# JASC 7531: Compressor Bleed Governor

- Type: JASC system/component code (FAA)
- ATA chapter: 75 Air
- Title in the code table: COMPRESSOR BLEED GOVERNOR
- Service difficulty reports: 21
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=65
- Page: https://openairdocs.org/jasc/7531

## What it covers

The unit controlling relative position of the compressor bleed valve in turbine engines for air flow control.

## Service difficulty reports (21)

- [SDR CALA2025011000077](https://openairdocs.org/sdr/CALA2025011000077), Jan 7, 2025: Boeing 737924ER. ACTUATOR. FAULTED. ON TAKE OFF ENG 2 MADE A LOUD POP AND N1 ROLLED BACK. EGT WAS SL OW TO ROLL BACK. DEBRIEFED CREW ABORTED T/O ROLL AFTER  (N37413)
- [SDR HALA20240624168](https://openairdocs.org/sdr/HALA20240624168), Jun 21, 2024: Airbus A330243. CONTROL UNIT. FAULTED. ETOPS - ENG 1 CONTROL SYS FAULT ON ECAM PAGE. REMOVED AND REPLACED VSV CONTROL UNIT PER AMM 75-33-51 ON #1 ENG. VERIFICA (N393HA)
- [SDR CALA2024021900464](https://openairdocs.org/sdr/CALA2024021900464), Feb 15, 2024: Boeing 757224. GOVERNOR. FAULTY. NUM 2 ENG GAVE PARTIAL POWER AT CRUISE EPR INDICATED 1.3 APROX 3 0 PERC LOSS TPU BITE SHOWED FAULT CODE 20 PCC/GR TEST F (N57111)
- [SDR HALA2022112100297](https://openairdocs.org/sdr/HALA2022112100297), Nov 20, 2022: Airbus A321271N. HPC. USED. ETOPS-DURING PDC FOUND #2 ENG LEAKING FUEL AT HPC PRIMARY STATOR VANE ACTUATOR. REMOVED AND REPLACED #2 ENG HPC PRIMARY  (N216HA)
- [SDR HALA2022101900274](https://openairdocs.org/sdr/HALA2022101900274), Oct 12, 2022: Airbus A321271N. BUFFER VALVE. USED. SUPPLEMENTAL INFORMATION (THIS SUBMISSION IS FOR TYPO CORRECTION OF HALA2022101800274 - TYPO CORRECTION TO BLOCK 2.J FLI (N217HA)
- [SDR ASAA2022091840001](https://openairdocs.org/sdr/ASAA2022091840001), Sep 18, 2022: Boeing 737890. ACTUATOR. LEAKING. FUEL LEAKING UNDER ENGINE 1. GROUNDED - YES. REMOVED AND REPLACED #1 ENG L/H VSV ACTUATOR REF B737-800 AMM 75-31-01. (N531AS)
- [SDR I5PA202081888802](https://openairdocs.org/sdr/I5PA202081888802), Aug 18, 2022: Boeing 757230. VALVE. FAULTY. ABORT ENG START ON LEFT ENG DUE TO EGT EXCEEDANCE. R/R L ENG SVA PER AMM 75-31-01. (N888LT)
- [SDR UIEA2022053100560](https://openairdocs.org/sdr/UIEA2022053100560), May 27, 2022: Boeing 747412F. TRANSMITTER. FLAMED OUT. BTB, ENG 2 TAIL PIPE FIRE OBSERVED BY GROUND OPS. ALL INSPECTIONS C/W TO INCLUDE BSI. VSV AND FUEL FLOW TRANSMITTER REPL (N489MC)
- [SDR HALA2022012500026](https://openairdocs.org/sdr/HALA2022012500026), Jan 22, 2022: Airbus A330243. CONTROLLER. DEFECTIVE. PER DELTA MOC. NEED TO REPLACE ENG 1 VSV CONTROL.// REMOVED AND REPLACED ENG 1 VSV CONTROL UNIT PER AMM 75-33-51-400 -80 (N374HA)
- [SDR DALA2021122408039](https://openairdocs.org/sdr/DALA2021122408039), Dec 22, 2021: Boeing 767432ER. NONE. NONE. SHIP 1806 -DIV- TO SLC DUE LT ENGINE COMPRESSOR STALL WHEN ADVANCING THE THROTTLE IN CLIMB. CORRECTIVE ACTION: MAINTENAN (N830MH)
