JASC 2120

Service difficulty reports · 15,389

Reports filed under 2120 · Air Distribution System, 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 = '2120'
  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 GTIA2019051603346Unknown · odorPOSSIBLE FUME EVENT PACK NR 2 -T/S PER TSM 05-50-00. REVIEWED CABIN ODER FORM. CREW REPORTED EVENT HAPPEND ON THE GATE WITH GROUND AIR CONNECTED WITH APU, PACK1 & 2 OFF. DISCONNECTED GROUND AIR RAN APU AND PACK 1 & PACK 2 SMELL DISSIPATED. NO ABNORMAL ODERS EMMay 16, 2019 · N517NK · Airbus A319132SDR AALA201905179003Check Valve · blockedAIRCRAFT WAS GROUNDED: DIRTY SOCK SMELL IN FRONT GALLEY AREA, ESPECIALLY BY DOOR 1L. DURING TAKEOFF, ODOR DISSIPATED VERY SLOWLY. MAINTENANCE FOUND FORWARD LEFT HAND AND RIGHT HAND DOOR SILL DRAIN LINES AND FUSELAGE CHECK VALVE BLOCKED. MAINTENANCE ALSO REMOVEMay 16, 2019 · N930NN · Boeing 737823SDR GTIA2019051503345Unknown · odorFUME EVENT REPORTED BY FA ON APPROACH/TAXI-PERFORMED TSM TASK 05-50-00-810-831-A NO ACFT SYSTEMS NOTED AS SOURCE OF ODOR PACK 1 & 2 AIR FOUND SATISFACTORY ACFT OK TO CONTINUE SERVICE NO PREVIOUS ODOR REPORTED.May 15, 2019 · N649NK · Airbus A320232SDR GTIA2019051403343Unknown · odorFUMES REAR OF AIRCRAFT FA NEEDED MEDICAL KIT. PERFORMED TSM PROCEDURES IAW AMM 05-50-00 NO ODOR OR FAULTS NOTED AIRCRAFT OK FOR SERVICE FA CREW FOR ENGINES.May 14, 2019 · N612NK · Airbus A320232SDR DALA2019051503027Clamp · disconnectedTHE AFT EMERGENCY EXIT LIGHT SPONTANEOUSLY COMES ON AND OFF. IT WAS ALSO NOTED THAT THERE IS WATER IN THAT AREA OF THE CEILING. MAINTENANCE FOUND A DRAIN LINE HOSE CLAMP DISCONNECTED, RESECURED IT AS REQUIRED. LEAK NO LONGER OCCURS. THE NR 4 EMERGENCY BATTERY May 14, 2019 · N922AT · Boeing 717200SDR CA190516023Filter · contaminated(CAN) DIRTY SOCKS SMELL AT TOP OF DESCENT. CREW TURNED OFF PACK ONE AND SMELL DISSIPATED. RESOLUTION AS PER J/C 2-205S-00 SMELL IN CABIN-TROUBLE SHOOTING C/O. DECONTAMINATION RUNS CARRIED OUT. CHANGED OZONE FILTER.May 13, 2019 · Airbus A321211SDR GTIA2019051303342Filter · dirtySTRONG SMELL OF URINE MID CABIN-TROUBLESHOT ODOR, FOUND NO DIFFERENCE PACK 1 OR 2. FOUND RECIRC FILTERS EXTREMELY DIRTY AND SOURCE OF ODOR. REPLACED FILTERS AND NO FURTHER DEFECT NOTED IAW TSM O5-50-00-810-831-A.May 13, 2019 · N634NK · Airbus A320232SDR GTIA2019051303341Unknown · odorFA REPORTED ODOR IN THE CABIN. FOUND WET CARPET IN THE BACK OF THE A/C NO ODOR OF OIL OR FUEL OR HYD FOUND A/C GOOD FOR CONTINUE SVC IAW AMM 21-00-00.May 13, 2019 · N612NK · Airbus A320232SDR DALA2019051302969Unknown · odorAFTER NR 2 ENGINE START, AFT