# Service difficulty reports: JASC 3710

A list on [JASC 3710](https://openairdocs.org/jasc/3710.md).

Reports filed under 3710 · Vacuum Distribution System, newest first.

Page 1 of 6 · 292 reports

- [SDR AALA202606287933](https://openairdocs.org/sdr/AALA202606287933.md): Vacuum Sys · defective · Jun 23, 2026 · N904AA · Airbus A321231
  > AIRCRAFT WAS GROUNDED: AFTER LANDING, NUMBER 3 FLIGHT ATTENDANT ADVISED THAT DURING THE DESCENT BELOW 10000 FEET HE SMELLED BURNING RUBBER SMELL WHILE SEATED IN THE MID FLIGHT ATTENDANT JUMPSEAT. NUMBER 2 AND 4 FLIGHT ATTENDANTS REPORTED THAT UPON ARRIVAL AT T
- [SDR 2026FA0000137](https://openairdocs.org/sdr/2026FA0000137.md): Pump · inoperative · Jan 9, 2026 · N952JA · Cessna 172S
  > DURING CLIMB THE PILOT NOTICED ENGINE RPM FLUCTUATIONS. AIRCRAFT RETURNED BACK TO THE AIRPORT, DID ENGINE RUN UPS AND NOTICED VACUUM PUMP WAS INOPERATIVE. MAINTENANCE REMOVED FAILED PUMP AND FOUND DRIVE SPLINE SHEARED AND PUMP SEIZED.
- [SDR 2025FA0000545](https://openairdocs.org/sdr/2025FA0000545.md): Pump · seized · Aug 13, 2025 · N87763 · Helio H395
  > THIS WAS A TRAINING FLIGHT. DURING A GO-AROUND, ON CLIMB OUT, THE PILOTS NOTICED THAT THE VACUUM GAGE READ 0 AND THAT THEIR TWO GYRO INSTRUMENTS WERE NO LONGER WORKING. THEY PROCEEDED AROUND THE PATTERN AND LANDED WITHOUT INCIDENT. THE REMOVED PUMP HAD A SH
- [SDR 2024FA0000985](https://openairdocs.org/sdr/2024FA0000985.md): Manifold · failed · Dec 30, 2024 · N540NE · Cessna 402C
  > THIS IS THE 2ND AIRCRAFT I DID HAVE THE SAME PROBLEM WITH (FIRST ONE WAS N9873F CESSNA 402-0303 MORE THAN 10 YEARS AGO). THE VACUUM MANIFOLD (PARKER AIRBORNE DIV. P#1H5-9 S#10AT) FAILED DUE TO WEAK RIVET HEADS, IN ONE INSTANCE TOTAL FAILURE OF BOTH VACUUM SYST
- [SDR 2022FA0000534](https://openairdocs.org/sdr/2022FA0000534.md): Regulator · separated · Sep 20, 2022
  > VACUUM REGULATOR SEPARATED AND CAME APART AT THE ADHESIVE BOND LINE BETWEEN THE MACHINED ALUMINUM BODY BODY AND FIREWALL MOUNTING FLANGE. UNIT WAS NOT MISHANDLED IN ANY WAY AND APPEARS TO BE IN OTHERWISE EXCELLENT CONDITION. I WAS VERY SURPRISED TO SEE THAT ON
- [SDR 2021FA0000127](https://openairdocs.org/sdr/2021FA0000127.md): Venturi · blocked · May 2, 2021 · N21HP · Mtsbsi MU2B26A
  > MU2P (MODEL 26A) VACUUM SYSTEM DISABLED DUE TO MUD DAUBER NEST BLOCKING VACUUM VENTURI EXHAUST PIPE. NEST WAS NOT VISIBLE DURING NORMAL VISUAL INSPECTION. LOSS OF VACUUM PRESSURE DISABLED COPILOT ATTITUDE GYRO, PILOT TURN & BANK INDICATOR AND DE-ICE BOOT DEFL
- [SDR 2021FA0000059](https://openairdocs.org/sdr/2021FA0000059.md): Regulator Valve · defective · Feb 24, 2021 · N280SU · Cessna 172S
