# Service difficulty reports: N521UW A list on [N521UW](https://openairdocs.org/aircraft/N521UW.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. Page 1 of 4 · 175 reports - [SDR AALA202607066735](https://openairdocs.org/sdr/AALA202607066735.md): Handle · loose · Jul 2, 2026 · N521UW · Airbus A321231 · Emergency Exits > AIRCRAFT WAS NOT GROUNDED: LEVER TO ARM DOOR 3L IS LOOSE. MAINTENANCE TIGHTENED LOOSE DOOR ARMED LEVER HANDLE ON 3L PER AMM 52-22-11. - [SDR AALA202606045473](https://openairdocs.org/sdr/AALA202606045473.md): Battery · no test · Jun 2, 2026 · N521UW · Airbus A321231 · Emergency Equipment > AIRCRAFT WAS NOT GROUNDED: FLASHLIGHT AT 4R IS INOPERATIVE. MAINTENANCE REPLACED FLASHLIGHT BATTERY PER AMM 25-60-00. - [SDR AALA202605136039](https://openairdocs.org/sdr/AALA202605136039.md): Contact · burned · May 12, 2026 · N521UW · Airbus A321231 · Electrical Power System Wiring > AIRCRAFT 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 - [SDR AALA202605111815](https://openairdocs.org/sdr/AALA202605111815.md): Battery · no test · May 9, 2026 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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 - [SDR AALA202605110506](https://openairdocs.org/sdr/AALA202605110506.md): Power Supply · no test · May 9, 2026 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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 - [SDR AALA202604305480](https://openairdocs.org/sdr/AALA202604305480.md): Handle · loose · Apr 28, 2026 · N521UW · Airbus A321231 · Emergency Exits > AIRCRAFT 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. - [SDR AALA202603257841](https://openairdocs.org/sdr/AALA202603257841.md): Bottle · low pressure · Mar 24, 2026 · N521UW · Airbus A321231 · Passenger/Crew Doors > AIRCRAFT IN BASE MAINTENANCE: L1 DOOR DAMPER AND EMERGENCY OPERATION CYLINDER PRESSURE LOW. SERVICED DOOR DAMPER AND EMERGENCY OPERATION CYLINDER PER AMM 52-10-00. - [SDR AALA202603243406](https://openairdocs.org/sdr/AALA202603243406.md): Handle · loose · Mar 21, 2026 · N521UW · Airbus A321231 · Emergency Exits > AIRCRAFT WAS NOT GROUNDED: DOOR 3R. SLIDE ARM HANDLE LOOSE. MAINTENANCE TIGHTENED HANDLE PER AMM 52-13-22. - [SDR AALA202603036483](https://openairdocs.org/sdr/AALA202603036483.md): Battery · no test · Mar 2, 2026 · N521UW · Airbus A321231 · Emergency Equipment > AIRCRAFT 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 C - [SDR AALA202601044587](https://openairdocs.org/sdr/AALA202601044587.md): Packing · leaking · Jan 1, 2026 · N521UW · Airbus A321231 · Air Distribution System > AIRCRAFT 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 FL - [SDR AALA202512155967](https://openairdocs.org/sdr/AALA202512155967.md): Lever · loose · Dec 11, 2025 · N521UW · Airbus A321231 · Emergency Exits > AIRCRAFT WAS NOT GROUNDED: DOOR 3L ARMING LEVER COVER NOT SECURED. MAINTENANCE SECURED DOOR 3L ARMING LEVER PER AMM 25-60-00. - [SDR AALA202510103967](https://openairdocs.org/sdr/AALA202510103967.md): Apu · odor · Oct 6, 2025 · N521UW · Airbus A321231 · APU Core Engine > AIRCRAFT WAS GROUNDED: SOF EVENT AFTER TAKEOFF, THEN DISSIPATED MIC 1580902. MAINTENANCE DETERMINED APU WAS SOURCE OF ODOR AND REPLACED APU IAW J/C 26L31049003. - [SDR AALA202507031808](https://openairdocs.org/sdr/AALA202507031808.md): Battery · no test · Jul 2, 2025 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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. - [SDR AALA202507036506](https://openairdocs.org/sdr/AALA202507036506.md): Battery · no test · Jul 2, 2025 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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. - [SDR AALA202507036132](https://openairdocs.org/sdr/AALA202507036132.md): Battery · no test · Jul 2, 2025 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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. - [SDR AALA202507022962](https://openairdocs.org/sdr/AALA202507022962.md): Battery · no test · Jul 2, 2025 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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 (A - [SDR