RT LAV SMOKE DETECTOR WENT OFF. FLT ATT STATED THERE WAS A SWEET PEPPERY SMOKE SMELL. C/W NO GO OPDIO PREVENTION PROGRAM ATA 2172. C/W JIC 7100-2619. NO SMOKE NO ODORS. A/C OK FOR SVC. (LP5613270)May 13, 2019 · N956DL · Doug MD88SDR GTIA2019051103339A/C Pack · odorFAINT SMELL OF "SMELLY SOCKS" ON FINAL DECENT, MOST PREVELENT LEVELING AT 4000' THROUGH FINAL APPCH. COCKPIT NOTICED ONLY -ISOLATED TO PACK NR 1 PER TSM 05-50-00 PERFORMED PACK BURNOUT PROCEDURE IAW AMM 21-00-00-615 R&R RECIRCULATION FILTERS IAW AMM 21-21-41 AMay 11, 2019 · N632NK · Airbus A320232SDR ASAA2019051029286Unknown · malfunctionedCOND HOT AIR FAULT ON LANDING GROUNDED - YES. RESET HOT AIR SYSTEM PER AMM 21-20-00. OPS CHECK OK. FAULT CLEAREDMay 10, 2019 · N284VA · Airbus A320214SDR DXTA2019051302379Unknown · odorDURING FLIGHT BURNING SMELL NOTICED NEAR GALLEY AREA. TURNED CABIN MASTER SWITCH OFF AND ODOR WENT AWAY IN LESS THAN 2 MINUTES. CABIN MASTER REMAINED OFF FOR DURATION OF FLIGHT. CORRECTIVE ACTION, WITH POWER TO CABIN INTERIOR ON , OPERATED GALLEY COFFEE ANDMay 10, 2019 · N907QS · Cessna 750SDR 29GA2019051300001Unknown · odorFLIGHT 0072 FLL/GGT: REPORT: BURNING SMELL IN COCKPIT & CABIN. AND VERY WEAK AIRFLOW. CORRECTIVE ACTION: PERFORMED BOTH ENGINE RUN REF AMM 72-00-00. INSPECTED AVIONICS FAN & RACK REF 34-10-00. CHECK FUNCTION OF REC FAN REF 21-40-00. NO DEF NOTED.May 10, 2019 · N362AG · Saab 340BSDR CA190510009Unknown · odor(CAN) SMELL IN CABIN AFTER LANDING WITH RH BLEED FAIL MSG ACRID/BURNING SMELL (NO OIL OR HYDRAULIC) AFTER LANDING WITH T/R`S RH BLEED FAIL MSG DID NOT APPEAR DURING ENGINE RUN AND RH ENG BLEED OPERATION. AMT`S PINPOINT SOURCE OF SMELL DOWN TO LEFT PACK WITMay 9, 2019 · Airbus BD5001A10SDR YENA201905080267Unknown · odorFLT 1216, BUF-BOS. FUME EVENT ON TAKEOFF. NOTICED DIRTY SOCK SMELL IN THE COCKPIT, DURING TAKEOFF ROLL. SMELL WAS STRONG INITIALLY, FADED TO NO SMELL BY 5000 FT; ACCOMPLISHED BORESCOPE ON NR 1 ENG OF BOOSTER AND COMPRESSOR(HP) FOR EVIDENCE OF OIL PER AMM 72-May 8, 2019 · N283JB · Emb ERJ190100IGWSDR YENA201905080265Ecs · contaminatedFLT 1500, HAV-FLL. ON DESCENT CREW REPORTED DIRTY SOCK SMELL FOR ABOUT 10 MINUTES. SMELL WAS MORE PRONOUNCED IN THE REAR OF THE AIRCRAFT REPEAT GRIPE; ACCOMPLISHED W/O# 993523 AND NR 1 AND NR 2 ENGINE WASH. "COMPLIED WITH INFO NOTICE 2017-T015D SECTION D (ECS May 8, 2019 · N827JB · Airbus A320232SDR HALA2019050900230Warning System · false activationETOPS SIGNIFICANT SYSTEM - AT TOP OF DESCENT LOW FLOW ALERT IN LDCMR. AT GATE PERFORMED TSM 21-21-00-810-852-A. OPS CHECKED GOOD. MSG IN LDCRM