GE CFM56 series

Service difficulty reports · 5,028

Newest first. General aviation reporting is voluntary.

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 engine_model_key = 'CFM56'
  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 99UAL900362Fuse · failedCREW REPORTS RIGHT BRAKE INEFFECTIVE, IF BOTH BRAKES USED AIRCRAFT PULLS TO THE LEFT. *SD* REPLACED BRAKE FUSE PER APPPLICABLE AIRCRAFT MAINTENANCE MANUAL 32-41-72. BLED BRAKE SYSTEM AFTER FUSE REPLACEMENT. OPERATIONAL CHECK OF SYSTEM OK.Jul 9, 1999 · N928UA · Boeing 737522 · Landing Gear Brake SystemSDR 99UAL900369Trans Rectifier · failedA STRONG ELECTRICAL ODOR IN THE CABIN WAS REPORTED BY A FLIGHT ATTENDANT. *S/D* TRANSFORMER RECTIFIER POWER SUPPLY FAILED. REPLACED TRANSFORMER RECTIFIER IN NR 2 POSITION. ALSO, R4 RELAY WAS REPLACED DUE TO ZERO VOLTAGE BETWEEN B1 AND B2. AIRCRAFT CHECKS Jul 9, 1999 · N956UA · Boeing 737522 · DC Rectifier/ConverterSDR 99UAL900359Gearbox Elbow · brokenLANDED SFO UNDER AMBER ALERT DUE TO AN OIL LOSS INDICATION FOR THE NR 2 ENGINE. AFTER INSPECTION, FOUND THE OIL PRESSURE ELBOW FITTING CRACKED TO THE TRANSFER GEARBOX PRESSURE TRANSMITTER. AFTER REPLACING THE GEARBOX ELBOW, ACCOMPLISHED LEAK CHECK RUN AND REJul 6, 1999 · N386UA · Boeing 737322 · Engine Oil PressureSDR 99UAL900358Eis Display · failedABORTED TAKEOFF AT 95 KNOTS DUE TO A HIGH EGT INDICATION ON THE NR 1 ENGINE. TROUBLESHOOTING CONFIRMED EGT INDICATION WAS FLUCTUATING BETWEEN 850-970 DEGS. THE PRIMARY EIS DISPLAY UNIT WAS REPLACED. AIRCRAFT WAS RETURNED TO SERVICE WITH NO FURTHER ANOMALIESJul 4, 1999 · N946UA · Boeing 737522 · Engine EGT/TIT Indicating SystemSDR 99UAL900334Coalescer Bag · contaminatedEXPERIENCED SMOKE IN CABIN. *S/D* POSSIBLE COALESCER BAG FAILURE. REPLACED BOTH COALESCER BAGS AND CHANGED THE RECIRCULATION FAN AND EQUIPMENT COOLING FAN BLOWER AS PRECAUTIONARY. EXTENSIVE INSPECTION OF E & E BAY, CABIN LIGHTING, SIDE AND OVERHEAD PANELS Jun 22, 1999 · N312UA · Boeing 737322 · Humidity Control SystemSDR 99UAL900317Fuel · leakingFLUID LEAKING FROM NUMBER 2 PYLON AREA, OVER THE LEADING EDGE OF THE WING. FUEL AND HYDRAULIC QUANTITY NORMAL. UPON ARRIVAL, FOUND NO APPARENT FLUID LEAKS. REMOVED PANEL, FOUND NO LEAKS IN PYLON. RAN FLAPS AND ENGINE, NO LEAKS WERE DETECTED.Jun 10, 1999 · N367UA · Boeing 737322 · Fuel StorageSDR 99UAL900313Overheat Loop · malfunctionedLEFT WING TO BODY OVERHEAT LIGHT ILLUMINATED. *S/D* A/C DESCENDED TO FL240, AND OVERHEAT LIGHT EXTINGUISHED AFTER APPROX 9 MIN. A/C LANDED WITHOUT INCIDENT. TROUBLESHOOTING WITH M237 COMPARTMENT OVERHEAT MODULE