- [SDR CALA2021111802132](https://openairdocs.org/sdr/CALA2021111802132), Nov 18, 2021: Airbus A320232. NONE. FAULTY. ENG 2 COMPRESSOR VANEECAM AT APPROX 90KTSON TAKEOFF REQUSTED VSV ACTUATOR. NONE IN STOCK ORD. REF LOG PG 7432865 FOR ALL (N436UA)
- [SDR N6WA20130817001](https://openairdocs.org/sdr/N6WA20130817001), Aug 17, 2013: Cndair CL6002C10. VALVE. FAILED. LEFT ENGINE SURGE VALVE CLOSED, CAUTION MESSAGE. R & R OBV IAW AMM 75-31-01. OP'S AND LEAK CHECKED GOOD AT THIS TIME. (N157GJ)
- [SDR UALA2012022201076](https://openairdocs.org/sdr/UALA2012022201076), Feb 22, 2012: Boeing 757222. ACTUATOR. FAULTY. TROUBLESHOT NR 1 ENGINE SEC CONT MESSAGE 5989-1 ESN 726585, REPLACED STATOR VANE ACTUATOR PER MM, ADJUSTED SVA PER MM. O (N589UA)
- [SDR ASMF20111209004](https://openairdocs.org/sdr/ASMF20111209004), Dec 9, 2011: Boeing 73776Q. ACTUATOR. LEAKING. DURING TRANSIT CHECK, DETECTED A FUEL LEAK IN RT ENGINE WITH 94 DROPS PER MINUTE. MX DETECTED ACTUATOR DRAIN LINE VSVS W (N997AM)
- [SDR UIAA010208001](https://openairdocs.org/sdr/UIAA010208001), Jan 2, 2008: Doug MD9030. ACTUATOR. MALFUNCTIONED. DURING TAXI,THE (R ENG SYS FAIL) MSG SHOW ON EOAP. BITE RT ENGINE EEC FND (VSV ACT/HC/EEC2) CLM MSG. IAW AMM 75-31-01 RE (N17921)
- [SDR AWXA200601351](https://openairdocs.org/sdr/AWXA200601351), Jul 27, 2006: Airbus A319132. VANE. LACK OF LUBE. DURING CLIMB OUT OF LAS, THE CREW RECEIVED BOTH COMPRESSOR 1 AND 2 VANE FAULT. N ADDITION, THE CREW RECEIVED ENGINE 1 AN (N836AW)
- [SDR EIA200637](https://openairdocs.org/sdr/EIA200637), Mar 21, 2006: Boeing 747212B. CONTROL VALVE. OUT OF ADJUST. WHEN PACKS TURNED ON AFTER T/O, COCKPIT FILLED WITH ACIDIC, SWEET FUMES. ISOLATED PACKS AND BLEED AIR VALVES, WAS UNABLE (N485EV)
- [SDR MEX2003276](https://openairdocs.org/sdr/MEX2003276), Jul 8, 2003: Boeing 7572Q8. REGULATOR. FAILED. AIRCRAFT AIR TURN BACK DUE TO (RT ENGINE BLEED OFF) AND (RT PACK OFF) MESSAGES AT 310 FT, LOOSING CABIN PRESSURE AND APP (N703AM)
- [SDR CH1A200383006](https://openairdocs.org/sdr/CH1A200383006), Mar 16, 2003: Boeing 7272S7. BLEED VALVE. Engine #3 had a compressor stall on approach at 1.2 EPR at 4000 ft and 180 KTS (N683CA)
- [SDR 2001UALA00133](https://openairdocs.org/sdr/2001UALA00133), Feb 20, 2001: Boeing 757222. CONTROLLER. DEFECTIVE. RIGHT DUCT PRESSURE FLUCTUATING BETWEEN 25 PSI AND 40 PSI. EPR FLUCTUATES BETWEEN 1.16 AND 1.28 FL410. *S/D* REPLACED TH (N565UA)
- [SDR CA991027051](https://openairdocs.org/sdr/CA991027051), Aug 24, 1999: Bell 212. COVER. WORN. (CAN) P3 FILTER SPINNING IN THE COVER CAUSING INTERNAL WEAR OF THE UNIT.

## Other codes in chapter 75

- [JASC 7500](https://openairdocs.org/jasc/7500): Engine Bleed Air System (1,369 reports)
- [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 (902 reports)
- [JASC 7532](https://openairdocs.org/jasc/7532): Compressor Bleed Valve (1,772 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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