  > THE VACUUM REGULATOR VALVE WAS COMPLETELY INOPERABLE. VACUUM SYSTEM INDICATION WAS DIRECTLY PROPORTIONAL TO THE ENGINE RMP. REMOVED VACUUM REGULATOR VALVE PN: AA2H3-2, SN 2-27216 AND INSTALLED NEW PN: AA2H3-2, SN: 2-0HJH04 (8130-3) IAW CESSNA/TEXTRON 172 SER
- [SDR 2020FA0000517](https://openairdocs.org/sdr/2020FA0000517.md): Pump · failed · Oct 3, 2020 · N2060U · Cessna 172S
  > PILOT STATEMENT: ON OCTOBER 3RD, I WAS DOING TRAFFIC PATTERNS AT KTOA. WHEN I START THE ENGINE, I NOTICED THAT THE VACUUM PUMP WAS READING LOW (THE INDICATOR WAS POINTING AT THE BOTTOM), BUT IT WASN'T FAILED. I ASSUMED IT'S DUE TO LOW RPM, SO I DECIDED TO C
- [SDR 2020FA0000014](https://openairdocs.org/sdr/2020FA0000014.md): Pump · failed · Nov 12, 2019 · N6832Y · Cessna 310R
  > VACUUM PUMP FAILED IN LESS THAN 10 HOURS OPERATION. PROBABLY CAUSED BY DE-ICE CONTROL. VALVE RELIEF PRESSURE SET AT 5 PSI, SHOULD BE SET AT 1.5 PSI TO PREVENT OVERWORKING VACUUM PUMP.
- [SDR UIEA2019111405906](https://openairdocs.org/sdr/UIEA2019111405906.md): Manifold · disconnected · Nov 12, 2019 · N1229A · Boeing 767306
  > IN CRUISE FLIGHT, CARGO DET AIR STATUS MESSAGE DISPLAYED.(<P>T/S USING FIM 26-16 FAULT TREE 813. REPLACED PRESSURE SWITCH S454 AND PROBLEM REMAINS. OFF PART (PN: 32V92, SN: NSN). RE-RAN FIM TO STEP 31. SUSPECT FAULTY BLOWER MOTOR M716. SEE ITEM M9 FOR DISCREPA
- [SDR FQAR20191021013](https://openairdocs.org/sdr/FQAR20191021013.md): Regulator Valve · broken · Oct 17, 2019 · N424PA · Piper PA28181
  > PILOT SQUAWKED VAC INOP, VAN ANNUNCIATOR INOP, TROUBLESHOOTING REVEALED THAT THE VAC INOP SWITCH HAD FALLEN OFF THE VACUUM REGULATOR, REGULATOR WAS REMOVED AND INSPECTED, FOUND THE REGULATOR TO BE GLUED TOGETHER AT ALL FITTINGS, THE REASON THE INOP SWITCH IS N
- [SDR 2018FA0000451](https://openairdocs.org/sdr/2018FA0000451.md): Pump · failed · Oct 26, 2018 · N42045 · Cessna 182L
  > NEW VACUUM PUMP FAILURE 3P194-AFC.
- [SDR AALA2018082879060](https://openairdocs.org/sdr/AALA2018082879060.md): Generator · defective · Aug 25, 2018 · N9008U · Airbus A319115
  > AIRCRAFT WAS GROUNDED. INBOUND CREW REPORTS ELECTRICAL SMELL RELATED TOO RIGHT HAND AFT LAVATORY AREA. REPLACED LAVATORY GENERATOR VACUUM PER AMM 38-31-64.
- [SDR RAIA201709290001](https://openairdocs.org/sdr/RAIA201709290001.md): Line · unknown · Sep 29, 2017 · N21144 · Emb EMB145XR
  > PRESSURIZATION IN AUTO MODE SPIKES UPON TURNING ON. R & R VACUUM PUMP VACUUM LINES. PERFORMED OPS CHECK OF PRESSURIZATION SYSTEM, OPS CHECK GOOD
- [SDR 2020FA0000112](https://openairdocs.org/sdr/2020FA0000112.md): Shaft · sheared · May 7, 2016 · N8080U · Piper PA28R201
  > OWNER REPORTED NO VAC. REMOVED VAC PUMP. PLASTIC SHAFT SHEARED. REPLACED WITH NEW VAC PUMP. OPERATIONS CHECKED GOOD.