ISOLATED KEEL BEAM OVERHEAT LOOPS M272 AND M2Jun 8, 1999 · N394UA · Boeing 737322 · Overheat DetectionSDR 99UAL900306Controller · failedTHE RIGHT PRESSURIZATION PACK CIRCUIT BREAKER TRIPPED. *S/D* FAILURE OF THE RIGHT PACK RAM AIR CONTROLLER AND SENSOR. REPLACED BOTH THE RAM AIR TEMPERATURE SENSOR AND RAM AIR CONTROLLER.Jun 4, 1999 · N302UA · Boeing 737322 · Cabin Cooling SystemSDR 99UAL900307Pcu · failedRUDDER CONTROL BECAME ERRATIC. *S/D* REPLACED THE RUDDER POWER CONTROL UNIT (PCU). ALSO, ACCOMPLISHED A CHECK OF THE FORCES REQUIRED TO MOVE THE STANDBY RUDDER ACTUATOR INPUT FORCES PER MM 27-21-00-101. INPUT FORCES WERE WITHIN LIMITS AND NO FAULTS WERE FOJun 3, 1999 · N343UA · Boeing 737322 · Rudder Control SystemSDR 99UAL900303Overheat Det · shortedTHE FIRE WARNING FOR THE APU ILLUMINATED. *S/D* CLIMBING THROUGH 10,000 FT, APU FIRE LIGHT ILLUMINATED ON P8-1 PANEL. FLT CREW DISCHARGED APU FIRE BOTTLE AND THE A/C LANDED WITHOUT INCIDENT. VISUALLY INSPECTED APU AND FOUND NO SIGNS OF FIRE, FLUID LEAKS, OJun 2, 1999 · N947UA · Boeing 737522 · Overheat DetectionSDR 99UAL900295Pack · failedTHE RIGHT SIDE PRESSURIZATION PACK TRIPPED OFF AND THE AIRCRAFT CABIN ALTITUDE RAPIDLY INCREASED. *S/D* FOUND RIGHT PACK TURBOFAN MAKING LOUD NOISE. REPLACED RIGHT PACK TURBOFAN. REF MRR 99UAL900306 FOR SUBSEQUENT MAINTENANCE ACTIONS.May 30, 1999 · N302UA · Boeing 737322 · Cabin Cooling SystemSDR 99UAL900288Wire · chafedACCUMULATION OF SMOKE IN THE FLIGHT DECK. *S/D* WIRE W276-090-14 WAS FOUND CHAFED AGAINST BRACKET 65-55704-4, LOCATED ABOVE THE P6-1 LOAD CONTROL PANEL. DAMAGE THE RESULT OF INADEQUATE BUNDLE CLEARANCE FOLLOWING PREVIOUS SHEET METAL REPAIR. WIRE REPAIRED AMay 21, 1999 · N349UA · Boeing 737322 · Electrical Power System WiringSDR 99UAL900290Sensor · out of adjustFORWARD ENTRY DOOR WARNING LIGHT ILLUMINATED. *S/D* PROXIMITY SENSOR TARGET OUT OF ADJUSTMENT. ADJUSTED PROXIMITY SENSOR TARGET, OPS CHECK OK.May 21, 1999 · N920UA · Boeing 737522 · Door Warning SystemSDR 99UAL900285Control Panel · malfunctionedUNABLE TO MAINTAIN PRESSURIZATION. *S/D* LEFT AIR CONDITIONING PACK TRIPPED OFF FOLLOWED BY THE RIGHT PACK TRIPPED OFF AND WOULD NOT RESET. ADJUSTED LEFT RAM AIR EXHAUST LOUVERS. REPLACED AIR CONDITIONING ACCESSORY UNIT, OVERHEAD CONTROL PANEL AND CABIN TEMay 19, 1999 · N302UA · Boeing 737322 · Cabin Cooling SystemSDR 99UAL900283Relay · inoperativeUNSAFE GEAR DOWN INDICATION. *S/D* NO GEAR DOWN INDICATION WITH GEAR EXTENDED. REPLACED THE LANDING GEAR AIR/GROUND RELAY AND LIGHTS CIRCUIT BREAKER ITEM C404 ON THE P6-3 PANEL, OPS CHECK OK.May 18, 1999 · N904UA · Boeing 737522 · Landing Gear Position and WarningSDR 99UAL900271Sensor · failedEXHAUST FAN INOP. *S/D* EQUIPMENT COOLING LOW FLOW SENSOR FAILED. REPLACED EQUIPMENT COOLING LOW FLOW SENSOR, OPS CHECK OK.May 13, 1999 · N345UA · Boeing 737322 · Air Distribution SystemSDR 99UAL900272Sensor · failedEQUIPMENT COOLING EXHAUST FAN INOP. *S/D* EQUIPMENT COOLING LOW FLOW SENSOR FAILED. REPLACED EQUIPMENT COOLING LOW FLOW SENSOR, OPS CHECK OK.May 13, 1999 · N323UA · Boeing 737322 · Air Distribution SystemSDR SWAA990847Hmu · malfunctionedTRIED TO SET CLIMB POWER, (CDU N1 LIMIT 99.5 PERCENT) NR 1 ENG GOT A STRONG AIRFRAME VIBRATION ANYTIME PWR WAS ADVANCED PAST 93 PERCENT N1, NO MOVEMENT IN EITHER VIBRATION GAUGE. INSPECTED AIRCRAFT, AND NO DEFECTS NOTED. REMOVED AND REPLACED HMU, LKS AND OPSMay 9, 1999 · N708SW · Boeing 7377H4 · Fuel Controlling SystemSDR 99UAL900258Relay · failedNOSE GEAR UNSAFE LIGHT ILLUMINATED. *S/D* FAULTY NOSE GEAR LATCHING RELAY. REPLACED NOSE GEAR LATCHING RELAY ITEM R374. OPS CHECK OK.May 3, 1999 · N388UA · Boeing 737322 · Landing Gear Position and WarningSDR 99UAL900253Packing · leaking'A' HYDRAULIC SYSTEM LOW PRESSURE LIGHT ILLUMINATED AND QUANTITY DROPPED ONE QUARTER. *S/D* REPLACED PACKING ON PRESSURE MODULE, SERVICED HYDRAULIC SYSTEM 'A'. TESTED FLIGHT CONTROLS AND NUMBER 1 ENGINE. NO LEAKS NOTED, OPS CHECK OK.May 2, 1999 · N324UA · Boeing 737322 · Hydraulic System, MainSDR 99UAL900246Temp Sensor · failedNR 2 ENGINE OIL TEMPERATURE INDICATION WAS FLUCTUATING FROM 100 DEGREES UP INTO THE RED BAND INTERMITTENTLY. ALL OTHER ENGINE PARAMETERS WERE NORMAL. *S/D* ACCOMPLISHED MM TROUBLESHOOTING. REPLACED TEMP BULB PER MM 79-34-01. ENGINE LEAK CHECK ACCOMPLISHEDApr 29, 1999 · N361UA · Boeing 737322 · Engine Oil TemperatureSDR 99UAL900400Fuel Control · malfunctionedASYMMETRICAL THRUST PROBLEM. ENGINE NR 1 WOULD NOT PRODUCE THRUST ABOVE 51 PERCENT N1. ATC WAS NOTIFIED OF POSSIBLE PROBLEM AND FIRE AND RESCUE WAS REQUESTED TO BE ON STANDBY. *S/D* REPLACED THE MAIN ENGINE CONTROL. AIRCRAFT RETURNED TO SERVICE. NO FURTHApr 27, 1999 · N364UA · Boeing 737322 · Fuel Control/Turbine EnginesSDR 99UAL900232Adc · failedALL ALTIMETERS AND AIRSPEED INDICATORS DISAGREE IN FLIGHT. *S/D* FAULTY AIR DATA COMPUTER. THE NR 2 AIR DATA COMPUTER WAS REPLACED, OPS CHECK OK.Apr 25, 1999 · N956UA · Boeing 737522 · Air Data ComputerSDR 99UAL900234Mec · malfunctionedNR 2 ENGINE SURGED. *S/D* ACCOMPLISHED MM TROUBLESHOOTING AND REPLACED MAIN ENGINE CONTROL UNIT (MEC). AIRCRAFT RETURNED TO SERVICE AND NO FURTHER DISCREPANCIES NOTED.Apr 24, 1999 · N344UA · Boeing 737322 · Fuel Control/Turbine EnginesSDR 99UAL900231Bearing · wornSIGNIFICANT AIRFRAME VIBRATION FELT IN CONTROLS, FLOOR, AND GLARESHIELD. *S/D* THE VIBRATION WAS CAUSED BY A WORN BEARING AND BUSHINGS ON THE LEFT HAND ELEVATOR TAB INBOARD HINGE. THE WORN PARTS WERE REPLACED. OPS CHECK OK.Apr 23, 1999 · N342UA · Boeing 737322 · Elevator, Tab StructureSDR 99UAL900233Valve · failedAIRCRAFT HAD AN UNCONTROLLED LOSS OF PRESSURE IN AUTO. THE OXYGEN MASKS WERE NOT DEPLOYED. *S/D* AFTER EXTENSIVE TROUBLESHOOTING, FOUND DELTA P MODULE LOOSE AT MOUNTING BRACKET, RIGHT HAND PACK VALVE BIASED TO THE CLOSED POSITION, AND LOW RESISTANCE TO THE Apr 23, 1999 · N955UA · Boeing 737522 · Cabin Cooling SystemSDR 99UAL900226Selector Panel · malfunctionedUNABLE TO MAINTAIN CABIN ALTITUDE. *S/D* DELTA P MODULE FASTENER LOOSE AND NOT COMPLETELY CONNECTED, AND RIGHT HAND PACK VALVE BIASED TO THE CLOSED POSITION, AND AFT OUTFLOW VALVE HAD LOW RESISTANCE. REPLACED THE CABIN ALTITUDE INDICATOR AND THE CABIN PRESSApr 22, 1999 · N955UA · Boeing 737522 · Cabin Pressure IndicatorSDR 99UAL900237Blkhd Fasteners · looseWATER LEAK AT PRESSURE BULKHEAD ABOVE APU GENERATOR FEED CABLES. *S/D* UPON INSPECTION AND DISASSEMBLY IT WAS FOUND THAT THE HI-LOKS ATTACHING THE AFT END OF STRINGER 2A RIGHT TO THE BS 1016 FRAME SUPPORT STRUCTURE (69-41417-1) WERE ATTACHED WITH SELF LOCKINApr 22, 1999 · N354UA · Boeing 737322 · Fuselage Main, BulkheadSDR 99UAL900227Switch · failedELECTRIC STABILIZER TRIM IS INOP. FOUND THAT FLAP UPLIMIT SWITCH (S245) HAD A FAILED RESISTANCE (68+) WHEN MEASURED BETWEEN D4514P PINS 32 AND 34. THE SWITCH WAS REPLACED. LATER TROUBLESHOOTING FOLLOWING ANOTHER WRITE-UP FOR INOP STABILIZER TRIM FOUND THAT Apr 21, 1999 · N930UA · Boeing 737522 · Stabilizer Control SystemSDR 99UAL900214Yaw Damper · malfunctionedIN CRUISE, FL 310 AND ON 'B' SYSTEM HYDRAULICS. WITHOUT WARNING, THE AIRCRAFT ROLLED HARD LEFT AT APPROXIMATELY A 20-30 DEGREE BANK. BOTH PILOTS GRABBED THE CONTROLS AND ROLLED AIRCRAFT UPRIGHT. ACCOMPLISHED TESTS OF THE YAW DAMPER SYSTEM, SPOILER SYSTEM, Apr 13, 1999 · N394UA · Boeing 737322 · Autopilot SystemSDR 99UAL900202Coupler · failedUNEXPLAINED YAW FELT BY CREW ON FLIGHT DECK. YAW DAMPER COUPLER BITE TEST WAS PERFORMED BUT NO FAILURES WERE FOUND. REPLACED THE YAW DAMPER COUPLER PER MM 22-12-31 AS PRECAUTION. A BENCH TEST ON THE REPLACED COUPLER DETERMINED THAT THE TRANSISTOR (Q11) IN TApr 10, 1999 · N387UA · Boeing 737322 · Autopilot SystemSDR 99UAL900203Acm · failedAIRCRAFT WOULD NOT PRESSURIZE. FOUND RIGHT PACK AIR CYCLE MACHINE SEIZED. REPLACED