JASC 7921

Service difficulty reports · 981

Reports filed under 7921 · Engine Oil Cooler, newest first.

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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 = '7921'
  ORDER BY difficulty_date DESC"

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SDR A6WA202609028910Heat Exchanger · faultedDURING CLIMB NR 2 ENG OIL TEMP REACHED 150'C. C/W QRH -PULLED PWR BACK AND REDUCED PWR. ENG OIL TEMP RETURNED TO NORMAL OPERATING RANGE. NR 2 ENG OIL TEMP CONSTANTLY 20' HOTTER THAN NR 1. MC- ON GRD @ IDLE READS 10-15' HOTTER THAN NR 1. AIRCRAFT REMOVED FROMSep 2, 2026 · N420AW · Cndair CL6002B19SDR UIEA2026080700685Heat Exchanger · faultedENG 2 OIL TEMP EICAS MSG. FL 380 MAX OIL TEMP APPROX 194. ENG 2 SHUT DOWN. PERFORMED FIM 79-00, FT FIG 109. R & R FUEL/OIL HEAT EXCHANGER IAW AMM 79-21-01-404-014-J00, OPS CHECK & LEAK CHECKED GOOD. RUN ENG NR 2 AT DIFFERENT POWER SETTINGS AND OIL TEMP NORMAAug 7, 2026 · N408MC · Boeing 74747UFSDR CALA2026071617838Transmitter · faultedOIL FILTER BYPASS MESSAGE SHOWS ON ENGINE DISPLAY ENG 1 AFTER STARTUP. MESSAGE DISSAPEARED. MESSAGE REAPPEARED AFTER TAKE OFF. DIVERTED TO CVG. C/W EEC BITE FIM 73-00 TASK 801 & FOUND NO RECENT FAULTS. REMOVED & INSPECTED SCAVENGE FILTER PER MEL 7902A & AMJul 14, 2026 · N76522 · Boeing 737824SDR DALA2026060503403Oil Cooler · odorCREW REPORTED EXHAUST ODOR IN AFT CABIN ON TAKEOFF AND TOP OF DESCENT. EMERGENCY DECLARED DURING APPROACH. ROAD TRIP. REPLACED AIR/OIL COOLER. (LP 8075720, 1628492 - AIRCRAFT WAS GROUNDED)Jun 4, 2026 · N689DL · Boeing 757232SDR DALA2026041702451Heat Exchanger · leakingDIVERTED TO HND FOR LEFT ENGINE OIL QUANTITY DECREASED TO ZERO WITH STABLE TEMPERATURE AND PRESSURE. RIGHT ENGINE ALSO HAD OIL QUANTITY DECREASING WITH STABLE TEMPERATURE AND PRESSURE. REPLACED BOTH LEFT AND RIGHT ENGINE AIR OIL HEAT EXCHANGER FOR LEAKING.(8Apr 15, 2026 · N178DN · Boeing 767332SDR AALA202601163763Indicator · faultyAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: LOW OIL QUANTITY INDICATION ON THE NUMBER 2 ENGINE, WITH ERRATIC LOW OIL PRESSURE ENTERING THE AMBER RANGE. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT IAH. REMOVED AND REPLACED NUMBER 2 ENGINE CLOGGING INJan 15, 2026 · N934NN · Boeing 737823SDR AALA202601066384Lubrication Unit · leakingAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING CRUISE NEAR TOP OF DECENT AT FL210, #1 ENGINE OIL QUANTITY INDICATED 0, SHUTDOWN NUMBER 1 ENGINE. AIRCRAFT EMERGENCY LANDED SAFELY AT OMA. **SUPPLEMENTAL REPORT FOR (AALA202512196384) SUBMITTED 12Dec 18, 2025 · N301NW · Boeing 737823SDR AALA202601063655Scavenge Pump · leakingAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING CRUISE NEAR TOP OF DECENT AT FL210, #1 ENGINE OIL QUANTITY INDICATED 0, SHUTDOWN NUMBER 1 ENGINE. AIRCRAFT EMERGENCY LANDED SAFELY AT OMA. **SUPPLEMENTAL REPORT FOR (AALA202512196384) SUBMITTED 12Dec 18, 2025 · N301NW · Boeing 737823SDR 2025FA0000408Oil Cooler · crackedWHILE PERFORMING AN OIL CHANGE, IT WAS DISCOVERED THE DIAGONAL STIFFENERS ON BOTH SIDES OF THE OIL COOLER WERE BROKEN AND HALF GONE. THE OIL COOLER WAS NOT LEAKING. THE OIL COOLER WAS REPLACED WITH NEW. INSTALLED PART NUMBER: 658767, SERIAL NUMBER: H22-12342-2Jun 18, 2025 · N603DK · Cirrus SR22SDR CALA2025042104036Heat Exchanger · faulted#2 FUEL/OIL COOLER NEEDS REPLACED AS PRECAUTIONARY MEASURE DUE TO FUEL ODOR IN DRAINED IDG OIL. STARTED TO DISCONNECT THE FUEL/OIL COOLER REF AMM 79-21-01 UP TO STEP G. REMOVED #2 ENGINE FUEL/ OIL COOLER REF AMM 79-21-01. INSTALLED NEW ENG 2 FUEL/OIL COOLER TApr 18, 2025 · N782UA · Boeing 777222SDR AALA202504011909Heater · failedAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: NUMBER 1 ENGINE FAIL (COMPRESSOR STALL), ENGINE 1 SHUTDOWN BY CREW IN DESCENT; AIRCRAFT DIVERTED TO AND LANDED SAFELY AT MIA. **SUPPLEMENTAL REPORT FOR (AALA202503240627): REMOVED AND REPLACED HMU-HYDROMMar 21, 2025 · N970NN · Boeing 737823SDR 2025F00008Exchanger · leakingON FLIGHT ENGINE OIL CONSUMPTION HIGHJan 2, 2025 · N368AR · Boeing 73786JSDR MTNA20241212002Oil Cooler · crackedDURING DECENT OF FLIGHT 7553 DLH-MSP WITH AIRCRAFT N914FX, THE CAPTAIN REPORTED THE NUMBER TWO OIL PRESSURE GAUGE WAS FLUCTUATING BETWEEN 0-20 PSI AND LOW OIL PRESSURE WAS INDICATED ON THE CAP. THE FLIGHT CREW PERFORMED THE #2 ENGINE SHUT DOWN PROCEDURES, AN EDec 12, 2024 · N914FX · Aerosp ATR42300SDR HALA20241209352Heat Exchanger · leakingETOPS - DURING PDSC, NOTED OIL COATING #2 ENG FROM HEAT EXCHANGER AREA & OIL LEVEL AT -2. FILLED OIL & RAN #2 ENG @ IDLE FOR 5 MINS. DISCOVERED SIGNIFICANT OIL LEAK FROM HEAT EXCHANGER MATRIX. REMOVED & REPLACED #2 ENG AOHE PER AMM 79-21-51. OPS & LEAK CHECK GDec 7, 2024 · N392HA · Airbus A330243SDR QMLA2024081220097Oil Cooler · failedDURING TAKEOFF AND INITIAL CLIMB FROM KFMM, THE ENGINE OIL TEMPERATURE EXCEEDED ITS MAXIMUM LIMIT OF 107°C, REACHING A PEAK OF 116°C. THE EXCEEDANCE WAS IDENTIFIED SHORTLY AFTER TAKEOFF, PRIOR TO TRANSITIONING TO CRUISE FLIGHT. UPON OBSERVING THE ABNORMAL TEMAug 8, 2024 · N370AM · Bell 407SDR NACA2024060300001Valve · failedFOUND THE L ENG EEC MSG. REPLACED #1 ENG AIR/OIL HEAT EXCHANGER VALVE IAW AMM 79-21-09Jun 3, 2024 · N563NC · Boeing 7673BGSDR GRTA20240307001Heat Exchanger · leakingWHILE FLYING AT FL 320 #2 RIGHT SIDE ENGINE LOST OIL PRESSURE INSTANTLY. REQUESTED