N521UW

Service difficulty reports · 175

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. 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 n_number = 'N521UW' AND registry_match = 'registration'
  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 AALA202607066735Handle · looseAIRCRAFT WAS NOT GROUNDED: LEVER TO ARM DOOR 3L IS LOOSE. MAINTENANCE TIGHTENED LOOSE DOOR ARMED LEVER HANDLE ON 3L PER AMM 52-22-11.Jul 2, 2026 · N521UW · Airbus A321231 · Emergency ExitsSDR AALA202606045473Battery · no testAIRCRAFT WAS NOT GROUNDED: FLASHLIGHT AT 4R IS INOPERATIVE. MAINTENANCE REPLACED FLASHLIGHT BATTERY PER AMM 25-60-00.Jun 2, 2026 · N521UW · Airbus A321231 · Emergency EquipmentSDR AALA202605136039Contact · burnedAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED INTO ORD DUE TO THE FLIGHT CREW REPORTING THAT THE NR 1 GENERATOR FAILED DURING FLIGHT. THE AIRCRAFT LANDED SAFELY AT ORD AND WAS TOWED TO THE GATE. MAINTENANCE FOUND #1 IDG CONNECTOR 400VC1 AND 400VC1A HAD May 12, 2026 · N521UW · Airbus A321231 · Electrical Power System WiringSDR AALA202605111815Battery · no testAIRCRAFT WAS NOT GROUNDED: FAULT MESSAGE FOR AFT LEFT EMERGENCY POWER SUPPLY UNIT DISPLAYED DURING SYSTEM TEST. MAINTENANCE REPLACED THE EMERGENCY POWER SUPPLY UNIT (AALA202605090506) AND BATTERY (AALA202605116775) PER AMM 33-51-38. A SATISFACTORY OPERATIONAL May 9, 2026 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202605110506Power Supply · no testAIRCRAFT WAS NOT GROUNDED: FAULT MESSAGE FOR AFT LEFT EMERGENCY POWER SUPPLY UNIT DISPLAYED DURING SYSTEM TEST. MAINTENANCE REPLACED THE EMERGENCY POWER SUPPLY UNIT (AALA202605090506) AND BATTERY (AALA202605116775) PER AMM 33-51-38. A SATISFACTORY OPERATIONAL May 9, 2026 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202604305480Handle · looseAIRCRAFT WAS NOT GROUNDED: DOOR 3L HANDLE TO ARM THE SLIDE LOOSE. MAINTENANCE TIGHTENED ARM HANDLE ON 3L DOOR AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 52-22-22-400-001-A.Apr 28, 2026 · N521UW · Airbus A321231 · Emergency ExitsSDR AALA202603257841Bottle · low pressureAIRCRAFT IN BASE MAINTENANCE: L1 DOOR DAMPER AND EMERGENCY OPERATION CYLINDER PRESSURE LOW. SERVICED DOOR DAMPER AND EMERGENCY OPERATION CYLINDER PER AMM 52-10-00.Mar 24, 2026 · N521UW · Airbus A321231 · Passenger/Crew DoorsSDR AALA202603243406Handle · looseAIRCRAFT WAS NOT GROUNDED: DOOR 3R. SLIDE ARM HANDLE LOOSE. MAINTENANCE TIGHTENED HANDLE PER AMM 52-13-22.Mar 21, 2026 · N521UW · Airbus A321231 · Emergency ExitsSDR AALA202603036483Battery · no testAIRCRAFT WAS NOT GROUNDED: 4L FLIGHT ATTENDANT JUMPSEAT FLASHLIGHT BATTERY IS DEAD. FLIGHT ATTENDANT REPORTS SOMEONE LIKELY USED IT AND INSTALLED BACKWARDS WHICH PREVENTED CHARGING. MAINTENANCE REPLACED THE BATTERY AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CMar 2, 2026 · N521UW · Airbus A321231 · Emergency EquipmentSDR AALA202601044587Packing · leakingAIRCRAFT WAS GROUNDED: AIRCRAFT DIVERTED TO PHX DUE TO THE FLIGHT CREW REPORTING THAT DURING CLIMBOUT THERE WAS A STRONG ODOR OF CHEESE OR DIRTY SOCKS IN THE FLIGHT DECK AND THE ENTIRE CABIN. THE FLIGHT CREW LEVELED OFF AT 27, 000 BUT THE ODOR