RIGHT AIR CYCLE MACHINE. OPS CHECK OK.Apr 10, 1999 · N921UA · Boeing 737522 · Cabin Cooling SystemSDR 99UAL900204Union · leakingPARTIAL LOSS OF 'B' SYSTEM HYDRAULIC FLUID. *S/D* FOUND LEAK AT UNION ON MAINTENANCE VALVE IN LEFT SIDE OF TAIL. REPLACED PACKING, SERVICED B HYDRAULIC SYSTEM. LEAK CHECKED SYSTEM. NO LEAK NOTED, CHECKED OK.Apr 10, 1999 · N356UA · Boeing 737322 · Hydraulic System, MainSDR SWAA990675Hmu · contaminatedINFLIGHT SHUT DOWN, NR 2 ENGINE ROLLED BACK AT 31,000 FEET AND 87 PERCENT N1, WINDMILLED AND APU RESTART UNSUCCESSFUL AT 25,000 FEET, 280 KNOTS. APU RESTARTED AT 19,000 FEET 280 KNOTS, ENGINE RAN FOR APPROXIMATE 20 MINUTES AND ROLLED BACK AGAIN AT 12,000 FEETApr 10, 1999 · N701GS · Boeing 7377H4 · Fuel Controlling SystemSDR 99UAL900201Relay · failedLOST ALL INSTRUMENT SYSTEM POWER ON CAPTAIN'S SIDE OF FLIGHT DECK AND THE POWER FOR THE CABIN PRESSURE CONTROLLER. *S/D* MAINTENANCE REPLACED R3 TRANSFER RELAY AND NR 1 TRANSFORMER RECTIFIER, OPS CHECK OK.Apr 9, 1999 · N335UA · Boeing 737322 · AC Power Distribution SystemSDR 99UAL900199Fuel Pump · looseRIGHT ENGINE FUEL LEAK. *S/D* THE MAIN FUEL PUMP FILTER COVER WAS PULLED BACK FROM THE HOUSING. FOUR OF THE SIX FUEL FILTER COVER ATTACH BOLTS WERE FOUND BACKED FROM THE PUMP HOUSING. RIGHT ENGINE WAS REPLACED, OPS CHECK OK.Apr 8, 1999 · N908UA · Boeing 737522 · Engine Fuel PumpSDR 99UAL900184Mechanism · not latchedABORTED TAKEOFF AT 120 KTS DUE TO DOOR 1L WARNING LIGHT. *S/D* CHECKED OPERATION OF DOOR LIGHTS, OPERATES NORMAL.Mar 31, 1999 · N396UA · Boeing 737322 · Passenger/Crew DoorsSDR 99UAL900175Fire Warning · malfunctionedABORTED TAKEOFF OF 100 KNOTS DUE TO A FALSE ENGINE FIRE WARNING INDICATION. *S/D* REPLACED ENGINE AND APU FIRE DETECTION ACCESSORY UNIT (M279). OPS CHECK OK.Mar 25, 1999 · N389UA · Boeing 737322 · Fire DetectionSDR 99UAL900157Seal · leakingFUEL LEAKING OUT OF DRAIN. *S/D* FUEL LEAKAGE FOUND AT NUMBER 1 ENGINE LEFT VSV ACTUATOR SEAL AND SHROUD DRAIN WITH ENGINE OFF. THE VARIABLE STATOR VANE (VSV) ACTUATOR SEALS SOMETIMES TAKE A STATIC SET CAUSING SLIGHT LEAKAGE BETWEEN THE ACTUATOR PISTON AND Mar 15, 1999 · N339UA · Boeing 737322 · Compressor Bleed ControlSDR 99UAL900158Vsv · out of adjustLEFT ENGINE EXPERIENCED POWER SURGES. *S/D* ACCOMPLISHED ENGINE BORESCOPE AND TROUBLESHOOTING FOUND VARIABLE STATOR VANES (VSV) OUT OF RIG, NO LIMITING DEFECTS NOTED IN GAS PATH AND VSV'S WERE PROPERLY RIGGED PER MAINTENANCE MANUAL. OPS CHECK OK.Mar 14, 1999 · N956UA · Boeing 737522 · Compressor Bleed ControlSDR 99UAL900151Relay · failedEXPERIENCED ELECTRICAL FAILURES