# JASC 3697: Pneumatic System Wiring - Type: JASC system/component code (FAA) - ATA chapter: 36 Pneumatic - Title in the code table: PNEUMATIC SYSTEM WIRING - Service difficulty reports: 222 - FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=42 - Page: https://openairdocs.org/jasc/3697 ## What it covers For reports indicating a problem with wiring specific to the Pneumatic System. ## Service difficulty reports (222, newest 50) - [SDR AALA202610100699](https://openairdocs.org/sdr/AALA202610100699), Oct 7, 2026: Airbus A319112. PIN. DEFECTIVE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO CLT DUE TO THE FLIGHT CREW REPORTING AN AI (N717UW) - [SDR DXTA2026100910075](https://openairdocs.org/sdr/DXTA2026100910075), Oct 6, 2026: Emb EMB505. WIRE. SHORTED. DURING CRUISE AT FL400, AMBER BLEED 2 LEAK CAS MSG ILLUMINATED. ACCOMPLISHED INITIAL PORTION OF QRH TO ISOLATE THE FAULT (N492QS) - [SDR AALA202603242436](https://openairdocs.org/sdr/AALA202603242436), Mar 20, 2026: Boeing 737823. WIRE HARNESS. DAMAGED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: DURING CLIMB LEFT BLEED TRIP OFF ILLUMINATED. AIRCRAFT AIR (N927NN) - [SDR ABXA202603132100](https://openairdocs.org/sdr/ABXA202603132100), Mar 12, 2026: Boeing 767316. WIRE. DETACHED. IN CRUISE, RT STRUT DUCT LEAK AND RT ENG BLEED OFF LIGHTS ILLUMINATED. CREW DID AN AIR TURN BACK TO SDF. (ATB). MAINTENA (N227CY) - [SDR MASA2025092400078](https://openairdocs.org/sdr/MASA2025092400078), Sep 24, 2025: Emb ERJ170200LR. MODULE. INOPERATIVE. BLEED 2 FAIL IN FLIGHT. R & R AMS CONTROLLER DRIVE MODULES SBDA 2 SLOT 20 SLOT 223. (N89317) - [SDR SWIA2025091600015](https://openairdocs.org/sdr/SWIA2025091600015), Sep 15, 2025: Cndair CL6002C10. CONNECTOR. FAULTED. L BLEED DUCT WARNING MESSAGE AT 7000 FEET AFTER TAKEOFF. COMPLIED WITH QRH PROCEDURE. (FLIGHT 6190) INTERROGATED MDC FOU (N701SK) - [SDR DALA2025042803270](https://openairdocs.org/sdr/DALA2025042803270), Apr 23, 2025: Airbus A321271NX. CONNECTOR. LOOSE. SHIP 5008 - ATO - AT APPROXIMATELY 14KTS DUE TO AIR ENG 1 BLEED ABNORM PR AND AIR ENG 1 HP VALVE FAULT ECAM MESSAGES. CO (N508DA) - [SDR FDEA202503180443](https://openairdocs.org/sdr/FDEA202503180443), Mar 18, 2025: Airbus A300B4622R. WIRE. DAMAGED. #2 HP BLEED VALVE FAULT DURING TAKEOFF. COMPLIED WITH ECAM AND QRH. COORDINATED WITH GOC. BECAUSE OF MAINTENANCE HISTORY (N730FD) - [SDR