- [SDR YAAA20151118001](https://openairdocs.org/sdr/YAAA20151118001.md): Shaft · sheared · Nov 18, 2015 · N7380U · Cessna 207A
  > PILOT REPORTS SUCTION READING NIL. REMOVED VACUUM PUMP & SHAFT WAS SHEARED.
- [SDR CA150824005](https://openairdocs.org/sdr/CA150824005.md): Pump · failed · Aug 20, 2015 · Piper PA31350
  > (CAN) THE RIGHT VACUUM PUMP HAS FAILED 4 TIMES IN ONE YEAR WITH THE AIRCRAFT FLYING ONLY 148 HOURS. TWO DIFFERENT AMOS HAVE TROUBLE SHOT THE SYSTEM AND THE PUMPS CONTINUE TO FAIL ON THE ONE SIDE ONLY.
- [SDR CA150604020](https://openairdocs.org/sdr/CA150604020.md): Coupling · sheared · May 17, 2015 · Cessna 150G
  > (CAN) VACUUM COUPLING FAILED. PROBLEM FOUND ON START UP AND FLIGHT ABORTED. REPLACED VACUUM PUMP WITH NEW UNIT. ALL WORK PERFORMED BY MAINTENANCE AND SIGNED OUT IN LOGS.
- [SDR BSYR201309092058](https://openairdocs.org/sdr/BSYR201309092058.md): Pump · failed · Sep 7, 2013 · N761AY · Cessna 210
  > 20 MINUTES AFTER DEPARTURE, VACUUM PUMP FAILED. PILOT RETURNED AND LANDED SAFELY AT BUY WITHOUT INCIDENT.
- [SDR CA130531007](https://openairdocs.org/sdr/CA130531007.md): Pump · failed · May 30, 2013 · Dhav DHC3
  > (CAN) PLASTIC DRIVE COUPLING FAILED. VACUUM PUMP SCHEDULED FOR REPLACEMENT.
- [SDR FAA20140307000147](https://openairdocs.org/sdr/FAA20140307000147.md): Hose · deteriorated · Mar 18, 2013 · N91710 · Mooney M20S
  > LOW VACUUM ON THE STANDBY VACUUM PUMP. DURING REPLACEMENT, NOTICED AN OILY SUBSTANCE IN THE INLET HOSE OF THE STANDBY VACUUM PUMP. INTERNAL INSPECTION OF THE PUMP REVEALED WHAT APPEARED TO BE THE SAME SUBSTANCE. THE PUMP DRIVE DID NOT SHEAR, THE VANES OF TH
- [SDR CA130306010](https://openairdocs.org/sdr/CA130306010.md): Pump · malfunctioned · Mar 3, 2013 · Piper PA31
  > (CAN) LEFT VACUUM PUMP REPORTED INOPERATIVE BY PILOT. VACUMM PUMP REPLACED.
- [SDR CA121012017](https://openairdocs.org/sdr/CA121012017.md): Relief Valve · unserviceable · Oct 10, 2012 · Cessna 208B
  > (CAN) PIC REPORTED ABNORMAL SUCTION INDICATION, AUTO-PILOT ISSUES, FLIGHT NAVIGATION INSTRUMENT INDICATION ISSUES. GROUND FUNCTION TEST OF THE VACUUM/PRESSURE SYS WAS PERFORMED AND RELIEF VALVE WAS FOUND TO HAVE SEVERE SPRING WEAR, VALVE SEAT DAMAGE AND GUIDE
- [SDR CA121009002](https://openairdocs.org/sdr/CA121009002.md): Duct · cracked · Oct 6, 2012 · Emb ERJ170200SU
  > (CAN) FOUND DURING SCHEDULED MAINTENANCE, T-DUCT BELOW PRE-COOLER ON RT PYLON SIDE IS CRACKED. IPC ATTACHED, PN 170-14806-401.
