# Service difficulty reports: N421DX A list on [N421DX](https://openairdocs.org/aircraft/N421DX.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR DALA2025120808958](https://openairdocs.org/sdr/DALA2025120808958.md): Light · inoperative · Dec 5, 2025 · N421DX · Airbus A330941 · Emergency Lighting > SEAT 33B EMERGENCY EXIT LIGHT INOP. REPAIRED WIRING PER AMM 33-52. OK FOR SERVICE. (7978895) - [SDR DALA2025111308340](https://openairdocs.org/sdr/DALA2025111308340.md): Skin · damaged · Nov 1, 2025 · N421DX · Airbus A330941 · Fuselage Main, Plate/Skin > FWD CARGO DOOR, FWD SURROUNDING SKIN DAMAGED, GOUGED FOA FR20A / STGR 40 AND -41RH. REPAIRED IAW SRM 53-21-11-283-017. (7922745) - [SDR DALA2025100607254](https://openairdocs.org/sdr/DALA2025100607254.md): Light · inoperative · Oct 4, 2025 · N421DX · Airbus A330941 · Emergency Lighting > SEAT 30B EMER LIGHT INOP. REPLACED LIGHT ASSY PER A330 AMM 33-51. OK FOR SERVICE. (7007134) - [SDR DALA2025063004830](https://openairdocs.org/sdr/DALA2025063004830.md): Bottle · leaking · Jun 27, 2025 · N421DX · Airbus A330941 · Passenger/Crew Doors > SHIP 3421 3L DOOR ASSIST LOW. CORRECTIVE ACTION: REPAIRED AND SERVICED DOOR BOTTLE PER A330 AMM 52-15. OK FOR SERVICE. (6986618) - [SDR DALA2025052103904](https://openairdocs.org/sdr/DALA2025052103904.md): Bottle · low pressure · May 21, 2025 · N421DX · Airbus A330941 · Passenger/Crew Doors > SHIP 3421 3L EMERGENCY DOOR CYLINDER IN YELLOW BAND PRESSURE. CORRECTIVE ACTION: SERVICED 3L DOOR EMERGENCY ACTUATOR PER A330 AMM 52-15. (7027334) - [SDR DALA2025042803278](https://openairdocs.org/sdr/DALA2025042803278.md): Wire · damaged · Apr 27, 2025 · N421DX · Airbus A330941 · Light System Wiring > SHIP 3421 MULTIPLE EMERGENCY LIGHTS INOP BETWEEN DOORS 3L AND 4L. CORRECTIVE ACTION: RE-PINNED WIRE REF A330 AMM 33-51. REMOVED AND REPLACED EPSU REF A330 AMM 33-51. OPS GOOD. (7562312) - [SDR DALA2025042303174](https://openairdocs.org/sdr/DALA2025042303174.md): Bottle · low pressure · Apr 21, 2025 · N421DX · Airbus A330941 · Passenger/Crew Doors > SHIP 3421 DOOR ASSIST 3L LOW. CORRECTIVE ACTION: SERVICED 3L DOOR ASSIST PRESSURE PER A330-900 AMM 52-15. OK FOR SERVICE. (6984586) - [SDR DALA2025040702672](https://openairdocs.org/sdr/DALA2025040702672.md): Bottle · low pressure · Apr 4, 2025 · N421DX · Airbus A330941 · Passenger/Crew Doors > SHIP 3421 3L DOOR/SLIDE CAUTION. CORRECTIVE ACTION: SERVICED DOOR ASSIST BOTTLE PER A330 AMM 52-15. OK FOR SERVICE. (7177495) - [SDR DALA2025020700972](https://openairdocs.org/sdr/DALA2025020700972.md): Light · inoperative · Feb 7, 2025 · N421DX · Airbus A330941 · Emergency Lighting > SHIP 3421 FPEEPMS EDGE-MOUNTED LIGHT (WHITE) AT SEAT 33B INOP. CORRECTIVE ACTION: R/R LIGHT ASSY PER A330 AMM 33-51-12. OK FOR SERVICE. (6423033) - [SDR DALA2025012200520](https://openairdocs.org/sdr/DALA2025012200520.md): Bottle · low pressure · Jan 21, 2025 · N421DX · Airbus A330941 · Passenger/Crew Doors > SHIP 3421 3L CHECK DOOR PRESSURE ON FAP. CORRECTIVE ACTION: SERVICED DOOR BOTTLE PER A330 AMM 52-15. OK FOR SERVICE. (6821440) - [SDR DALA2025011000224](https://openairdocs.org/sdr/DALA2025011000224.md): Roller · excess play · Jan 9, 2025 · N421DX · Airbus A330941 · Trailing Edge Flaps > SHIP 3421 R/H WING, O/B FLAP UPLOCK ROLLER HAS PLAY. CORRECTIVE ACTION: REPLACED ROLLER ASSYS PER A330 AMM 27-54-73. (0753315) - [SDR DALA2025011000223](https://openairdocs.org/sdr/DALA2025011000223.md): Roller · excess play · Jan 9, 2025 · N421DX · Airbus A330941 · Trailing Edge Flaps > SHIP 3421 L/H WING, O/B FLAP UPLOCK ROLLER HAS PLAY. CORRECTIVE ACTION: REPLACED ROLLER ASSYS