DIVERT TO KHSV. ON LANDING NOTED OIL DRIPPING FROM BOTTOM OF COWLING. MX FOUND THE OIL COOLERS WELD SEAM SPLIT OPEN (CRACKED). REPLACED OIL COOLER.Mar 6, 2024 · N531AW · Beech B300SDR M3XA20231216002Bypass Valve · unserviceablePILOT REPORTED #1 ENGINE OIL TEMPERATURE EXCEEDANCE OF 129.5. PLACED THE #1 ENGINE TO IDLE AND EXECUTED A SUCCESSFUL PRECAUTIONARY LANDING WITH A PATIENT ON BOARD TO KROA AIRPORT. THE PATIENT WAS TRANSPORTED BY GROUND. THE MECHANIC REPLACED THE #1 ENGINE OIDec 16, 2023 · N135WL · Urocop EC135P2SDR ASAA2022121841193Oil Cooler · crackedFOUND CRACK ON #1 ENGINE SURFACE AIR OIL COOLER LH. GROUNDED - YES. REMOVED AND REPLACED #1 ENG SACOC REF B737-9 AMM 79-21-02.Dec 18, 2022 · N977AK · Boeing 7379SDR GTIA2022111836780Oil Cooler · fault messageAFTER TAKEOFF AT ABOUT 600FT ON CLIMBOUT THE #2 ENG ADVISORY OIL AT 5.5 PULSED ONCE WE LEVELED OFF AT 5000 FT OIL QT ROSE TO 9.0 QT ONCE WE ACCELERATED OIL 9QT DROPPED AND PULSED BACK TO 6.0 QT ON DESCENT TO LAND IT ROSE TO 10 QT AND ONCE ON TAXI IT ROSE TO 15Nov 15, 2022 · N644NK · Airbus A320232SDR CALA2022102802987Oil Filter · cloggedENG OIL FILTER BYPASS SCREEN. TOMC CONTACTED AND WERE ADVICED TO PERFORM REQUIRED INSPECTIONS BEFORE CREATING DIP IRW STEP 5.G.(7).(H).(1), AS WELL AS, REQUESTED INSPECTION OF OIL FILTER FOR DEBRIS. DEBRIEF OF CREW TOLD WAS #2 ENGINE FOLLOWED FIM 79-05 TASK 81Oct 28, 2022 · N69818 · Boeing 737924ERSDR CALA2022100702740Chip Detector · fodNO OIL QTY RED OIL PRESS 11 NORMAL LANDING WINDMILL 15 MINUTES FOUND WET AND FINGER TIGHT LOOSE AFT BEARING OIL SUPPLY LINE R+R #1 ENGINE OIL SUPPLY FILTER PER AMM 79-21-03. NO METAL OR REMOVED AND INSPECTED #1 ENGINE MAG CHIP DETECTORS. NO METALLIC REMOVED ANOct 7, 2022 · N39297 · Boeing 737824SDR YENA2022090500869Chip Detector · false indicationFLT#20, LHR-JFK. (ETOPS) 'ETOPS GROUND VERIFICATION REQUIRED DUE TO CHIP DETECTION MSG ON ENG 2; ENG #2 GROUND VERIFICATION ACCOMPLISHED REF LOG PAGE 3521797, ITEM #1 (HIG POWER ASSURANCE TEST COMPLETED ALL ENG PARAMETERS NORMAL AND FAULTS NOT PRESENT. REF AMMSep 4, 2022 · N4048J · Airbus A321271NSDR I5PA2022081668804Scavenge Pump · faultyL ENG TAIL PIPE FIRE. R/R SCAVENGE PUMP PER AMM 79-21-04.Aug 16, 2022 · N688SL · Boeing 757230SDR 2022FA0000361Oil Cooler · crackedORIGINAL OIL COOLER REPLACED 05/27/2022 DUE TO CRACKED MOUNTING FLANGES. NEW COOLER, S/N 4467 , FAILED AFTER 12 HOURS IN SERVICE, CRACKED ADJACENT TO TOP FITTING BOSS, RESULTING IN 5+ QUART OIL LOSS DURING FLIGHT, AND EMERGENCY LANDING. INSTALLED REPLACEMENTJul 20, 2022 · Piper PA18SDR CALA2022071801809Line · leakingFL360 CLMB-LOW OIL QTY R ENG-FLWD BY R ENG OIL PRESS LT-THEN PRESS INTO RED BND. LEAKED