- [SDR CA120419007](https://openairdocs.org/sdr/CA120419007.md): Relief Valve · failed · Apr 19, 2012 · Cessna 208B
  > (CAN) THE PIC SNAGGED THE LOG BOOK,"SUCTION READS 4.1 AT 7500 FT PRESSURE ALT AT 94.5 PERCENT NG. SHOULD BE 4.5-5.5 ". DURING INSPECTION OF THE VACUUM SYS, THE PRESSURE RELIEF VALVE WAS FOUND MISSING FROM THE SILVER DOME THAT COVERS THE RELIEF VALVE. THE REL
- [SDR CA120523017](https://openairdocs.org/sdr/CA120523017.md): Relief Valve · failed · Apr 16, 2012 · Cessna 208
  > (CAN) CHECK NUT LOOSENS ON VALVE ASSY CAUSING VALVE TO DISSASSEMBLE. VALVE DISSASSEMBLES AT VARYING TIMES IN SERVICE RANGING FROM 16 HRS THROUGH 82 HRS.
- [SDR 2011FA0000325](https://openairdocs.org/sdr/2011FA0000325.md): Drive Shaft · sheared · May 11, 2011 · N87DG · Beech K35
  > PUMP DRIVE SHAFT SHEARED RENDERING PUMP INOPERATIVE. THIS IS A SINGLE DRIVE, DUAL VACUUM PUMP. BOTH PUMPS INOPERATIVE.
- [SDR FPI2010F00002](https://openairdocs.org/sdr/FPI2010F00002.md): Shuttle Valve · broken · Nov 1, 2010 · N5489V · Cessna 210L
  > DURING ANNUAL INSP OF ACFT, INSP OF SHUTTLE VALVE OF STANDBY VACUUM SYS FOUND THE VACUUM PUMP SIDE, VALVE SPRING BROKEN. REPLACED WITH NEW PART.
- [SDR 2010FA0000663](https://openairdocs.org/sdr/2010FA0000663.md): Hose · deteriorated · Jun 30, 2010 · N2140D · Mooney M20R
  > PILOT NOTICED A LOW VAC WARNING OF THE ENGINE DRIVEN VACCUME PUMP. TURN THE SWITCH ON FOR THE STANDBY VAC SYS AND THE CIRCUIT BREAKER POPPED. FOUND THE CAUSE OF THE STANDBY VAC PUMP CIRCUIT BREAKER POPPING WAS A FROZEN VAC PUMP. INVESTIGATION REVEALED THA
- [SDR BSYA2010026](https://openairdocs.org/sdr/BSYA2010026.md): Pump · failed · May 6, 2010 · N33DK · Beech 58
  > AFTER DEPARTING, THE RT VAC PUMP FAILED, ACFT RETURNED TO DEPARTURE AIRPORT. R & R VACUUM PUMP, OK FOR SERVICE.
- [SDR CA100104003](https://openairdocs.org/sdr/CA100104003.md): Coupling · failed · Dec 28, 2009 · Cessna 172N
  > (CAN) VACUUM PUMP COUPLING FAILED.
- [SDR GLBA20090508C](https://openairdocs.org/sdr/GLBA20090508C.md): Valve · worn · May 8, 2009 · N218YV · Beech 1900D
  > FLIGHT 5145 - THE PILOTS REPORTED THAT DURING CRUISE THE VACUUM PRESSURE WAS READING AS LOW AS 3.5 AT FLIGHT LEVEL 220. MAINTENANCE REMOVED AND REPLACED THE VACUUM REGULATOR VALVE IAW B1900D MM 37-00-01. THE OPERATIONAL CHECK WAS GOOD.
- [SDR 2009FA0000467](https://openairdocs.org/sdr/2009FA0000467.md): Tube · separated · May 1, 2009 · N5481N · Cessna 182R
  > A SIGNIFICANT PROBLEM OCCURRED IN THE FUEL INDUCTION SYSTEM, WHERE A RUBBER INTAKE TUBE CONNECTS THE INTAKE MANIFOLD TO THE FUEL INDUCTION RAIL. SHORTLY AFTER A FLIGHT WHERE ENTIRELY NORMAL OPERATION WAS EXPERIENCED, ENGINE RESTART COULD NOT BE ACCOMPLISHED.
- [SDR BSYA2009022](https://openairdocs.org/sdr/BSYA2009022.md): Pump · damaged · Apr 6, 2009 · N33WC · Beech 58
  > AIRCRAFT WAS EN ROUTE FROM LUK TO BKL WHEN THE RIGHT VAC PUMP FAILED. DIVERTED TO LCK. MAINTENANCE REMOVED AND REPLACED PUMP, OPS CHECKS GOOD.