PER A330 AMM 27-54-73. (0753314) - [SDR DALA2025010800171](https://openairdocs.org/sdr/DALA2025010800171.md): Skin · gouged · Jan 8, 2025 · N421DX · Airbus A330941 · Fuselage Main, Plate/Skin > SHIP 3421 FUSELAGE SKIN HAS A GOUGE ABOVE THE BULK CARGO DOOR APPROX MIDDLE OF THE DOOR OPENING. CORRECTIVE ACTION: REPAIRED PER A330 SRM NEO 53-41-11. (0750389) - [SDR DALA2025010800172](https://openairdocs.org/sdr/DALA2025010800172.md): Skin · gouged · Jan 7, 2025 · N421DX · Airbus A330941 · Cargo/Baggage Doors > SHIP 3421 BULK CARGO DOOR - SKIN JUST BELOW EXTERIOR HANDLE IS GOUGED. CORRECTIVE ACTION: REPAIRED PER A330 SRM 52-33-00. (0749352) - [SDR DALA2024113011291](https://openairdocs.org/sdr/DALA2024113011291.md): Panel · loose · Nov 27, 2024 · N421DX · Airbus A330941 · Passenger Oxygen System > SHIP 3421 OXYGEN PANEL LOOSE / LOCATIONS:202. CORRECTIVE ACTION: RE-PACKED MASKS PER A330 AMM 35-21. OPS CHECK GOOD. (0681883) - [SDR DALA2024112611234](https://openairdocs.org/sdr/DALA2024112611234.md): Doubler · mechanic error · Nov 26, 2024 · N421DX · Airbus A330941 · Fuselage Main, Plate/Skin > SHIP 3421 DURING VIASAT INSTALLATION. MISDRILLED TO DOUBLER #1 BETWEEN FR60 AND FR61 AND S-2L AND S-1L. CORRECTIVE ACTION: REPAIRED PER ERA 622492-14 REV ORIGINAL. (0678621) - [SDR DALA2024081608201](https://openairdocs.org/sdr/DALA2024081608201.md): Lamp · inoperative · Aug 16, 2024 · N421DX · Airbus A330941 · Emergency Lighting > SHIP 3421 SEAT 50HJ EEPL LIGHT INOP. CORRECTIVE ACTION: REPLACED LAMP ASSEMBLY AND REPAIRED WIRE PER A330 AMM 33-52. (6163222) - [SDR DALA2024080807902](https://openairdocs.org/sdr/DALA2024080807902.md): Actuator · low pressure · Aug 7, 2024 · N421DX · Airbus A330941 · Passenger/Crew Doors > SHIP 3421 L3 DOOR ACTUATOR EMERGENCY RESERVOIR PRESSURE IN AMBER. CORRECTIVE ACTION: SERVICED DOOR ASSIST BOTTLE PER A330 AMM 52-10. OK FOR SERVICE. (6195990) - [SDR DALA2024072907545](https://openairdocs.org/sdr/DALA2024072907545.md): Bottle · low pressure · Jul 29, 2024 · N421DX · Airbus A330941 · Emergency Equipment > SHIP 3421 3L DOOR ASSIST LOW. CORRECTIVE ACTION: SERVICED DOOR ASSIST BOTTLE PER A330 AMM 52-15. OK FOR SERVICE. (6195935) - [SDR DALA2024071507144](https://openairdocs.org/sdr/DALA2024071507144.md): Pin · lack of lube · Jul 14, 2024 · N421DX · Airbus A330941 · Passenger/Crew Doors > SHIP 3421 ONE LEFT DOOR PIN DIFFICULT TO INSERT. CORRECTIVE ACTION: CLEANED AND LUBED PIN PER A330 AMM 52-12. OPS GOOD. (6170157) - [SDR DALA2024022602649](https://openairdocs.org/sdr/DALA2024022602649.md): Bottle · low pressure · Feb 25, 2024 · N421DX · Airbus A330941 · Emergency Equipment > SHIP 3421 DOOR 03L DOOR LOW PRESSURE ON CDIS. CORRECTIVE ACTION: CHARGED DOOR 3L DOOR ASSIST BOTTLE PER A330 AMM 52-10. (5280809) - [SDR DALA2023111409379](https://openairdocs.org/sdr/DALA2023111409379.md): Unknown · unknown · Nov 12, 2023 · N421DX · Airbus A330941 · Passenger/Crew Doors > SHIP 3421 3421 3R DOOR PIN AND RING SEPARATED FROM RED FLAG AND FELL INSIDE THE DOOR. CORRECTIVE ACTION: FOUND 3R DOOR SAFETY PIN IN DOOR INSIDE, AND REINSTALLED SAFETY PIN & RED FLAG, THEN CHKD OK. (4317853) - [SDR DALA2023070205288](https://openairdocs.org/sdr/DALA2023070205288.md): Unknown · unknown · Jun 28, 2023 · N421DX · Airbus A330941 · Emergency Lighting > AIRCRAFT 3421, EMERGENCY EXIT LIGHT LENS AT DOOR 2L MISSING. CORRECTIVE ACTION: REPLACED EMERGENCY EXIT LIGHT LENS. OK FOR SVC. (LP 4881720) ## 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 = 'N421DX' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N421DX/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.