AALA202502191030](https://openairdocs.org/sdr/AALA202502191030), Feb 18, 2025: Boeing 737823. CIRCUIT BREAKER. TRIPPED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AFTER TAKEOFF WITH BLEEDS TURN OFF THE RIGHT DUCT PRESSURE READ (N200NV) - [SDR HALA20241129344](https://openairdocs.org/sdr/HALA20241129344), Nov 28, 2024: Airbus A330243. WIRE. DAMAGED. ETOPS - FOUND INTERCONNECTING WIRE 18HFON L WING PNEUMATIC LEAK DETECT LOOP A, WITH HIGH RESISTANCE 125 OHMS. REPLACED I (N399HA) - [SDR HNAA2024071500538](https://openairdocs.org/sdr/HNAA2024071500538), Jul 11, 2024: Emb EMB145LR. WIRE. BROKEN. AFTER T/O BLEED 2 LEAK EICAS MSG. RAN QRH AND MSG EXTINGUISHED. T/S IAW FIM 36-20-00-810-801-A TO STEP 9, FOUND WIRE BRO (N692AE) - [SDR ABXA2024032767](https://openairdocs.org/sdr/ABXA2024032767), Mar 27, 2024: Boeing 767383. TERMINAL. BROKEN. AFTER ENGINE START, RIGHT ENGINE PRV STATUS MESSAGE. PERFORMED PRV VALVE INSPECTION AND FOUND THE TERMINAL LUG BROKEN FR (N219CY) - [SDR DALA2023100308124](https://openairdocs.org/sdr/DALA2023100308124), Oct 1, 2023: Airbus A330302. UNKNOWN. UNKNOWN. SHIP 3329 WHILE PERFORMING SYSTEM BITE TEST OF BMC 2 PER WORK CARD #3151- 01037-08B FOUND FAULT "BMC 2 (1HA2)/WRG: TRANS (N829NW) - [SDR ASAA2023092145266](https://openairdocs.org/sdr/ASAA2023092145266), Sep 21, 2023: Boeing 7379. WIRE HARNESS. DAMAGED. WHILE T/S L/P 60683921 FOUND HPSOV CONNECTOR DP202 CONTACTING R/H T/R BLANKET. GROUNDED - YES. CONNECTOR DP202 DAMAGE BE (N920AK) - [SDR ABXA20230831182](https://openairdocs.org/sdr/ABXA20230831182), Aug 31, 2023: Boeing 767383. CIRCUIT BOARD. DEFECTIVE. "LH ENG BLEED OFF LIGHT. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE REMOVED + REPLACED LH PRSOV PER (N219CY) - [SDR 2022FA0000014](https://openairdocs.org/sdr/2022FA0000014), Jan 12, 2022: Lear 60LEAR. SENSING ELEMENT. INDICATION. AFTER DEPARTURE FROM KPBI HEADING TO KMMU WHILE CLIMBING THROUGH 230, THE CREW NOTICED THE LH & RH BLEED LIGHTS ILLUMINA (N601CN) - [SDR DXTA2021091548870](https://openairdocs.org/sdr/DXTA2021091548870), Sep 15, 2021: Cndair CL6002B16. WIRE. DEFECTIVE. DURING INITIAL CLIMB R 14TH DUCT CAS MESSAGE (RED) ANNUNCIATED. QRH CHECKLIST ACCOMPLISHED BUT CAS MESSAGE REMAINED ILLU (N225QS) - [SDR UIEA2021091102009](https://openairdocs.org/sdr/UIEA2021091102009), Sep 11, 2021: Boeing 76731K. TERMINAL. BROKEN. STATUS MSG "R ENG HPSOV"(

