JASC 7820

Service difficulty reports · 248

Reports filed under 7820 · Engine Noise Suppressor, newest first.

Query with SQL
duckdb -csv -c "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 = '7820'
  ORDER BY difficulty_date DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SDR HNAA2026070200564Clamp · looseEXHAUST FUMES STRONGLY SMELLED IN COCKPIT DUIRNG APU AND PACKS RUNNING AFTER LANDING. FOUND MUFFLER CLAMPS LOOSE IN APU AREA ON INTAKE AND EXHAUST TUBES, SECURED CLAMPS AS REQUIRED. RAN APU AND BOTH PACKS, OPS CHECK GOOD. SUSPECT ODOR COMING FROM HEPA FILTJul 1, 2026 · N660CL · Emb EMB145LRSDR 2025FA0000671Muffler · out of positionMUFFLER FLANGE GOING TO NR 4 CYLINDER EXHAUST PIPE DOES NOT MATE ALL THE WAY DUE TO INTERFERENCE OF TUBES GOING TO THE AIR INTAKE BOX. THIS CAUSES AN EXHAUST LEAK THAT CAN LEAD TO DAMAGE OF AIR INTAKE TUBE.Sep 30, 2025 · N274TA · Tecnam P2006TSDR 2024FA0000773Muffler · crackedL/H ENGINE RUNNING ROUGH AT HIGHER POWER SETTINGS. EGT WAS 300-400 DEGREES HIGHER THAN NORMAL. L/H ENGINE RUNNING ROUGH AT HIGHER POWER SETTINGS. EGT WAS 300-400 DEGREES HIGHER THAN NORMAL."- FOUND FORWARD AND AFT EXHAUST MUFFLER BAFFLES CRACKED AND CREATING Oct 3, 2024 · N280AG · Piper PA44180SDR 2024FA0000734Muffler · failedAFTER 3.5 HRS POST EXHAUST SYSTEM OVERHAUL, THE MUFFLER HAD A CATASTROPHIC FAILURE WHERE SECTION OF MUFFLER DEPARTED ASSEMBLY DUE TO INNER BAFFLING FAILED DUE TO MISSING WELD. AIRCRAFT WIRING WAS BURNED ON LT SIDE OF ENGINE (STARTER WIRE) CARBURETOR BOX WAS Aug 11, 2024 · N1925Y · Mooney M20DSDR 7RKR2024043001Muffler · separatedDURING VISUAL INSPECTION PRIOR TO MAINTENANCE RH MUFFLER OF LH ENGINE WAS FOUND TO BE COMPLETELY SEPARATED FROM FORWARD PIVOT ADAPTER TUBE AT TUBE-TO-MUFFLER WELD. THE WELD HAD FAILED THE COMPLETE CIRCUMFERENCE OF THE MUFFLER-TUBE JOINT. THERE WAS EVIDENCApr 29, 2024 · N1274G · Cessna 310RSDR 2024FA0000774Muffler · crackedR/H ENGINE DOES NOT DEVELOP FULL POWER. REMOVED DISASSEMBLED AND INSPECTED R/H AND L/H MAGNETOS PN: 4330, SN: 19121021 AND PN: 4330, SN: 19110026. FOUND POINTS AND ROTORS IN BOTH L/H AND R/H MAGNETOS TO HAVE EXCESSIVE WEAR AND SIGNS OF ARCING. INSTALLED NEW LMar 13, 2024 · N278AG · Piper PA44180SDR 2023FA0000601Muffler · distortedEXHAUST SYSTEM HEAT DEFORMING. NEW MUFFLER SYSTEM INSTALLED @ 449.94 THEN AGAIN @912.12.Oct 17, 2023 · N654SA · Robsin R44RAVENIISDR YV3R2023100200580Shield · crackedCUSTOMER REPORTED