STARTING WITH FLIGHT RECORDER OFF LIGHT, ACARS, GPWS YAW DAMPENER, CAPTAIN'S HSI AND ADI. NR 1 AC BUS POPPED AFTER LANDING. *S/D* FAULTY R3 (NR 1 TRANSFER BUS) RELAY, REPLACED R3 RELAY. OPS CHECK OK.Mar 11, 1999 · N391UA · Boeing 737322 · AC Power Distribution SystemSDR SWAA990485Blades · fodDURING POST FLIGHT, FOUND DAMAGE ON NR 1 ENGINE FAN BLADES AND INLET LINING. REMOVED AND REPLACED FAN BLADE KIT PER MM.Mar 9, 1999 · N658SW · Boeing 7373L9 · Turbine Engine Compressor SectionSDR SWAA990455Bearing · leakingAIR TURNBACK DUE TO CABIN FILLED WITH SMOKE AFTER TAKEOFF. FOUND NR 3 BEARING LEAKING OIL ON NR 2 ENGINE. REMOVED AND REPLACED ENGINE PER MM.Mar 4, 1999 · N384SW · Boeing 7373H4 · Turbine Engine Compressor SectionSDR SWAA990450Blade · dentedDURING SCHEDULED C3 CHECK, FOUND RT ENGINE NR 31 FAN BLADE HAS DENT AT MIDSPAN FILLET RADIUS. REMOVED AND REPLACED NR 31 FAN BLADE PER MM.Mar 3, 1999 · N315SW · Boeing 7373H4 · Turbine Engine Compressor SectionSDR SWAA990433Connector · dirtyDURING SERVICE CHECK CHECK, FOUND FLOOR TRACK LIGHTING OUT ON MID CABIN. CLEANED AND RESEATED SOCKET CONNECTORS PER MM.Mar 2, 1999 · N390SW · Boeing 7373H4 · Emergency LightingSDR 99UAL900133Outflow Valve · failedAIRCRAFT DID NOT PRESSURIZE. *S/D* FORWARD OUTFLOW VALVE WAS STICKING OPEN. REPLACED FORWARD OUTFLOW VALVE, OPS CHECK OK.Mar 1, 1999 · N928UA · Boeing 737522 · Pressure Regulator/Outflow ValveSDR SWAA990395Skin · crackedDURING SCHEDULED A2 CHECK, FOUND CRACK INDICATION AT 4 FASTENER HOLES, FS 757 BELOW ST 4R. REPAIRED SKIN PER SRM.Feb 28, 1999 · Boeing 7372H4 · Fuselage Main, Plate/SkinSDR SWAA990378Blade · damagedAT FL 310, FELT AND HEARD A LOUD THUMP, NOTED CHANGE IN NR 1 ENG N2 AND FUEL FLOW INCREASE. ENG VIBRATION MON ROSE TO PLUS 4. PERFORMED CHECKLIST, RAN ON REDUCED POWER. VIBRATION CONTINUED TO SHUTDOWN AT GATE. INSPECTED AND FOUND ICE DAMAGE TO C1 FAN. REPFeb 25, 1999 · N313SW · Boeing 7373H4 · Turbine Engine Compressor SectionSDR 99UAL900117Switch · failedLANDING GEAR UNSAFE LIGHT ILLUMINATED. *S/D* REPLACED LEFT MAIN LANDING GEAR UPLOCK SWITCH PER MM 32-61-21 AND WDM32-64-01. PERFORMED OPS CK. FOUND OK PER MM 32-61-21.Feb 20, 1999 · N397UA · Boeing 737322 · Landing Gear Position and WarningSDR 99UAL900118Engine · bird strikeSLIGHT ELECTRICAL ODOR IN CABIN. *S/D* THERE WAS A BIRD STRIKE DOWN CORE OF NR 2 ENGINE. THE ENGINE WAS BORESCOPED AND NO DAMAGE REPORTED. REPLACED COALESCER BAGS AND NO OTHER ABNORMAL SMELLS WERE NOTED.Feb 20, 1999 · N925UA · Boeing 737522 · Engine (Turbine/Turboprop)
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