CLEARED. OK FOR SERVICEMay 8, 2019 · N380HA · Airbus A330243SDR HNAA2019050900138Unknown · odorPDIS 658 21-01 1880552 08MAY19 PHL CLOSE BURNING SMELL IN GALLEY 28786 00 AR FACT 08MAY19 04:04 PHL REMOVED ACCESS PANELS 223ELW, 223UZ, 224MZ TO FOM. INSPECTED COMPARTMENTS NO FEFECTS NOTED AT THIS TIME AND REINSTALLED PANELS 223ELW, 223UZ 224MMay 8, 2019 · N658AE · Emb EMB145LRSDR GTIA2019050803335Unknown · odorPASSING APPROXIMATELY 12000 FT MSL IN DESCENT, THRUST AT OR NEAR IDLE, FA'S IN AFT GALLEY REPORTED A "DIRTY SOCK" ODOR. FLIGHT CREW APPLIED PROCEDURES ( X BLEED SHUT, PACK 2 OFF) & ODOR DISSIPATEED WITHIN MINUTES. ( PACKS WITH MOD 31283/MP P7125 (FWC H2-F1 STNMay 8, 2019 · N695NK · Airbus A320232SDR GTIA2019050803332Unknown · odorCABIN CREW REPORTED STRONG ELECTRICAL ODOR IN ENTIRE CABIN ON SHORT FINAL ODOR WENT AWAY AFTER LANDING. ACCOMPLISHED TSM 71-00-00-810-801-A RAN BOTH ENGINES AND BOTH PACKS INDIVIDUALLY NO ODORS PRESENT OR DETECTED AIRCRAFT OK FOR SERVICE.May 8, 2019 · N612NK · Airbus A320232SDR YENA201905070264Unknown · odorFLT 1499, FLL-HAV. FLIGHT ATTENDANTS REPORTED A SOUR MILK DIRTY SOCK ODOR DURING THE LAST 25 MINUTES OF FLIGHT. THE ODOR PERSISTED THROUGH OUT THE ENTIRE CABIN AND WAS ALSO REPORTED BY PASSENGERS TOO. IN THE COCKPIT; COMPLIED WITH INFORMATION NOTICE 2017-T015DMay 7, 2019 · N827JB · Airbus A320232SDR RAIA201905060001Duct · disconnectedRETURNED FROM FLIGHT. COCKPIT TEMP REACHED 37 DEGREES CELSIUS. FOUND COCKPIT DISTRIBUTION DUCT DISCONNECTED AT THREE POINTS. INSTALLED BLANKET COVERS AND RECONNECTED DUCTS. OPS CHECK GOOD.May 6, 2019 · N21144 · Emb EMB145XRSDR RAIA201905050001Unknown · odorBURING SMELL IN COCKPIT (MX REPORTS SMELL OF CHLORINE). RAN HYD, PACKS, ELECTRICAL, PANELS WHILE IN FTL DECK. NO SMOKE OR BURING SMELL FOUND. CLEANER IS NOTED BY MULTIPLE MX. A/C OK FOR SERVICE.May 5, 2019 · N11106 · Emb EMB145XRSDR CA190507011Elbow · detached(CAN) IN CRUISE AT FL390 AN ACM (AIR CYCLE MACHINE) OVERHEAT ANNUNCIATION FOLLOWED BY AND EMERG PRESS ANNUNCIATION OCCURRED. CREW FOLLOWED THE ABNORMAL CHECK LIST AND RETURNED TO HOME BASE. THERE WAS NO LOSS OF CABIN PRESSURE JUST THE NOISE OF THE EMERGENCY PRMay 4, 2019 · Cessna 560CESSNASDR AALA201905069031Unknown · odorAIRCRAFT WAS GROUNDED: PILOT REPORTS SOF (CABIN ODOR) EVENT DURING DECENT, APPROACH AND LANDING. MAINTENANCE ACCOMPLISHED CARDS 33L00021001, 33L0071001 AND 33L00021002. ACCOMPLISHED SOF TROUBLESHOOTING, ENGINE CABIN ODOR TROUBLESHOOTING AND ECS CONTAMINATION CMay 4, 2019 · N284AY · Airbus A330243SDR AALA201905069002Duct · disconnectedAIRCRAFT WAS GROUNDED: PILOT REPORTS DURING DESCENT, THE FLOW LIGHT CAME ON, CABIN STARTED CLIMBING AT OVER 1000 FT/MIN. THE AFT GALLEY DOOR LIGHT CAME ON, THE AIRCRAFT STARTED VIBRATING EXCESSIVELY AND THE CABIN ALTITUDE WENT UP 9500 FEET. FLIGHT ATTENDANT HMay 4, 2019 · N9677W · Doug MD83SDR GTIA2019050403327Unknown · odorFA REPOTS BURNING / SMOKE ODOR IN AFT GALLEY -DEBREIFED FA IN AFT GALLEY THAY REPORTED THE SMOKE SMELL WAS ONLY MOMENTARY AND DISSAPPEARED IN REF TSM 05-50-00. RAN PACKS NO SMELL NOTED . AC GOOD FOR CONTINUED SVC.May 4, 2019 · N904NK · Airbus A320271NSDR GTIA2019050403326Unknown · odorDESCENDING THROUGH 250, FA REPORTED VOMIT SMELL AT REAR OF AC ( ROWS 30-35). NO PAX IN THE AREA WERE SICK. TURNED PACK 2 OFF AND SMELL WENT AWAY. PACK 2 REMAINED OFF FOR REMAINDER OF FLIGHT. PERFORMED CABIN INSPECTION FOR ODORS, NO DEFECTS FOUND UNABLE TO REPRMay 4, 2019 · N677NK · Airbus A321231SDR UIEA2019050504131Unknown · odorDURING TO AND INITIAL CLIMB PACKS EMITTED A "WET SOCKS" ODOR. SUSPECT AEROSOLIZED ENGINE OIL INTO BLEED SYSTEM(<P>PERFORMED OPS CHECK OF PACK SYSTEM IN HOT AND COLD. NO SMELL NOTED AND OPS CHECK GOOD. REF AMM 21-51-00 </P>)May 4, 2019 · N1229A · Boeing 767306SDR HALA2019050600218Unknown · odorSUP - FLIGHT ATTENDANT REPORT MUSTY SMELL IN CABIN. T/S PER TSM 21-00-00-810-801-A. APU COMPARTMENT AND SURROUNDING AREA SHOWS NO SIGN OF OIL LEAKAGE. REMOVED BLEED AIR DUCT, NO SIGNS OF OIL IN DUCTING OR APU TURBINE SECTION. APU OIL LEVEL OK. RAN APU AND PACKMay 3, 2019 · N399HA · Airbus A330243SDR YENA201905030260Unknown · odorFLT 660, PHL-BOS. ON TAKE OFF FROM PHL HAD ODOR OF "DIRTY SOCKS". MODERATE INTENSITY TRANSIENT ODOR CLEARED WITHIN APPROX 5 MINUTES ODOR DETECTED IN FLIGHT DECK SOURCE WAS AIR VENTS; COMPLIED WITH INFORMATION NOTICE 2017-T015C SECTION A DETERMINED TO BE A LEVEMay 3, 2019 · N283JB · Emb ERJ190100IGWSDR QMLA2019050319045Unknown · odorAFTER TAKE OFF, THE CREW AND PILOT NOTICED AN INEXPLICABLE HEAT RADIATING THROUGH THE AIRCRAFT ACCOMPANIED BY A SMELL OF BURNING PLASTIC. HEATER, AIR CONDITIONER AND DEMISTER WERE IN THE OFF POSITION. WE WERE ONLY A FEW MILES AWAY FROM BASE AND RETURNED TO BASMay 3, 2019 · N383AM · Bell 407SDR YENA201905030257Ecs · contaminatedFLT 320, SLC-FLL. ON FINAL APPROACH STRONG DIRTY SOCK ODOR APPROX 5000 FT UNTIL TOUCHDOWN; ACCOMPLISHED ECS SYS DECONTAMINATION PER AMM 21-00-00 AND PERFORMED ENGINE RUNS. ISOLATED EACH BLEED SYS AND NO ODOR DETECTED.May 3, 2019 · N504JB · Airbus A320232SDR GTIA2019050303322Unknown · odorFLIGHT ATTENDANT REPORTS FAINT GASOLINE TYPE ODOR ISOLATED TO ROW 25-27 ONLY. NO