REMAINED. THE FLJan 1, 2026 · N521UW · Airbus A321231 · Air Distribution SystemSDR AALA202512155967Lever · looseAIRCRAFT WAS NOT GROUNDED: DOOR 3L ARMING LEVER COVER NOT SECURED. MAINTENANCE SECURED DOOR 3L ARMING LEVER PER AMM 25-60-00.Dec 11, 2025 · N521UW · Airbus A321231 · Emergency ExitsSDR AALA202510103967Apu · odorAIRCRAFT WAS GROUNDED: SOF EVENT AFTER TAKEOFF, THEN DISSIPATED MIC 1580902. MAINTENANCE DETERMINED APU WAS SOURCE OF ODOR AND REPLACED APU IAW J/C 26L31049003.Oct 6, 2025 · N521UW · Airbus A321231 · APU Core EngineSDR AALA202507031808Battery · no testAIRCRAFT WAS GROUNDED: BATTERY FAULT DISPLAYED FOR EMERGENCY POWER SUPPLY UNIT 13WL DURING SYSTEM TEST. REPLACED BATTERY AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-38.Jul 2, 2025 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202507036506Battery · no testAIRCRAFT WAS GROUNDED: BATTERY FAULT DISPLAYED FOR EMERGENCY POWER SUPPLY UNIT 12WL DURING SYSTEM TEST. REPLACED BATTERY AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-38.Jul 2, 2025 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202507036132Battery · no testAIRCRAFT WAS GROUNDED: BATTERY FAULT DISPLAYED FOR EMERGENCY POWER SUPPLY UNIT 11WL DURING SYSTEM TEST. REPLACED BATTERY AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-38.Jul 2, 2025 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202507022962Battery · no testAIRCRAFT WAS GROUNDED: FORWARD LEFT SLIDE IS FAILING THE EMERGENCY POWER SUPPLY UNIT SYSTEM TEST. MAINTENANCE REPLACED THE L1 DOOR SLIDE ASSEMBLY PER TASK CARD 26L00025010 (AALA202507025869). IN ADDITION MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 10WL (AJul 2, 2025 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202507023178Battery · no testAIRCRAFT WAS GROUNDED: FORWARD LEFT SLIDE IS FAILING THE EMERGENCY POWER SUPPLY UNIT SYSTEM TEST. MAINTENANCE REPLACED THE L1 DOOR SLIDE ASSEMBLY PER TASK CARD 26L00025010 (AALA202507025869). IN ADDITION MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 10WL (AJul 2, 2025 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202507029906Battery · no testAIRCRAFT WAS GROUNDED: FORWARD LEFT SLIDE IS FAILING THE EMERGENCY POWER SUPPLY UNIT SYSTEM TEST. MAINTENANCE REPLACED THE L1 DOOR SLIDE ASSEMBLY PER TASK CARD 26L00025010 (AALA202507025869). IN ADDITION MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 10WL (AJul 2, 2025 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202507027102Battery · no testAIRCRAFT WAS GROUNDED: FORWARD LEFT SLIDE IS FAILING THE EMERGENCY POWER SUPPLY UNIT SYSTEM TEST. MAINTENANCE REPLACED THE L1 DOOR SLIDE ASSEMBLY PER TASK CARD 26L00025010 (AALA202507025869). IN ADDITION MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 10WL (AJul 2, 2025 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202507020810Power Supply · no testAIRCRAFT WAS GROUNDED: FORWARD LEFT SLIDE IS FAILING THE EMERGENCY POWER SUPPLY UNIT SYSTEM TEST. MAINTENANCE REPLACED THE L1 DOOR SLIDE ASSEMBLY PER TASK CARD 26L00025010 (AALA202507025869). IN ADDITION MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 10WL (AJul 2, 2025 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202507025869Slide · no testAIRCRAFT WAS GROUNDED: FORWARD LEFT SLIDE IS FAILING THE EMERGENCY POWER SUPPLY UNIT SYSTEM TEST. MAINTENANCE REPLACED THE L1 DOOR SLIDE ASSEMBLY PER TASK CARD 26L00025010 (AALA202507025869). IN ADDITION MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 10WL (AJul 2, 2025 · N521UW · Airbus A321231 · Escape SlideSDR AALA202506239210Power Supply · no testAIRCRAFT WAS GROUNDED: FAULT MESSAGE DISPLAYED FOR EMERGENCY POWER SUPPLY UNIT 10WL DURING SYSTEM TEST. REPLACED EMERGENCY POWER SUPPLY UNIT AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-38.Jun 21, 2025 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202505194314Lock · stickingAIRCRAFT WAS NOT GROUNDED: AFT RIGHT LAVATORY E SLIDER LOCK IS STICKING BADLY/NOT WORKING AND TRAPPING PASSENGERS INSIDE LAVATORY. MAINTENANCE LUBRICATED THE LAVATORY DOOR LOCK AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 25-45-21.May 16, 2025 · N521UW · Airbus A321231 · Fixed Inner DoorsSDR AALA202408092506Control Unit · faultedAIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO PHL DUE TO THE FLIGHT CREW REPORTING AN LGCIU #1 FAULT, THE FLIGHT CREW ACCOMPLISHED QRH PROCEDURES AND BOTH GREEN DOWN AND LOCKED LIGHTS AND RED UNLOCKED LIGHTS REMAINED ON. THEAug 8, 2024 · N521UW · Airbus A321231 · Landing Gear SystemSDR AALA202407221587Hinge Arm · wornAIRCRAFT IN BASE MAINTENANCE: VERTICAL STABILIZER #3 RUDDER HINGE ARM UPPER AND LOWER FASTENER HOLE #1 ARE OBLONGED / WORN AT VERTICAL STABILIZER STATION 228 AND RIB 5. REPLACED HINGE ARM PER SRM 51-42-11 AND 55-36-42.Jul 20, 2024 · N521UW · Airbus A321231 · Vertical StabilizerSDR AALA202407221958Hinge Arm · wornAIRCRAFT IN BASE MAINTENANCE: VERTICAL STABILIZER #4 RUDDER HINGE ARM FASTENER HOLE #3 IS OBLONGED / WORN AT VERTICAL STABILIZER STATION 263 AND RIB 6. REPLACED HINGE ARM PER SRM 51-42-11 AND 55-36-42.Jul 20, 2024 · N521UW · Airbus A321231 · Vertical StabilizerSDR AALA202406206154Lever · looseAIRCRAFT WAS NOT GROUNDED: DOOR 3L ARMING LEVER LOOSE. RESECURED L3 ARMING GRIP HANDLE PER AMM 52-22-22.Jun 19, 2024 · N521UW · Airbus A321231 · Emergency ExitsSDR AALA202406102490Wire · damagedAIRCRAFT WAS NOT GROUNDED: UPON INSTALLATION OF THE TEMPERATURE SIMULATION DEVICES FOUND EMERGENCY LIGHT AT TEMPERATURE SENSOR 23HK WIRING TO BE DAMAGED AND DETACHED. REPLACED TERMINAL AT GROUND WIRE FOR EMERGENCY LIGHT 208WL.Jun 7, 2024 · N521UW · Airbus A321231 · Light System WiringSDR AALA202406033284Fitting · lack of lubeAIRCRAFT WAS NOT GROUNDED: FLIGHT ATTENDANT REPORTED DOOR 1L ARMING HANDLE FEELS LIKE IT'S BINDING WHEN ARMING AND DISARMING. CLEANED AND LUBED L1 DOOR GIRT BAR FITTING.May 31, 2024 · N521UW · Airbus A321231 · Emergency EquipmentSDR AALA2024051609862Slide · warning messageAIRCRAFT WAS GROUNDED: EMERGENCY POWER SUPPLY UNIT 10WL FAULT MESSAGE DISPLAYED DURING SYSTEM TEST. MAINTENANCE REPLACED THE R1 DOOR SLIDE AND ACCCOMPLISHED A SATISFACTORY OPERATIONAL CHECK OF THE EMEMRGENCY L;IGHTING SYSTEM WITH NO FAULTS NOTED.May 7, 2024 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202405139862Power Supply · faultedAIRCRAFT WAS GROUNDED: EMERGENCY POWER SUPPLY UNIT 10WL