DURING ENGINE RUN.REPLACED OIL LINE. RAN ENGINE AT IDLE POWER AND OBSERVED NO OIL LEAKS. QUANTY AND PRESSURE REMAIN STEADY WITH NO LOSS OF QUANTY OR ACFT OK FOR SVC .Jul 18, 2022 · N12114 · Boeing 757224SDR CALA2022062901607Lubrication Unit · faultyFLIGHT CREW REPORTED OIL FILTER BYPASS ILLUMINATED IN FLIGHT FOR #1 ENGINE PERFORMS FIM 79-05 TASK 817 , NO FAULTS SHOWN ON EEC BITE, #1 ENG BYPASS LIGHT AT CRUISE, CREW FOLLOW POCEDURE PERFORMED FMC CDU BITE NO FAULTS NOTED FILTER BY PASS STATUS THROTTLE BACKJun 29, 2022 · N68453 · Boeing 737924ERSDR A6WA202206088189Oil System · warning messageAT CRUISE AT FL280, RECEIVED RT ENG OIL PSI WARNING MESSAGE. OIL PSI WAS FLUCTUATING IN THE GREEN BAND. C/W QRH. REDUCED POWER TO IDLE. DIVERTED TO ICT. AROUND 8,000FT, OIL PSI WENT INTO THE RED AND REMAINED THERE FOR THE REST OF THE FLIGHT. SHUT ENGINE DJun 8, 2022 · N444ZW · Cndair CL6002B19SDR AALA202205106206Oil Cooler · defectiveAIRCRAFT WAS GROUNDED: #1 ENGINE OIL QUANTITY WENT TO 2.5. ALL OTHER PARAMETERS NORMAL. THEN DROPPED TO 2.0 AND SLOWLY LOST OIL PRESSURE. WENT TO 68 PSI AIRCRAFT DIVERTED TO DFW. KEPT ENGINE RUNNING ALL PARAMETERS EXCEPT OIL QUANTITY AND PRESSURE STAYED NORMay 6, 2022 · N536UW · Airbus A300*SDR NACA2022050500001None · noneDURING ENGINE #2 BORESCOPE INSPECTION FOUND FUEL PUMP LEAKING. (FUEL IN AND FUEL OUT PORTS) REMOVED AND REPLACED FUEL/OIL HEAT EXCHANGER GASKETS IAW B767 AMM 79-21-01, PERFORMED ENGINE GROUND TEST - IDLE POWER OPS AND LEAK CHECK GOOD PER AMM 71-00-00May 5, 2022 · N379CX · Boeing 767323SDR HALA2022050300097None · noneETOPS - #1 ENG OIL LEAK AT 6 O'CLOCK POSITION UNDER GAS GENERATOR FAIRINGS // PERFORMED ENG RUN LEAK CHK, FOUND TEE FITTING AND OPPSITE SIDE OF LINES LEAKING. ITEMS 100 AND 500 REF ROLLSROYCE IPC 79-22-49-08. 05/02/22 2020495. REPLACED 2 P/N AS43013-12 O-RINGSMay 2, 2022 · N390HA · Airbus A330243SDR A6WA202204308176None · noneRIGHT ENGINE OIL PRESSURE WENT TO 0 PSI DURING DECENT PLUS RIGHT ENGINE PRESSURE WARN. RAN QRH. RIGHT ENGINE FAILED SHORTLY AFTER WHILE RUNNING SINGLE ENGINE QRH. AFTER OIL WARNING, RAN QRH, AFTER APPROXIMATELY 3 MINUTES ENGINE SHUT DOWN WITH VIBE ON OWN ****AApr 30, 2022 · N408AW · Cndair CL6002B19SDR WX0A1900010074058Lubrication Unit · oil consumption1 WHILE REACHING 10,000 ' WE GOT A ENG # 2 ECAM ADVISORY OIL QUANTITY (3.5) WE FOLLOWED THE ADVISORY CHECK LIST AND INDICATION BECAME DOUBLE XX AMBER 2 ABOUT 3 MINUTES LATER WE GOT ENG # 2 ECAM ADVISORY PSI (DROP) 3 IT FOLLOWED BE AN ECAM ENG # 2 OIL LOW PRESSApr 8, 2022 · N223NV · Airbus A320214SDR CALA2022011800170Filter · warning messageOIL FILTER BYPASS LGT ILUMM ON TAKEOFF ROLL EXTINGUISHED IN AIR CREW