ODOR ELSEWHERE IN AC. POSSIBLY SOMETHING FROM A PAX-PERFORMED TSM 05-50-00-810-931A AND FOUND NO ODOR PRESENT AT THIS TIME. AIRCRAFT IS OK FOR CONTINUED SERVICE.May 3, 2019 · N687NK · Airbus A321231SDR GTIA2019050303321Ecs · contaminatedFUME EVENT REPORTED BY F/A IN CLIMB SMELL CONTINUED AFTER PACK 2 SHUT DOWN. PERFORM DECONTAMINATION OF THE ENVIROMENTAL CONTROL SYSTEM (ECS) IAW AMM 21-00-00-615-001 AND AMM 21-00-00-615-003.May 3, 2019 · N660NK · Airbus A321231SDR GTIA2019050203318Unknown · odorSUSPECTED FUME EVENT DESCENDING THROUGH 10,000FT-ACCOMPLISHED FAULT ISOLATION IAW TSM 05-50-00-810-831 COS REPORTING SHEET POSSIBLE SUSPECTED NR 1 PACK & NR 1 ENG. NO ABNORMAL OIL CONSUMPTION OR EXTERNAL LEAKS NOTED. UTILIZED AEROTRACER TO ISOLATE CAUSE OF ODEMay 2, 2019 · N533NK · Airbus A319132SDR ANCF2019050101Flapper Valve · missingMAY 1. AIR INLET CHECK VALVE 2150HH FLAPPER MISSING // CORRECTIVE ACTIONS: MAY 1. THIS ITEM IS DEFERRED TO W.O 2249638 IN ACCORDANCE WITH MEL 21-26-05 PROV 2 CAT "C" MAINTENANCE PROCEDURES WERE PERFORMED N805AV-CNMCC-2019-AV0352 // MAY 02. IN ACCORDANCE WITH AMay 1, 2019 · N805AV · Airbus A321231SDR GTIA2019050103317Unknown · odorFUME EVENT COULD NOT ISOLATE -RAN BOTH ENGINES AND APU IAW AMM 71-00-00 AND AMM 49-00-00. TROUBLSHOT CABIN ODORS PER TSM 05-50-00-810-831-A WHILE RUNNING ENGINES AND APU ISOLATING NR 1 ENG BLEED AND APU BLEED AND PACK SYSTEMS 1 & 2. WERE UNABLE TO DUPLICATE ORMay 1, 2019 · N632NK · Airbus A320232SDR GTIA2019050103316Unknown · odorMUSKY ODOR IN COCKPIT AS WELL AS REPORTED BY, I/A @ AROUND ROW 4, AND 18 ( APU SYSTEM )--May 1, 2019 · N604NK · Airbus A320232SDR GTIA2019050103315Ecs · contaminatedTHROUGH 12,000 FT DIRTY SOCK ODOR PERSISTED UNTIL AFTER LANDING. QRM PROCEDURE WAS COMPLIED WITH TO NO AVAIL PACK 1 OFF OR PACK 2 OFF DID NOT MAKE SMELL GO AWAY-PERFORMED DECONTAMINATION OF THE ECS WITH NR 1 AND NR 2 ENG. IAW AMM 21-00-00. OPS CHECK GOOD. NO OMay 1, 2019 · N604NK · Airbus A320232SDR IPXA2019050141640Unknown · odorINSPECTION TYPE:N/A LIGHT DIRTY SOCK SMELL FROM RIGHT PACK WITH ENGINES RUNNING. RAN LEFT AND RIGHT ENG SEPERATE WITH RT PACK ON ONLY, NO SMELLS NOTED, SMALL APPEARS INTERMITTENT, REF FIM 21-00-01 PB 301. AIRCRAFT OK FOR CONTINUED SERVICE.May 1, 2019 · N414UP · Boeing 75724APFSDR YENA201904300253Unknown · odorFLT 2824, MEX-MCO. ON DESCENT AT APPROX 6000 TO SURFACE AT IDLE PWR. STRONG "DIRTY SOCK" SMELL OBSERVED. THROAT AND LUNG IRRITATION NOTED; COMPLIED WITH INFORMATION NOTICE 2017-T015D SECTION A. AIRCRAFT IS OK FOR SERVICE. DETERMINED TO BE LEVEL 1 CONDITION.Apr 30, 2019 · N632JB · Airbus A320232SDR QMLA2019043019044Evaporator · malfunctionedCREW SMELLED BURNING ELECTRICAL SMELL IN COCKPIT. TURNED OFF AC AND OTHER UNNECESSARY CONSUMERS. SMELL SOMEWHAT DISSIPATED AND WE MADE A PRECAUTIONARY LANDING AT OUR COMPANY OTHER BASE AS WAS CLOSEST AND BEST OPTION. LANDED SAFELY. UPON POST FLIGHT, FOUND THATApr 30, 2019 · N133HN · Urocop EC130B4SDR AALA201905019031Unknown · odorAIRCRAFT WAS GROUNDED: REPORTS OF FUMES, CABIN ODOR. MAINTENANCE RAN ENGINES AT IDLE AND FLIGHT IDLE, RAN RIGHT PACK WITH ONE AIR SOURCE AT A TIME INITIONALLY HAD A OILY MUSTY SMELL AFT OF MID GALLEY IT DISAPATED QUICKLY, RAN LEFT PACK WITH ONE AIR SOURCE AT AApr 29, 2019 · N284AY · Airbus A330243SDR AALA2019043099034Unknown · odorAIRCRAFT WAS GROUNDED: PILOT REPORTS DIVERTED TO TPA ON ACCOUNT OF BURNING ELECTRICAL ODOR NOTICED IN THE VICINITY OF THE 2R JUMPSEAT IN THE CABIN. EMERGENCY DECLARED. LANDED WITHOUT INCIDENT. MAINTENANCE ACCOMPLISHED CARD 05-96-70, ALONG WITH ATBT OF IFE SYApr 29, 2019 · N162AA · Airbus A321231SDR GTIA2019042983311Unknown · odorFUME EVENT AFTER T/O TURNED OFF PACK 2 AFTER PACK 2 WAS TURNED OFF SMELL DISAPATED ( PACKS A320 WITH MOD 31283/MP P7125 (FWC H2-F1 STND) AND WITH MOD. 30626/MP K6443 (ENHANCED ECS) - FAULT CAUTIONS ASSOCIATED WITH OPERATIVE SIDE NOT DISPLAYED )-INSPECTED APU CApr 28, 2019 · N615NK · Airbus A320232SDR GTIA2019042983310Unknown · odorFA REPORTED CABIN FUME EVENT DURING CRUISE. SUSPECTED PACK 2. ( PACKS A319 WITH MOD 31283/MP P7125 (FWC H2-F1 STND) AND WITH MOD. 30626/MP K6443 (ENHANCED ECS) - AT OR BELOW FL 370 )--Apr 28, 2019 · N509NK · Airbus A319132SDR CA190430015Check Valve · failed(CAN) WHEN CARRYING OUT A SCHEDULED TASK CARD RIL-2018-03, THE INNER CHECK VALVE AT FIN 6454 HB WAS REMOVED TO FIND THAT BOTH BUTTERFLY FLAPS WERE MISSING. AS IT WAS A SCHEDULE TASK FOR THIS EXACT PROBLEM, I BORESCOPED THE DUCTING DOWNSTREAM OF THE VALVE TO ENApr 27, 2019 · Aerosp ATR42300SDR AALA2019043099010Unknown · odorAIRCRAFT WAS GROUNDED: FLIGHT ATTENDANTS REPORT AN ELECTRICAL SMELL COMING FROM COFFEE MAKERS 17 AND 18. MAINTENANCE ACCOMLISHED CARD 05-96-70. NO ELECTRICAL SMELL DETECTED. REPLACED COFFEE MAKERS 17 & 18. OK FOR SERVICE.Apr 27, 2019 · N786AN · Boeing 777223SDR AALA201904299008Filter · dirtyAIRCRAFT NOT GROUNDED: PILOT REPORTS DIRTY SOCK SMELL IN COCKPIT AND CABIN FROM AIR CONDITIONING. MAINTENANCE REPLACED LOWER RECIRCULATION AIR FILTERS IAW AMM 21-25-08. NO SMELL NOTED DURING AIR CONDITION OPERATION.Apr 27, 2019 · N735AT · Boeing 777323ER
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