TRANSFERRED TO DMI 153387 IAW MEL 36-11-02-02, CAT C.

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LP 1392180: PERFORMED BITE TE (N1373A) - [SDR UIEA2021082801902](https://openairdocs.org/sdr/UIEA2021082801902), Aug 27, 2021: Boeing 76731B. WIRE. DISCONNECTED. EICAS MSG R ENG HPSOV COMPLIED WITH QRH PROCEDURE RT PACK REMAINED OFF FOR REMAINDER OF FLIGHT.(

PERFORMED BITE TEST. (N1361A) - [SDR UIEA2021081401797](https://openairdocs.org/sdr/UIEA2021081401797), Aug 14, 2021: Boeing 76731B. TERMINAL. BROKEN. R ENGINE HPSOV EICAS MESSAGE AFTER TAKEOFF(

FOUND BROKEN TERMINAL OF R HPSOV. RETERMINATED. IAW SWPM 20-30-11. OPS CHE (N1361A) - [SDR NACA2021073100001](https://openairdocs.org/sdr/NACA2021073100001), Jul 31, 2021: Boeing 767323. WIRE. FAULTED. DISCREPANCY: DUCT SPLIT BLEEDS BY 10 PSI. CORRECTIVE ACTION: PERFORMED AIR SUPPLY CONTROL SYSTEM BITE PER AMM 36-23-00, (N321CM) - [SDR J7SA2021072600288](https://openairdocs.org/sdr/J7SA2021072600288), Jul 22, 2021: Emb EMB505. WIRE. UNSECURE. WHILE IN DESCENT, CREW RECEIVED BLEED 1 LEAK CAS. RAN QRH CHECKLIST, DETERMINED THAT #1 ENGINE NEEDED TO BE BROUGHT TO I (N349FX) - [SDR UIEA2021072201614](https://openairdocs.org/sdr/UIEA2021072201614), Jul 22, 2021: Boeing 76737D. WIRE. FAULTED. STAUS MSG R ENG HPSOV STARTED ON APPROACH AS AN INTERMITTENT EICAS MESSAGE.(

PERFORMED AIR SUPPLY CTRL BITE TEST PER A (N1327A) - [SDR NACA2021060900002](https://openairdocs.org/sdr/NACA2021060900002), Jul 9, 2021: Boeing 767323. TERMINAL. BROKEN. SUPPLEMENTAL ENTRY CORRECTIVE ACTION: REMOVED AND REPLACED RH ENGINE HPSOV CONTROLLER IAW AMM 36-11-08. DURING TEST AIR (N351CM) - [SDR ASAA2021051434818](https://openairdocs.org/sdr/ASAA2021051434818), May 14, 2021: Boeing 737890. WIRE HARNESS. DAMAGED. #1 ENG BLEED TRIP ENGINES OFF APU ON. TURNED #1 ENG BLEED OFF, BLEED TRIP EXTINGUISHED. GROUNDED - YES. AFTER GETTING #1 (N569AS) - [SDR QXEA2021051600237](https://openairdocs.org/sdr/QXEA2021051600237), May 14, 2021: Emb ERJ170200LR. CIRCUIT CARD. MALFUNCTIONED. PASSING THROUGH 7,500FT ON DESCENT, BLEED 2 FAIL CAUTION ILLUMINATED. RESET THE BLEED 2 IAW THE E&A CHECKLIST. THE BLEED (N633QX) - [SDR UIEA2021013000156](https://openairdocs.org/sdr/UIEA2021013000156), Jan 30, 2021: Boeing 767383. CONNECTOR. DAMAGED. #1 ENG. FAN AIR MODULATING VALVE (FAMV) WILL NOT MODULATE FROM OPEN(