SHIELD ASSEMBLY P/N: D314-2 WAS FOUND CRACKED.Aug 29, 2023 · Robsin R44RAVENIISDR FQAR20200916008Muffler · deformedDURING AN INSPECTION BOTH MUFFLERS WERE FOUND WITH HEAT DEFORMATIONS UNDER THE CABIN HEAT SHROUD.Sep 13, 2020 · N545MA · Piper PA28181SDR FQAR20200916009Muffler · deformedDURING AN INSPECTION BOTH MUFFLERS WERE FOUND WITH HEAT DEFORMATIONS UNDER THE CABIN HEAT SHROUD.Sep 5, 2020 · N746PA · Piper PA28181SDR 2020FA0000373Muffler · cracked99.7 HOURS SINCE NEW MUFFLER WAS INSTALLED, NEW MUFFLER HAS 2 INCH CRACK BETWEEN THE NUMBER 2 AND 4 RISER INLETSAug 17, 2020 · N5262Y · Cessna 172SSDR 2020FA0000275Muffler · crackedCRACKED MUFFLER, ALONG THE WELD FOR INTAKE RISER.Jun 2, 2020 · N119BF · Czawsp SPORTCRUISERSDR 2020FA0000269Muffler · crackedMUFFLER HAS 1" CRACK ALONG WELD AT INLET RISER, VERIFIED BY PRESSURE TEST.May 29, 2020 · N627SX · Czawsp SPORTCRUISERSDR 2020FA0000268Muffler · crackedMUFFLER HAS 1" CRACK ALONG WELD AT INLET RISER, VERIFIED BY PRESSURE TEST.May 29, 2020 · N707SX · Czawsp SPORTCRUISERSDR 2020FA0000267Muffler · crackedMUFFLER HAS 1" CRACK ALONG WELD NEAR RISER, VERIFIED BY PRESSURE TEST.May 29, 2020 · N485SC · Czawsp SPORTCRUISERSDR 2020FA0000266Muffler · crackedMUFFLER HAS 1 INCH CRACK NEAR RISER ALONG THE WELD, VERIFIED BY PRESSURE TEST.May 29, 2020 · N287SC · Czawsp SPORTCRUISERSDR 2020FA0000265Muffler · crackedMUFFLER CRACKED 1" LONG ALONG WELD FOR NR 1 CYLINDER RISER PIPE ON MUFFLER SIDE OF SLIP JOINT.May 28, 2020 · N154BF · Czawsp SPORTCRUISERSDR 2020FA0000272Muffler · crackedMUFFLER CRACKED ALONG WELD FOR INLET PIPE ON ENDCAP.Feb 27, 2020 · N370SC · Czawsp SPORTCRUISERSDR 2020FA0000185Muffler · crackedCREW RECEIVED CO WARNING IN FLIGHT. THEY MADE A PRECAUTIONARY LANDING. UPON VISUAL INSPECTION OF EXHAUST SYSTEM FOUND CRACK IN AFT MUFFLER IN THE TRANSITION FROM FORWARD MUFFLER. THE MUFFLER WAS REPLACED NO CO WARNING WAS NOTED ON RUN UP.Feb 27, 2020 · N704ND · Piper PA28181SDR 2020FA0000271Muffler · crackedMUFFLER CRACKED ALONG THE WELD FOR THE INLET PIPE ON ENDCAP,Feb 11, 2020 · N134BF · Czawsp SPORTCRUISERSDR 2020FA0000095Muffler · crackedPILOT SMELLED BURNING OIL IN CABIN, TURNED OFF CABIN HEAT AND SMELL WENT AWAY. INSPECTION FOUND MUFFLER CRACKED AT TAILPIPE ABOUT 3/4 AROUND TAILPIPE TO MUFFLER. MUFFLER WAS A NEW REPLACEMENT FROM AEROSPACE WELDING INSTALLED ON 4/13/3018 3125.8 TACH, REMOVEDJan 29, 2020 · N733TP · Cessna 172NSDR FQAR2018060500031Muffler · damagedDURING INSPECTION FOR POWER LOSS, FOUND BOTH MUFFLERS TO HAVE DAMAGED FLAME TUBES, WITH PIECES OF THE FLAME TUBE OBSTRUCTING THE OUTLET OF THE FORWARD MUFFLER, CAUSING A RESTRICTION OF EXHAUST AND REDUCED POWER.May 14, 2018 · N329PA · Piper PA28181SDR 2018FA0000350Muffler · erodedDURING AN ANNUAL INSPECTION OF AN AIRCRAFT THAT HAD ACCUMULATED 300 HOURS SINCE THE INSTALLATION OF SUPPLEMENTAL TYPE CERTIFICATE (STC) SA02168AT THE FOLLOWING CONDITION WAS OBSERVED. THE MUFFLER OF THE POWERFLOW EXHAUST USES 4 SCREWS AND NUTS AROUND THE LIP OFeb 18, 2018 · N56821 · Piper PA28140SDR 2017FA0000513Muffler · detachedAFTER TAKE OFF, A LOUD NOISE WAS HEARD IN THE COCKPIT. THE PILOT LANDED SAFELY AND ON INSPECTION, FOUND THE MUFFLER HAD BROKEN AWAY FROM THE EXHAUST MANIFOLD.Oct 16, 2017 · N11659 · Bbavia 7KCABSDR 2017FA0000483Muffler · crackedDURING INSPECTION, FOUND THE MUFFLER ASSEMBLY CRACKED AND BULGING AT THE MATING FLANGES TO THE COLLECTORS AND THE WELDED AREA FOR THE TAIL PIPE. THIS IS THE THIRD EXHAUST FROM THAT HAS FAILED IN THE SAME MANNER, JUST ON THIS SHIP ALONE. THIS COULD LEAD TO CARSep 8, 2017 · N442BD · Robsin R44RAVENIISDR 2017FA0000003Attenuator · deployedPLANE TOOK OFF FROM KTRK IN DIRECTION TO KYVR, WHILE IN FLIGHT RIGHT HAND THRUST ATTENUATOR DEPLOYED, THE FLIGHT WAS DIVERTED TO KRNO.Dec 30, 2016 · N547TW · Cessna 525SDR EPUA20160521001Muffler · contaminatedDURING TAKEOFF, PILOT REPORTS OF BURNING PLASTIC SMELL. INSPECTED ACFT & FOUND MELTED PLASTIC ON LT MUFFLER. IT IS BELIEVED THAT THE PLASTIC WAS FROM A TIE WRAP. REMOVED PLASTIC FROM MUFFLER. SUCCESSFUL OPERATIONAL CHECK FLIGHT OF ACFT WAS PERFORMED WITH NMay 21, 2016 · N9948M · Cessna 207ASDR FQAR20160421019Muffler · crackedDURING REPLACEMENT OF THE RT ENGINE NR 3 EXHAUST RISER, THE TECH REMOVED THE AFT MUFFLER. NOTED THE MUFFLER HAD A LARGE, FOUR INCH CRACK. THE CRACK WAS NOT VISIBLE UNLESS THE MUFFLER IS REMOVED, BECAUSE THE FORWARD MUFFLER BLOCKS THE VIEW OF THE AFT MUFFLER'Apr 21, 2016 · N434PA · Piper PA44180SDR OG5S2016FA0000139Muffler · crackedMUFFLER CRACKED INTERNALLY ALLOWING EXHAUST GASES TO ENTER HEATING SHROUD, THEREBY ALLOWING FUMES INTO CABIN.Mar 22, 2016 · N546ND · Cessna 172SSDR CA160211007Muffler · burned(CAN) WHILE AME WAS DOING MORNING SERVICING OF ACFT BEFORE BEING REMOVED FROM HANGAR NOTICED DISCOLORATION ON END OF TAIL PIPE. EXHAUST SOOT WAS CLEANED OFF. SMALL HOLE NOTICED BURNED THRU TAIL