- [SDR CA090210009](https://openairdocs.org/sdr/CA090210009.md): Drive Shaft · sheared · Feb 4, 2009 · Piper PA31350
  > AFTER INSTALLING THE PUMP ON THE AIRCRAFT THE PUMP SEIZED AND THE DRIVE SHEARED. THE PUMP WAS AN OVERHAULED PUMP.
- [SDR CA090210004](https://openairdocs.org/sdr/CA090210004.md): Shaft · sheared · Feb 3, 2009 · Piper PA31350
  > ON TAKEOFF THE RT PNEUMATIC SOURCE LIGHT ILLUMINATED. THE AIRCRAFT REJECTED TAKEOFF AND RETURNED TO BLOCKS. MAINTENANCE DISCOVERED THE DRIVE ON THE PNEUMATIC PUMP SHEARED.
- [SDR FFKA01272008001](https://openairdocs.org/sdr/FFKA01272008001.md): Pump · failed · Jan 27, 2009 · N38305 · Piper PA32R300
  > PILOT REPORTED A VACUUM FAILURE WHILE EN ROUTE TO KCAE.
- [SDR BSYA2009007](https://openairdocs.org/sdr/BSYA2009007.md): Plug · missing · Jan 26, 2009 · N3587P · Piper PA31350
  > WHILE TROUBLESHOOTING AN ALTERNATOR PROBLEM MAINTENANCE FOUND THAT AT 2000 RPM ONLY HAD 3 INCH VAC PRESSURE. FOUND THE VANE WEAR INSPECTION PLUG MISSING FROM VAC PUMP S/N D3497 TSN 475.7 RAPCO. REMOVED AND REPLACED PUMP.
- [SDR CA081205007](https://openairdocs.org/sdr/CA081205007.md): Line · corroded · Dec 4, 2008 · Cessna 414A
  > (CAN) UPON REACHING CRUISE FLIGHT AND ACTIVATING AIRFRAME PNEUMATIC DE-ICE SYSTEM, THE BOOTS WOULD REMAIN PARTIALLY TO MOSTLY INFLATED. THIS PROBLEM WOULD NOT DUPLICATE ON A GROUND RUN. THE VACUUM LINE TO THE FLOW VALVES WAS INSPECTED AND A LINE ASSEMBLY TO
- [SDR 2008FA0000739](https://openairdocs.org/sdr/2008FA0000739.md): Adapter · damaged · Nov 3, 2008 · N30830 · Cessna 172M
  > AIRCRAFT HAD A FRESHLY OVERHAULED ENGINE INSTALLED AND WAS MAKING ITS FIRST FLIGHT. DURING CRUISE, IN VFR CONDITIONS, THE PILOT NOTED A OVERHEATING TYPE OF ODOR AND THEN NOTED A MOMENTARY SMALL REDUCTION IN POWER AFTER WHICH POWER RETURNED TO NORMAL. THE PIL
- [SDR CA080822011](https://openairdocs.org/sdr/CA080822011.md): Pump · seized · Jul 25, 2008 · Piper PA31
  > (CAN) DURING INSPECTION THE LT ENGINE VACUUM PUMP FOUND SEIZED, REPLACED.
- [SDR 2008FA0000264](https://openairdocs.org/sdr/2008FA0000264.md): Pump · failed · Apr 2, 2008 · N8050U · Beech 58
  > VACUUM PUMP FAILED TO DEVELOP ANY AIR OUTPUT UPON INSTALLATION. REMOVED PUMP AND INSPECTED, SUSPECT VANES ARE NOT SLIDING OUT AGAINST CYLINDER WALL THUS NOT ALLOWING ANY AIR TO BE DEVELOPED. (K)
- [SDR BSYA20080003](https://openairdocs.org/sdr/BSYA20080003.md): Pump · failed · Jan 15, 2008 · N3695V · Beech 58
  > AFTER TAKEOFF OUT OF BDL LOST RIGHT VAC PUMP, RETURNED TO BDL. MAINTENANCE CHANGED RIGHT VAC PUMP, OPS CHECKS GOOD.