FAULT MESSAGE DISPLAYED DURING SYSTEM TEST. (OPEN)May 7, 2024 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202405101192Power Supply · defectiveAIRCRAFT WAS GROUNDED: NUMEROUS EMERGENCY LIGHTS IN CABIN ARE FLICKING. CEILING, SEAT ISLE AND DOOR EXIT LIGHTS. REPLACED EMERGENCY POWER SUPPLY UNIT 10WL (AALA202405101192) AND EMERGENCY LIGHT 204WL (AALA202405101918 ). A SATISFACTORY OPERATIONAL CHECK WAS ACMay 7, 2024 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202405101918Light · defectiveAIRCRAFT WAS GROUNDED: NUMEROUS EMERGENCY LIGHTS IN CABIN ARE FLICKING. CEILING, SEAT ISLE AND DOOR EXIT LIGHTS. REPLACED EMERGENCY POWER SUPPLY UNIT 10WL (AALA202405101192) AND EMERGENCY LIGHT 204WL (AALA202405101918 ). A SATISFACTORY OPERATIONAL CHECK WAS ACMay 7, 2024 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202404011205Battery · failedAIRCRAFT WAS NOT GROUNDED: CIDS 1 FAILED EMERGENCY POWER SUPPLY UNIT SYSTEM. REPLACED L1 EMERGENCY POWER SUPPLY UNIT BATTERY.Mar 30, 2024 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202403262736Solenoid · faultedAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO CLT. ON TAKEOFF ENGINES STABILIZED AT 1.05. WHEN FLEX THRUST, WAS APPLIED NUMBER 1 ENGINE LAGGED AND AFTER A SECOND OR TWO IT CAME UP AND MATCHED NUMBER 2. AT APPROXIMATELY 800 FEET,Mar 24, 2024 · N521UW · Airbus A321231 · Compressor Bleed ValveSDR AALA202403269219Eec · faultedAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO CLT. ON TAKEOFF ENGINES STABILIZED AT 1.05. WHEN FLEX THRUST, WAS APPLIED NUMBER 1 ENGINE LAGGED AND AFTER A SECOND OR TWO IT CAME UP AND MATCHED NUMBER 2. AT APPROXIMATELY 800 FEET,Mar 24, 2024 · N521UW · Airbus A321231 · Fuel Controlling SystemSDR AALA202208232549Actuator · noneAIRCRAFT WAS GROUNDED: DURING CLIMB AND CRUISE, TWICE THE AIRCRAFT HAD AN ABRUPT YAW TO THE LEFT AIRCRAFT ON AUTOPILOT #1. **SUPPLEMENTAL REPORT FOR AALA202207292549: MAINTENANCE REPLACED RUDDER YAW DAMPER SERVO ACTUATOR PER AMM 27-26-51. REPLACED RUDDER TRIM Jul 27, 2022 · N521UW · Airbus A300* · Rudder Control SystemSDR AALA202208233799Actuator · noneAIRCRAFT WAS GROUNDED: DURING CLIMB AND CRUISE, TWICE THE AIRCRAFT HAD AN ABRUPT YAW TO THE LEFT AIRCRAFT ON AUTOPILOT #1. **ORIGINAL REPORT WAS AALA202207292549** MAINTENANCE REPLACED RUDDER YAW DAMPER SERVO ACTUATOR PER AMM 27-26-51. REPLACED RUDDER TRIM ACTJul 27, 2022 · N521UW · Airbus A300* · Rudder Control SystemSDR AALA202208235283Computer · noneAIRCRAFT WAS GROUNDED: DURING CLIMB AND CRUISE, TWICE THE AIRCRAFT HAD AN ABRUPT YAW TO THE LEFT AIRCRAFT ON AUTOPILOT #1. **ORIGINAL REPORT WAS AALA202207292549** MAINTENANCE REPLACED RUDDER YAW DAMPER SERVO ACTUATOR PER AMM 27-26-51. REPLACED RUDDER TRIM ACTJul 27, 2022 · N521UW · Airbus A300* · Rudder Control SystemSDR AALA202207292549None · noneAIRCRAFT WAS GROUNDED: DURING CLIMB AND CRUISE, TWICE THE AIRCRAFT HAD AN ABRUPT YAW TO THE LEFT AIRCRAFT ON AUTOPILOT #1. **SUPPLEMENTAL REPORT WILL BE SUBMITTED** (OPEN)Jul 27, 2022 · N521UW · Airbus A300* · Rudder Control SystemSDR AALA202203187644Container · inoperativeAIRCRAFT WAS NOT GROUNDED: OXYGEN PANEL OVER SEATS 30 ABC DOES NOT OPERATE WHEN