PIPE. EXHAUST WAS REPLACED WITH NEW UNIT.Feb 11, 2016 · Cessna 152SDR OG5R2016FA0000046Muffler · crackedCRACKED MUFFLER ALLOWING EXHAUST FUMES TO ENTER THE CABIN.Feb 2, 2016 · N521ND · Cessna 172SSDR CA151007015Shroud · broken(CAN) PILOTS NOTED BANGING NOISE COMING FROM ENGINE AT LOW IDLE. ENGINE SHUTDOWN, COWLING WAS REMOVED. HEAT MUFFLER SHROUD WAS FOUND BROKEN AND BANGING AGAINST ENGINE MOUNT. HEAT MUFFLER WAS INSPECTED FOR DAMAGE NONE WAS FOUND. NEW HEATER SHROUD WAS INSTALLOct 2, 2015 · Cessna A185FSDR CA150930005Muffler · blocked(CAN) THE PILOTS REPORTED THAT THE RT ENGINE WAS RUNNING ROUGH IN CRUISE FLIGHT. MAINTENANCE FOUND THAT THE RT ENGINE FORWARD MUFFLER TAILPIPE WAS ALMOST COMPLETELY BLOCKED WITH THE INTERNAL PIPE JAMMED INTO IT. A NEW MUFFLER WAS INSTALLED. THE INTERNAL FAILUSep 28, 2015 · Piper PA44180SDR 2015FA0000265Muffler · crackedSPOT WELDS FAILED CAUSING CARBON MONOXIDE TO ENTER HEAT SHROUD THEREFORE ENTERING CABIN.Jun 10, 2015 · N572ND · Cessna 172SSDR OG5S2015FA0000238Muffler · crackedMUFFLER IS CRACKED INTERNALY AND SPOT WELDS HAVE BROKEN, ALLOWING CARBON MONOXIDE TO BE RELEASED INTO HEAT SHROUD AND INTO CABIN AREA.May 27, 2015 · N564ND · Cessna 172SSDR OG5S2015FA0000237Muffler · crackedSPOT WELDS IN MUFFLER CAN LET LOOSE, LETTING CARBON MONOXIDE INTO CABIN HEAT DUCT.May 27, 2015 · N511ND · Cessna 172SSDR OG5R2015FA0000200Muffler · failedDURING FLIGHT CARBON MONOXIDE WARNING ILLUMINATED. PILOT RETURNED TO LAND. MAINTENANCE DISCOVERED 2 SPOTWELDS ON THE SHROUD SUPPORT FLANGE OF THE MUFFLER HAD FAILED RESULTING IN OPEN HOLES IN THE MUFFLER CAN. REPLACED MUFFLER WITH NEW UNIT.May 13, 2015 · N539ND · Cessna 172SSDR OG5S2015FA0000187Muffler · crackedSITTING ON THE RAMP IDLING, RECEIVED A HIGH CO2 WARNING AFTER A COUPLE ON MINUTES. SHUTDOWN ENGINE AND CO2 WARNING CEASED. INSPECTED MUFFLER AND FOUND SPOT WELDS PULLING OUT FROM MUFFLER LINER THEREFORE RELEASING EXHAUST INTO HEAT SHROUD.May 9, 2015 · N567ND · Cessna 172SSDR OG5S2015FA0000180Muffler · failedDURING ROUTINE INSPECTION NOTED THAT 2 SPOTWELDS ON THE SHROUD SUPPORT FLANGE OF THE MUFFLER CAN HAD FAILED RESULTING IN OPEN HOLES IN THE MUFFLER CAN. REPLACED MUFFLER WITH NEW UNIT.May 7, 2015 · N563ND · Cessna 172SSDR 2015FA0000161Muffler · failedON TAKEOFF PILOT GOT A CARBON MONOXIDE WARNING ON PRIMARY FLIGHT DISPLAY. RETURNED AND LANDED WITHOUT INCIDENT. MAINTENANCE VERIFIED PRESENCE OF CARBON MONOXIDE DURING RUN-UP. VISUAL