- [SDR CA071203001](https://openairdocs.org/sdr/CA071203001.md): Vane · broken · Dec 2, 2007 · Piper PA31310
  > (CAN) DURING A PRE-MAINTENANCE GROUND RUN, IT WAS NOTED THAT THE RT AIR PUMP WAS INDICATING INOPERATIVE DURING INSPECTION. THE DRIVESHAFT WAS FOUND TO BE SHEARED DUE TO THE CARBON VANES BREAKING AND JAMMING THE PUMP. (TC NR 20071203001)
- [SDR 2007FA0000981](https://openairdocs.org/sdr/2007FA0000981.md): Relief Valve · separated · Nov 3, 2007 · N1232Y · Cessna 208B
  > RELIEF VALVE FOR BLEED AIR PNEUMATIC SYSTEM END WASHER AND CAP SEPARATED FROM VALVE AND LAYING IN BOTTOM OF COWLING. SUSPECT RIVET HOLDING PARTS ON IS TOO SOFT. THIS IS THE THIRD VALVE TO FAIL LIKE THIS ON DIFFERENT AIRCRAFT IN THE LAST MONTH. AND ALL WERE N
- [SDR CA071023007](https://openairdocs.org/sdr/CA071023007.md): Pump · inoperative · Oct 22, 2007 · Piper PA31
  > (CAN) WHILE PERFORMING AN COMPRESSION TEST, THE ENGINEER HEARD A SQUEAKING AS THE PROP WAS BEING ROTATED. THE SOURCE WAS INDENTIFED COMING FROM THE VACUUM PUMP. PUMP WAS REPLACED AND NO FURTHER ISSUES WERE NOTED. (TC NR 20071023007)
- [SDR DUFA081607001](https://openairdocs.org/sdr/DUFA081607001.md): Drive Assy · sheared · Aug 16, 2007 · N3796C · Cessna 402B
  > WHILE IN CRUISE FLIGHT, THE PILOT NOTICED OIL STREAMING FROM THE TOP OF THE LT ENGINE COWL. THE OIL PRESSURE WAS STILL IN THE NORMAL OPERATING RANGE AND THE ENGINE APPEARED TO BE OPERATING NORMALLY. AS A PRECAUTION, THE LT ENGINE WAS SHUTDOWN AND SECURED. THE
- [SDR 01302007](https://openairdocs.org/sdr/01302007.md): Pump · damaged · Jan 30, 2007 · N610BW · Gulstm 500B
  > LEFT VACUUM PUMP LOOSENED FROM ENGINE AND CAUSED A LOOSE OF OIL PRESSURE. THE VACUUM PUMP DRIVE WAS DAMAGED IN THAT THE GEAR WAS ROUNDED OFF. IT WAS HARD TO DETERMINE IF THE GEAR WORE AND CREATED STRESS TO WORK IT LOOSE FROM THE ENGINE OR IT WORKED LOOSE AND
- [SDR 155SW111506](https://openairdocs.org/sdr/155SW111506.md): Pump · leaking · Nov 15, 2006 · N155SW · Cessna 414
  > APPROXIMATELY 40 MINUTES INTO A FLIGHT FROM CLARKSBURG, WV (KCKB) TO ST. MARY'S COUNTY, MD (2W6), OIL WAS OBSERVED ON THE RIGHT ENGINE NACELLE STARTING AT THE VENT ON TOP OF THE NACELLE AND EXTENDING BACK TO THE TRAILING EDGE. AS A PRECAUTIONARY MEASURE, THE
- [SDR 2007FA0000007](https://openairdocs.org/sdr/2007FA0000007.md): Pump · worn · Oct 30, 2006 · N865AF · Grob G120A
  > DURING FLIGHT SUCTION PRESSURE READING DROPPED TO ZERO, DURING FURTHER TROUBLESHOOTING, TECH FOUND THE ENGINE DRIVEN AIR PUMP WAS NOT PRODUCTING ENOUGH SUCTION. PROBABLE CAUSE COULD BE FROM PISTION WEARING INSIDE OF PUMP. RECOMMENDATION AT THIS TIME IS FOR T

Next page: https://openairdocs.org/jasc/3710/reports.md?page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
WHERE jasc_code = '3710'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/3710/reports

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