TRANSFERRED TO DMI# 141691 PER MEL 36-12-02-01, C (N1511A) - [SDR R61A2021012700122](https://openairdocs.org/sdr/R61A2021012700122), Jan 21, 2021: Emb ERJ170200LR. CONNECTOR. DAMAGED. BLEED 1 LEAK MESSAGE, PRESSURE OVER 60 PSI THE WHOLE TIME. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. R & R CONNECTOR (N418YX) - [SDR R61A2020120100831](https://openairdocs.org/sdr/R61A2020120100831), Nov 27, 2020: Emb ERJ170200LR. CONNECTOR. BROKEN. BLEED 1 LEAK IN FLIGHT. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. INSPECTED PRE-COOLER ON E1, REF AMM 36-11-08 AND FO (N113HQ) - [SDR UIEA2020102102281](https://openairdocs.org/sdr/UIEA2020102102281), Oct 21, 2020: Boeing 767324. CONTACTOR. DIRTY. RT ENGINE BLEED OFF EICAS MESSAGE AFTER ENGINE START. TRANSFERRED TO MEL 36-11-01-02A MDDR 136530 CAT C PLACARD INSTALLE (N645GT) - [SDR UIEA2020081871791](https://openairdocs.org/sdr/UIEA2020081871791), Aug 14, 2020: Boeing 767306. CONNECTOR. DIRTY. PNEUMATIC PRESSURE READS APPROXIMATELY 22 PSI LOWER ON RIGHT SIDE COMPARED TO LEFT PNEUMATIC INDICATOR BAD FROM STOCK R/ (N1427A) - [SDR 2020FA0000540](https://openairdocs.org/sdr/2020FA0000540), Aug 3, 2020: Bombdr BD1001A10. CONNECTOR. WORN. PILOT REPORTS BLEED LOOP FAULT. UPON FURTHER INSPECTION SENT MDC DOWNLOAD OFF TO BOMBARDIER, WAS INFORMED TO LOOK AT BLE (N332AR) - [SDR UIEA2020060801211](https://openairdocs.org/sdr/UIEA2020060801211), Jun 5, 2020: Boeing 767306. CONNECTOR. DEFECTIVE. AFTER PUSH BACK AND ENGINE START LT ENG BLEED EICAS, NO DUCT PRESSURE ON LEFT SIDE. TRANSFERRED TO MDDR 129269 PER MEL 3 (N1229A) - [SDR UIEA2020060301198](https://openairdocs.org/sdr/UIEA2020060301198), Jun 2, 2020: Boeing 767306. CONNECTOR. NOT SEATED. LEFT ENG BLEED OFF. PERFORMED AIR SUPPLY BITE PROCEDURE IAW FIM 36-20 FT 804 "PRV", "PRVC" FAULT. RESEATED CONNECTOR OF (N1229A) - [SDR UIEA2020012760128](https://openairdocs.org/sdr/UIEA2020012760128), Jan 24, 2020: Boeing 767306. CONNECTOR. LOOSE. STATUS MESSAGE FOR LT ENG HPSOV, INTERMITTENT EICAS MSG L ENG HPSOV. TROUBLESHOOTING PER AMM 36-11-06 AND WDM 36-11-03 A (N1321A) - [SDR UIEA2020012180089](https://openairdocs.org/sdr/UIEA2020012180089), Jan 17, 2020: Boeing 7673Y0. CONNECTOR. DIRTY. AFTER LANDING R ISLN VALVE CAUTION MSG CAME ON. CLEANED CONNECTOR FWD RT ISLN VALVE AND OPS CHK NORMAL, MSG CLEARED, REF (N1619A) - [SDR UIEA2020011500071](https://openairdocs.org/sdr/UIEA2020011500071), Jan 14, 2020: Boeing 76731B. WIRE. BROKEN. RIGHT ENGINE BLEED LIGHT ON DURING PRE-DEPARTURE CHECK. FOUND BROKEN WIRE AT TERMINAL 2. REPAIRED IAW SWPM 20-10-13. PER (N1361A) - [SDR AALA201910169011](https://openairdocs.org/sdr/AALA201910169011), Oct 14, 2019: Airbus A321231. CONNECTOR. DISCONNECTED. AIRCRAFT WAS GROUNDED: PILOT REPORTS #2 ENGINE HP VALVE OPEN IN CRUISE FLIGHT FL260 1.3EPR 81.9N1 87.1N2 AND AT 1.49EPR (N121AN) - [SDR HNAA2019090300246](https://openairdocs.org/sdr/HNAA2019090300246), Sep 1, 2019: Emb EMB145LR. WIRE HARNESS. DEFECTIVE. PDIS 651 36-21 1903252 01SEP19 BOS CLOSE HIGH STAGE VALVE 1 FAIL MESSAGE DURING T/O ROLL AT ABOUT 80 KTS. FACT 02SEP19 0 (N651) - [SDR O2GA2019081490401](https://openairdocs.org/sdr/O2GA2019081490401), Aug 10, 2019: Cessna 750. CIRCUIT BOARD. FAILED. LEFT STAB BLEED LEAK WARNING ANNUNCIATOR ILLUMINATED DURING FLIGHT. ANNUNCIATOR WENT AWAY WITH POWER REDUCED BUT CAME BA (N904UP) - [SDR UIEA2019080104903](https://openairdocs.org/sdr/UIEA2019080104903), Jul 31, 2019: Boeing 767306. TERMINAL. BROKEN. L ENG HPSOV EICAS MSG FOUND BROKEN CONNECTOR OF WIRES AT TERMINAL 1 OF HPSOV TERMINAL BLOCK V347 WDM 36-11-61-1. REPAIRE (N1399A) - [SDR UIEA2019072604865](https://openairdocs.org/sdr/UIEA2019072604865), Jul 27, 2019: Boeing 767375. CONNECTOR. LOOSE. AFTER ENGINE START, NO ENGINE BLEED AIR ON RIGHT ENGINE. (