INSPECTION REVEALED SPOT WELD FAILED ON MUFFLER BODY WHERE THE SHROUD SUPPApr 22, 2015 · N512ND · Cessna 172SSDR CA150602022Muffler · cracked(CAN) LEFT MUFFLER CRACKED SHORTLY AFTER TAKEOFF. AN IMPACT AGAINST AIRFRAME WAS HEARD. A NORMAL CIRCUIT WAS COMPLETED AND ACFT LANDED SAFELY.Apr 15, 2015 · Grob G115SDR OG5R2015040600123Muffler · crackedSPOT WELDS ON MUFFLER SEPARATED RELEASING EXHAUST INTO HEAT EXCHANGER.Apr 6, 2015 · N515ND · Cessna 172SSDR 2015FA0000117Muffler · deterioratedON COMPLYING WITH AD2015-02-09, FOUND EXHAUST PIPES LEAKING AT THE BALL JOINTS WHERE THEY CONNECT TO THE MUFFLER. 1 SIDE OF 1 BALL JOINT LIP ON THE MUFFLER HAD DETERIORATED SUBSTANTIALLY, FROM ABOUT .065 TO .023. ALL BALL JOINTS SHOWED SIGNS OF LEAKING AND HApr 1, 2015 · N245TA · Tecnam P2006TSDR NJ5R2015FA0000198Baffle · warpedFORWARD MUFFLER BAFFLE ON MUFFLER SYSTEM IS WARPED AND DISTORTED AFTER 199 HRS IN SERVICE. BAFFLE MATERIAL IS TOO THIN FOR APPLICATION.Feb 19, 2015 · N632MR · Cessna 182TSDR 2014FA0000657Muffler · failedMUFFLER DISTORTED, BURNED THROUGH IN TAILPIPE AREA, INSIDE HEATER MUFF.Nov 12, 2014 · N232BB · Diamon DA40SDR 2014FA0000712Muffler · crackedDURING ANNUAL INSPECTION FOUND MUFFLER END WHERE RISER ATTACHES TO BE BROKEN/CRACKED. FURTHER EXAMINATION FOUND RISER CRACKED (VERY TIGHT) AT WELD JOINTNov 3, 2014 · N232L · Cubcft CC18180SDR EPUA201410082014Muffler · leakingPILOT REPORTED EXHAUST SMELL IN CABIN. REPLACED THE MUFFLER, MUFFLER SHROUD & OPERATIONALLY CHECKED HEAT SYS ON GND WITH NO PROBLEMS.Oct 7, 2014 · N9869M · Cessna 207ASDR CA150319006Muffler · cracked(CAN) CRACK IN THE INTERIOR OF THE RT MUFFLER FOUND DURING ANNUAL ENGINE INSPECTION. NEW MUFFLER TO BE INSTALLED.Oct 5, 2014 · Cessna 150GSDR CA140908026Outlet · eroded(CAN) DURING ROUTINE INSPECTION IT WAS DISCOVERED THAT THE MUFFLER OUTLET PIPE HAD AN EXTENSION PIECE THAT APPEARS TO BE OF UNAPPROVED, SUBSTANDARD MATERIAL WELDED ON TO THE ORIGINAL. IT APPEARS THAT THE EXTENSION WAS USED TO DIVERT EXHAUST RESIDUE FURTHER AWSep 5, 2014 · Piper PA28140SDR 2014FA0000452Muffler · blockedTHE FORWARD MUFFLER WAS REMOVED FROM THE NR 1 AND NR 2 CYLINDERS. THE INTERIOR SURFACES OF THE LT AND RT RISERS REVEALED WHITE AND GRAY DEPOSITS CONSISTENT WITH NORMAL OPERATION. A VISUAL INSPECTION REVEALED THE MUFFLER BAFFLING HAD SEPARATED FROM ITS LT SIDJul 28, 2014 · N4931L · Piper PA28180
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