AALA202507023178](https://openairdocs.org/sdr/AALA202507023178.md): Battery · no test · Jul 2, 2025 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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 (A - [SDR AALA202507029906](https://openairdocs.org/sdr/AALA202507029906.md): Battery · no test · Jul 2, 2025 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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 (A - [SDR AALA202507027102](https://openairdocs.org/sdr/AALA202507027102.md): Battery · no test · Jul 2, 2025 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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 (A - [SDR AALA202507020810](https://openairdocs.org/sdr/AALA202507020810.md): Power Supply · no test · Jul 2, 2025 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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 (A - [SDR AALA202507025869](https://openairdocs.org/sdr/AALA202507025869.md): Slide · no test · Jul 2, 2025 · N521UW · Airbus A321231 · Escape Slide > AIRCRAFT 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 (A - [SDR AALA202506239210](https://openairdocs.org/sdr/AALA202506239210.md): Power Supply · no test · Jun 21, 2025 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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. - [SDR AALA202505194314](https://openairdocs.org/sdr/AALA202505194314.md): Lock · sticking · May 16, 2025 · N521UW · Airbus A321231 · Fixed Inner Doors > AIRCRAFT 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. - [SDR AALA202408092506](https://openairdocs.org/sdr/AALA202408092506.md): Control Unit · faulted · Aug 8, 2024 · N521UW · Airbus A321231 · Landing Gear System > AIRCRAFT 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. THE - [SDR AALA202407221587](https://openairdocs.org/sdr/AALA202407221587.md): Hinge Arm · worn · Jul 20, 2024 · N521UW · Airbus A321231 · Vertical Stabilizer > AIRCRAFT 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. - [SDR AALA202407221958](https://openairdocs.org/sdr/AALA202407221958.md): Hinge Arm · worn · Jul 20, 2024 · N521UW · Airbus A321231 · Vertical Stabilizer > AIRCRAFT 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. - [SDR AALA202406206154](https://openairdocs.org/sdr/AALA202406206154.md): Lever · loose · Jun 19, 2024 · N521UW · Airbus A321231 · Emergency Exits > AIRCRAFT WAS NOT GROUNDED: DOOR 3L ARMING LEVER LOOSE. RESECURED L3 ARMING GRIP HANDLE PER AMM 52-22-22. - [SDR AALA202406102490](https://openairdocs.org/sdr/AALA202406102490.md): Wire · damaged · Jun 7, 2024 · N521UW · Airbus A321231 · Light System Wiring > AIRCRAFT 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. - [SDR AALA202406033284](https://openairdocs.org/sdr/AALA202406033284.md): Fitting · lack of lube · May 31, 2024 · N521UW · Airbus A321231 · Emergency Equipment > AIRCRAFT 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. - [SDR AALA2024051609862](https://openairdocs.org/sdr/AALA2024051609862.md): Slide · warning message · May 7, 2024 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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. - [SDR AALA202405139862](https://openairdocs.org/sdr/AALA202405139862.md): Power Supply · faulted · May 7, 2024 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT WAS GROUNDED: EMERGENCY POWER SUPPLY UNIT 10WL FAULT MESSAGE DISPLAYED DURING SYSTEM TEST. (OPEN) - [SDR AALA202405101192](https://openairdocs.org/sdr/AALA202405101192.md): Power Supply · defective · May 7, 2024 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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 AC - [SDR AALA202405101918](https://openairdocs.org/sdr/AALA202405101918.md): Light · defective · May 7, 2024 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT 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 AC - [SDR AALA202404011205](https://openairdocs.org/sdr/AALA202404011205.md): Battery · failed · Mar 30, 2024 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT WAS NOT GROUNDED: CIDS 1 FAILED EMERGENCY POWER SUPPLY UNIT SYSTEM. REPLACED L1 EMERGENCY POWER SUPPLY UNIT BATTERY. - [SDR