REPORTS #2 ENGINE FOR #2 ENGINE FOUND FILTER BYPASS INDICATOR POPPED, REMOVED PHOTOS ATTACHED PERFORMED FIM TASK 79-05 TASK817 UP TO STEP 3 B 1 " CHIP SCAVENGE FILTER AND SUPPLY FILTER AND Jan 17, 2022 · N57439 · Boeing 737900SDR 2022F00068Heat Exchanger · leakingFUEL LEAK AT RIGHT ENGINE OIL/FUEL HEAT EXCHANGER DRAIN AND FUEL SERVO, DURING TRANSIT CHECK, IT WAS DETECTED A FUEL LEAK AT RIGHT ENGINE. MAINTENANCE PERSONNEL PERFORMED REVISION AT RIGHT ENGINE, DETECTING FUEL LEAK OUT OF LIMITS FROM MAIN OIL / FUEL HEAT EXCJan 3, 2022 · Boeing 737800*SDR A6WA202112017999None · noneON TAKE-OFF REC'D RT ENG OIL WARNING MESSAGE. MESSAGE WAS INTERMITTENT. OIL PSI FLUCTUATED BETWEEN 25 AND 35 PSI. OIL TEMP WAS NORMAL. MESSAGE WAS LESS INTERMITTENT WITH REDUCED POWER. EVENT DESCRIPTION: EN ROUTE, THE #2 ENGINE OIL PRESSURE BEGAN TO Nov 30, 2021 · N420AW · Cndair CL6002B19SDR CALA2021111102092None · leakingREF LOG PAGE 7405211. FOUND #1 ENG AIR/OIL HEAT EXCHANGER LEAKING EXTERNALLY FROM WITHIN THE COOLING FINS, REF PICTURES. REMOVED #1 ENG AIR/OIL HEAT EXCHANGER REF MM 79-21-08. OLD PART STORED ON A CART BELOW ENGINE WITH HARDWARE. ADD EMP:U121006 REPLACED #1 ENNov 11, 2021 · N773UA · Boeing 777222SDR 2021F00257Heat Exchanger · leakingOIL LEAK BY LEFT ENGINE HEAT EXCHANGER OIL FUEL, DURING OVERNIGHT CHECK AT MEX STATION, DUE TO LEFT ENGINE OPERATIONAL TEST, IT WAS DETECTED AN OIL LEAK BY LEFT ENGINE HEAT EXCHANGER OIL FUEL. MAINTENANCE PERSONNEL PERFORMED REVISION, DETECTING AN OIL LEAK BY Sep 20, 2021 · Boeing 737800*SDR GTIA2021092135999None · noneCAPTAIN REPORT FUEL LEAKING FROM #1 ENG , FUEL LEAK INCREASE ON DESCENT-REMOVED FCOC REPLACED PACKING AND REINSTALLED FCOC OPS AND LEAK CHECK GOOD IAW AMM 79-21-43 NK2224 DUE 2/22 NK1926 DUE 2/22Sep 18, 2021 · N663NK · Airbus A321231SDR 2021FA0000285Heat Exchanger · damagedRIGHT ENGINE FUEL LEAK OF HEAT EXCHANGER OIL-FUEL DRAIN, DURING TRANSIT CHECK, IT WAS DETECTED A FUEL LEAK AT RIGHT ENGINE. MAINTENANCE PERSONNEL PERFORMED REVISION, DETECTING THE RIGHT ENGINE FUEL LEAK OF HEAT EXCHANGER OIL-FUEL DRAIN; RH ENGINE HEAT EXCHANGESep 13, 2021 · N116BG · Cessna 310SDR ASMF202110001Lubrication Unit · failedAIRCRAFT RETURNED OF FLIGHT DUE TO DURING CLIMB, THE RIGHT ENGINE PRESENTED LOW OIL PRESSURE AND QUANTITY; SO FLIGHT CREW IMMEDIATELY PERFORMED THE RIGHT ENGINE SHUTDOWN. MAINTENANCE PERSONNEL PERFORMED REVISION TO RIGHT ENGINE, DETECTING THE LUBRICATION UNIT Jun 27, 2021 · N875AM · Boeing 737852SDR ASMF2021F00108Lubrication Unit · faulted28.06.2021 14:32 ENG 2 SHUTDOWN ON FLIGHT DUE LOW OIL PRESSURE AND QUANTITY. AIRCRAFT RETURNED OF FLIGHT DUE TO DURING CLIMB, THE RIGHT ENGINE PRESENTED LOW