4073J)
- [SDR IPXA2025081565432](https://openairdocs.org/sdr/IPXA2025081565432), Aug 14, 2025: Boeing 76734AF. DUCT. CRACKED. CRACK- DUCT, NR 1 ENG LPT ACC MANIFOLD 6:00 POS. OK TO WORK (N347UP)
- [SDR I5PA2025081368802](https://openairdocs.org/sdr/I5PA2025081368802), Aug 13, 2025: Boeing 757230. SENSOR. FAULTY. FLT NO: MGE300, LEFT ENG BLEED OFF ON T/O, AIR RETURN HNL. MX PERFORMED FIM 36-10 FT 817, FOUND LH ENG PRECOOLER OUT TEM (N688SL)
- [SDR DALA2025081306047](https://openairdocs.org/sdr/DALA2025081306047), Aug 12, 2025: Airbus A320212. SENSOR. FAULTED. SHIP 3259 - DIV - TO MAF DUE TO LT ENG BLEED OVER-TEMP WITH RT PACK UNABLE TO MAINTAIN CABIN. MASKS DID NOT DEPLOY. CORR (N359NW)
- [SDR UIEA2025080801116](https://openairdocs.org/sdr/UIEA2025080801116), Aug 8, 2025: Boeing 7673S1. LINE. LEAKING. LEAKS WERE DETECTED AT LOCATION N ACCORDING EO1936A088 . REMOVED AND REPLACED CONTROL PRESSURE LINE ON HPSOV AT ENGINE # (N640GT)

All 1,369: https://openairdocs.org/jasc/7500/reports.md

## Airworthiness concern sheets (1)

- [AIR760-2008-06-S-1100, 7500-ACS](https://openairdocs.org/acs/AIR760-2008-06-S-1100%2C%207500-ACS): Part Number Identification Placard. Issued Apr 1, 2008

## Other codes in chapter 75

- [JASC 7510](https://openairdocs.org/jasc/7510): Engine Anti-Icing System (868 reports)
- [JASC 7520](https://openairdocs.org/jasc/7520): Engine Cooling System (328 reports)
- [JASC 7530](https://openairdocs.org/jasc/7530): Compressor Bleed Control (903 reports)
- [JASC 7531](https://openairdocs.org/jasc/7531): Compressor Bleed Governor (21 reports)
- [JASC 7532](https://openairdocs.org/jasc/7532): Compressor Bleed Valve (1,773 reports)
- [JASC 7540](https://openairdocs.org/jasc/7540): Bleed Air Indicating System (108 reports)
- [JASC 7597](https://openairdocs.org/jasc/7597): Engine Bleed Air System Wiring (71 reports)

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