FOUND LOOSE CONNECTOR ON PRV CONTROL WIRES. RE-TIGHTENED IA (N649GT) - [SDR UIEA2019062874600](https://openairdocs.org/sdr/UIEA2019062874600), Jun 27, 2019: Boeing 76731K. CONNECTOR. UNSECURE. RIGHT ENG BLEED EICAS MESSAGE.(

RE-RACKED BLEED AIR CONTROL CARD, VISUALLY INSPECTED RH ENGINE PRSOV, REMOVED CONNECTO (N1487A) - [SDR UIEA2019062704604](https://openairdocs.org/sdr/UIEA2019062704604), Jun 26, 2019: Boeing 767306. TERMINAL. BROKEN. DURING ENGINE RUN PNEUMATIC CHECKS, LH PRV NOT OPENING. TROUBLESHOOT PER FIM 36-10 848. FOUND BROKEN TERMINAL LUG AT PIN (N1399A) - [SDR HALA2019062000309](https://openairdocs.org/sdr/HALA2019062000309), Jun 19, 2019: Airbus A330243. WIRE. DAMAGED. ON #2 ENG INSULATION FOUND WIRES 3A015R(5)20 AND 3A016R(B)20 FOR HP VALVE DAMAGED. // REMOVED AND REPLACED #2 ENG 3A015R (N383HA) - [SDR P5CA2019050900067](https://openairdocs.org/sdr/P5CA2019050900067), May 9, 2019: Boeing 7673JHF. CONNECTOR. DIRTY. APU BLEED VAL EICAS MSG.(

APU BLEED VLV ELEC CONNECTOR CLEANED & VLV CYCLED IAW AMM 36-11-10, OPS CHECK NORMAL.

PERFORMED FIM 36-10 FT 878, FOUND WIRE ON THE PRV TO BE TOUCHING SAFETY WIRE. ADJUSTED WIR (N1511A) - [SDR HNAA2019042200112](https://openairdocs.org/sdr/HNAA2019042200112), Apr 19, 2019: Emb EMB145LR. CONNECTOR. DIRTY. PDIS 648 36-10 1937981 19APR19 BTV CLOSE E1 BLEED VALVE FAIL MESSAGE ON TAKEOFF. CREW REPORTED MESSAGE APPEARS AT 70 PER (N648AE) - [SDR UIEA2019022203304](https://openairdocs.org/sdr/UIEA2019022203304), Feb 20, 2019: Boeing 76737D. SHUTOFF VALVE. DAMAGED. #1 ENGINE IDG HEAT EXCHANGER S/O VALVE FILTER HOUSING FILTER STRIP THREADS(

REMOVED AND REPLACED #1 ENGINE IDG HEAT EX (N1327A) - [SDR UIEA2019020103079](https://openairdocs.org/sdr/UIEA2019020103079), Jan 31, 2019: Boeing 76738E. WIRE. BROKEN. R ENG PRV EICAS RECEIVED IN FLIGHT (

TRANSFERRED TO MDDR # 106721 AS PER MEL 36-11-08-01-01A CAT C 

FO (N641GT) All 222: https://openairdocs.org/jasc/3697/reports.md ## Other codes in chapter 36 - [JASC 3600](https://openairdocs.org/jasc/3600): Pneumatic System (508 reports) - [JASC 3610](https://openairdocs.org/jasc/3610): Pneumatic Distribution System (7,148 reports) - [JASC 3620](https://openairdocs.org/jasc/3620): Pneumatic Indicating System (1,276 reports) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.