OIL PRESSURE AND QUANTITY; SO FLIGHT CREW IMMEDIATELY PERFORMED THE RIGHT ENGINE SHUTDOWN. MAINTENANCEJun 27, 2021 · N875AM · Boeing 737800*SDR HALA2021051100061Igniter · faultedETOPS - ENG START 2 FAULT. ENG 2 IGN A FAULT. SUCCESSFUL AUTOSTART AFTER SECOND ATTEMPT. BTB// REMOVED AND REPLACED IGN PER AMM 74-21-01-00-801-A ON #2 ENG. OPS CHECK GOOD. OK TO CONTINUEMay 7, 2021 · N202HA · Airbus A321271NSDR HALA2021021600019Oil Cooler · defectiveETOPS - ON PDC, FOUND #1 ENG AIR/OIL HEAT EXCHANGE 4073265 LEAKING OIL INTERNALLY. // REMOVED #1 ENG AIR/OIL HEAT EXCHANGER PER AMM 79-21-51-000-803-A 13 FEB 2021 INSTALLED #1 ENG AIR OIL HEAT EXCHANGER PER AMM 79-21-51. OPS CHECK AND LEAK CHECK GOOD. COOLER, Feb 13, 2021 · N375HA · Airbus A330243SDR M3XA20201019006Bypass Valve · failedPILOT PERFORMED A PL WITH A PATIENT ON BOARD AND REPORTED NR 2 ENGINE OIL TEMPERATURE ABOVE NORMAL LIMITS IN FLIGHT, PEAKED AT 134 DEGREES. MECHANIC INSPECTED ENGINE CHIP DETECTORS, DRAINED AND RESERVICED ENGINE OIL AND REPLACED NR 2 ENGINE OIL BYPASS VALVE. Oct 19, 2020 · N836CS · Urocop EC135P2SDR MK1Y20200407010Oil Cooler · crackedDURING MAINTENENCE FOUND DEFORMATION WITH CRACK 0.78" ON AIR/OIL COOLER P/N 35E38-5 AFT UPPER AREA.Apr 7, 2020 · N153DL · Boeing 7673P6SDR ASAA2020030932355Heat Exchanger · leakingON WALKAROUND FOUND FUEL LEAKING FROM #2 ENG BOTTOM DRAIN MAST AREA. GROUNDED - YES. RAN #2 ENG AND ACCOMPLISHED B737-900 AMM 71-71-00-200-801-F00, ENG VENTS AND DRAINS INSPECTION FOUND FUEL DRIP FROM MAIN OIL/FUEL HEAT EXCHANGER AND DRAIN TUBE, WITHIN LIMITS Mar 4, 2020 · N468AS · Boeing 737990ERSDR HALA2019121000511Warning Message · false activationETOPS SIGNIFICANT SYSTEM - ENG 2 AIR EX-CHANGER FAULT. // PERFORMED TSM TASK 79-20-00-810-810-A. BITE CHECK OF FADEC SYSTEM INDICATED NO FAULTS. PERFORMED GVI OF AIR/ OIL HEAT EX-CHANGER FOR DAMAGE. NON FOUND. OPERATED VALVE AND FOUND MOVEMENT IS FREE AND Dec 9, 2019 · N374HA · Airbus A330243SDR ASAA2019111211285Cooler · leakingFOLLOW-UP TO #2 IDG FREQUENT SERVICING. GROUNDED - YES. ACCOMPLISHED STEPS 1-3 AND FOUND #2 IDG AIR/OIL COOLER LEAKING, REMOVED AND REPLACED #2 IDG AIR/OIL COOLER PER B737-900 AMM 24-11-21 LEAK CHECKS GOOD,NO OTHER DEFECTS NOTED-ETOPS SIGNIFICANT SYSTEM, GROUNNov 11, 2019 · N442AS · Boeing 737990ERSDR HALA2019102100431Oil Cooler · leakingETOPS SIGNIFICANT SYSTEM - L/H ENG FUEL LEAK FROM DRAIN MAST VSVA/TCC EGR 10 MINS C/O LEAK INCREASED FROM 12DPM TO 50DPM IAW TASK 71-71-00-200-805A PT 1-8. 1 TSM TASK 71-00-00-810-914-A C/O LEAK ISOLATED TO AOHE CONFIRMED BEYOND DISPATCH LIMITS OF AMM 71-71-0Oct 16, 2019 · N391HA · Airbus A330243
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