AALA202403262736](https://openairdocs.org/sdr/AALA202403262736.md): Solenoid · faulted · Mar 24, 2024 · N521UW · Airbus A321231 · Compressor Bleed Valve > AIRCRAFT 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, - [SDR AALA202403269219](https://openairdocs.org/sdr/AALA202403269219.md): Eec · faulted · Mar 24, 2024 · N521UW · Airbus A321231 · Fuel Controlling System > AIRCRAFT 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, - [SDR AALA202208232549](https://openairdocs.org/sdr/AALA202208232549.md): Actuator · none · Jul 27, 2022 · N521UW · Airbus A300* · Rudder Control System > AIRCRAFT 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 - [SDR AALA202208233799](https://openairdocs.org/sdr/AALA202208233799.md): Actuator · none · Jul 27, 2022 · N521UW · Airbus A300* · Rudder Control System > AIRCRAFT 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 ACT - [SDR AALA202208235283](https://openairdocs.org/sdr/AALA202208235283.md): Computer · none · Jul 27, 2022 · N521UW · Airbus A300* · Rudder Control System > AIRCRAFT 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 ACT - [SDR AALA202207292549](https://openairdocs.org/sdr/AALA202207292549.md): None · none · Jul 27, 2022 · N521UW · Airbus A300* · Rudder Control System > AIRCRAFT 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) - [SDR AALA202203187644](https://openairdocs.org/sdr/AALA202203187644.md): Container · inoperative · Mar 16, 2022 · N521UW · Airbus A300* · Passenger Oxygen System > AIRCRAFT 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. - [SDR AALA202202099275](https://openairdocs.org/sdr/AALA202202099275.md): Check Valve · unserviceable · Feb 6, 2022 · N521UW · Airbus A300* · Hydraulic Power System > AIRCRAFT 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 AMM - [SDR AALA202202092812](https://openairdocs.org/sdr/AALA202202092812.md): Pump · overheated · Feb 6, 2022 · N521UW · Airbus A300* · Hydraulic Pump (Electric/Engine), Main > AIRCRAFT 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 AMM - [SDR AALA202202082812](https://openairdocs.org/sdr/AALA202202082812.md): Pump · overheated · Feb 6, 2022 · N521UW · Airbus A300* · Hydraulic Pump (Electric/Engine), Main > AIRCRAFT 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. - [SDR AALA202202072812](https://openairdocs.org/sdr/AALA202202072812.md): None · none · Feb 6, 2022 · N521UW · Airbus A300* · Hydraulic Pump (Electric/Engine), Main > AIRCRAFT 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) - [SDR AALA202112272575](https://openairdocs.org/sdr/AALA202112272575.md): Control Valve · leaking · Dec 24, 2021 · N521UW · Airbus A300* · Landing Gear Brake System > AIRCRAFT 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 SATISFACTO - [SDR AALA202108188236](https://openairdocs.org/sdr/AALA202108188236.md): Battery Pack · discharged · Aug 18, 2021 · N521UW · Airbus A321231 · Emergency Equipment > AIRCRAFT WAS NOT GROUNDED: FORWARD EMERGENCY FLASHLIGHT SEAL BROKEN. REPLACED EMERGENCY FLASHLIGHT BATTERY AND TAMPER SEAL AS REQUIRED. - [SDR AALA202108021327](https://openairdocs.org/sdr/AALA202108021327.md): Diaphragm · missing · Jul 30, 2021 · N521UW · Airbus A321231 · Emergency Equipment > AIRCRAFT 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. - [SDR AALA202105142266](https://openairdocs.org/sdr/AALA202105142266.md): Power Supply · faulted · May 13, 2021 · N521UW · Airbus A321231 · Emergency Lighting > AIRCRAFT IN BASE MAINTENANCE: EMERGENCY POWER SUPPLY UNIT 14WL IN PASSENGER CABIN FAULT. REPLACED POWER SUPPLY PER AMM 33-51-38-400-001-A. - [SDR AALA202105089012](https://openairdocs.org/sdr/AALA202105089012.md): Support Angle · cracked · May 7, 2021 · N521UW · Airbus A321231 · Elevator Structure > AIRCRAFT 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. Next page: https://openairdocs.org/aircraft/N521UW/reports.md?page=2 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql 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 ``` This list as a web page: https://openairdocs.org/aircraft/N521UW/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.