TESTED. REPLACED EMERGENCY OXYGEN CONTAINER AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 35-21-41.Mar 16, 2022 · N521UW · Airbus A300* · Passenger Oxygen SystemSDR AALA202202099275Check Valve · unserviceableAIRCRAFT WAS GROUNDED: YELLOW HYDRAULIC SYSTEM RESERVOIR OVERHEAT ECAM DURING CLIMB. FLIGHT DECLARED AN EMERGENCY AND RETURNED TO DFW, LANDING SAFELY. **ADDITIONAL SUPPLEMENTAL REPORT FOR AALA202202072812: REPLACED YELLOW HYDRAULIC SYSTEM ELECTRIC PUMP PER AMMFeb 6, 2022 · N521UW · Airbus A300* · Hydraulic Power SystemSDR AALA202202092812Pump · overheatedAIRCRAFT WAS GROUNDED: YELLOW HYDRAULIC SYSTEM RESERVOIR OVERHEAT ECAM DURING CLIMB. FLIGHT DECLARED AN EMERGENCY AND RETURNED TO DFW, LANDING SAFELY. **ADDITIONAL SUPPLEMENTAL REPORT FOR AALA202202072812: REPLACED YELLOW HYDRAULIC SYSTEM ELECTRIC PUMP PER AMMFeb 6, 2022 · N521UW · Airbus A300* · Hydraulic Pump (Electric/Engine), MainSDR AALA202202082812Pump · overheatedAIRCRAFT WAS GROUNDED: YELLOW HYDRAULIC SYSTEM RESERVOIR OVERHEAT ECAM DURING CLIMB. FLIGHT DECLARED AN EMERGENCY AND RETURNED TO DFW, LANDING SAFELY. **SUPPLEMENTAL REPORT FOR AALA202202072812: REPLACED YELLOW HYDRAULIC SYSTEM ELECTRIC PUMP PER AMM 29-24-51. Feb 6, 2022 · N521UW · Airbus A300* · Hydraulic Pump (Electric/Engine), MainSDR AALA202202072812None · noneAIRCRAFT WAS GROUNDED: YELLOW HYDRAULIC SYSTEM RESERVOIR OVERHEAT ECAM DURING CLIMB. FLIGHT DECLARED AN EMERGENCY AND RETURNED TO DFW, LANDING SAFELY. **SUPPLEMENTAL REPORT WILL BE SUBMITTED.** (OPEN)Feb 6, 2022 · N521UW · Airbus A300* · Hydraulic Pump (Electric/Engine), MainSDR AALA202112272575Control Valve · leakingAIRCRAFT WAS GROUNDED: ON PUSH BACK AFTER ENG #2 START, SET PARKING BREAK AND LOST ALL PARK BRAKE AND ACCUMULATOR PRESSURE TURNED ON Y PUMP THEN OFF AND LOST BRAKES AFTER ONE APPLICATION. REPLACED PARKING BRAKE CONTROL VALVE 102GG AND ACCOMPLISHED A SATISFACTODec 24, 2021 · N521UW · Airbus A300* · Landing Gear Brake SystemSDR AALA202108188236Battery Pack · dischargedAIRCRAFT WAS NOT GROUNDED: FORWARD EMERGENCY FLASHLIGHT SEAL BROKEN. REPLACED EMERGENCY FLASHLIGHT BATTERY AND TAMPER SEAL AS REQUIRED.Aug 18, 2021 · N521UW · Airbus A321231 · Emergency EquipmentSDR AALA202108021327Diaphragm · missingAIRCRAFT WAS NOT GROUNDED: FORWARD LEFT NUMBER 1 PASSENGER DOOR EMERGENCY OPERATION CYLINDER IS MISSING A DIAPHRAGM. REPLACED FORWARD LEFT NUMBER 1 PASSENGER DOOR EMERGENCY OPERATION CYLINDER DIAPHRAGM PER AMM 52-10-00.Jul 30, 2021 · N521UW · Airbus A321231 · Emergency EquipmentSDR AALA202105142266Power Supply · faultedAIRCRAFT IN BASE MAINTENANCE: EMERGENCY POWER SUPPLY UNIT 14WL IN PASSENGER CABIN FAULT. REPLACED POWER SUPPLY PER AMM 33-51-38-400-001-A .May 13, 2021 · N521UW · Airbus A321231 · Emergency LightingSDR AALA202105089012Support Angle · crackedAIRCRAFT IN BASE MAINTENANCE: CRACK HINGE ARM 4 ELEVATOR SUPPORT ANGLE RIGHT HORIZONTAL STABILIZER. INSTALLED NEW SUPPORT ANGLE LOCATED HINGE ARM 4 ELEVATOR RIGHT HORIZONTAL STABILIZER IAW A321 SRM 51-42-11-801 AND 51-72-00 AND AMM 55-16-42-400-001-A.May 7, 2021 · N521UW · Airbus A321231 · Elevator Structure
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