# Service difficulty reports: N504QS A list on [N504QS](https://openairdocs.org/aircraft/N504QS.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR DXTA2026092509841](https://openairdocs.org/sdr/DXTA2026092509841.md): Light · inoperative · Sep 21, 2026 · N504QS · Cessna 680A · Emergency Lighting > EMERGENCY LIGHT TOE KICK SEAT 3 INOPERATIVE. REPLACED LIGHT BAR. OPS CHKD GOOD. IAW AMM 25-20-22-10. - [SDR DXTA2026090809597](https://openairdocs.org/sdr/DXTA2026090809597.md): Elec Connector · misinstalled · Sep 7, 2026 · N504QS · Cessna 680A · Light System Wiring > DURING PREFLIGHT, THE VERTICAL "EXIT" SIGN ON THE FRONT OF THE LAV DID NOT COME ON WITH THE EMER LIGHT SWITCH IN ANY POSITION. IT DID FINALLY COME WITH THE INTERIOR POWER SWITCH, AND OFF WITH SAME. ALL OTHER EMERY LIGHTS SEEM TO FUNCTION PROPERLY. DISCREPANCY - [SDR JGVR20251113001](https://openairdocs.org/sdr/JGVR20251113001.md): Tunnel Wall · corroded · Nov 13, 2025 · N504QS · Cessna 680A · Fuselage Main, Structure > BLENDED CORRODED AREAS OF THE NOSE LANDING GEAR TUNNEL, PERFORMED NDT, AND REPORTED FOR REPAIR DISPOSITION. FABRICATED AND INSTALLED REPAIR DOUBLERS AS REQUIRED TO ENGINEERING ORDER. - [SDR DXTA2025061703913](https://openairdocs.org/sdr/DXTA2025061703913.md): Handle · binding · Jun 15, 2025 · N504QS · Cessna 680A · Passenger/Crew Doors > THE MCD HANDLE IS HARD TO OPERATE REQUIRING EXCESSIVE UPWARD FORCE ON THE HANDLE TO GET IT TO RELEASE. THE LATCH MAKES A POPPING SOUND AS THOUGH THE LOCKS ARE UNDER PRESSURE. WITH THE DOOR HANDLE IN THE UP POSITION YOU HAVE TO PUSH THE DOOR TO GET IT TO FREE F - [SDR DXTA2025043003248](https://openairdocs.org/sdr/DXTA2025043003248.md): Pdu · faulted · Apr 27, 2025 · N504QS · Cessna 680A · Trailing Edge Flap Control System > FLAPS FAIL AMBER CAS: FLAPS FAIL SELECTING FLAPS 2. RAN CHECKLIST AND FAILED AGAIN AFTER USING FLAP RESET. CORRECTIVE ACTION: PERFORMED FLAP SYSTEM TROUBLESHOOTING, FOUND BITE 2 FAULT CODE ON FLAP CONTROLLER. DETERMINED THAT FLAP PDU REQUIRES REPLACEMENT. ALL - [SDR DXTA2025040402941](https://openairdocs.org/sdr/DXTA2025040402941.md): Controller · faulted · Apr 4, 2025 · N504QS · Cessna 680A · Trailing Edge Flap Control System > FLAPS FAIL AMBER CAS: AFTER TAKEOFF, FLAPS WERE SELECTED UP AT FRA (FROM FLAPS 1). FLAPS FAIL CAS POSTED AND WE FOLLOWED THE FLAP FAIL APPROACH/LANDING QRC. FLAPS DID NOT RETRACT. WE RETURNED TO THE DEPARTURE AIRPORT AND LANDED WITH FLAPS 1. CORRECTIVE ACTION: - [SDR DXTA2025031002578](https://openairdocs.org/sdr/DXTA2025031002578.md): Probe · defective · Mar 4, 2025 · N504QS · Cessna 680A · Aircraft Fuel Distribution System > FUEL IMBALANCE AMBER CAS: IN CRUISE AT FL 400 LEFT TANK WAS 440 LBS LOWER THAN RIGHT. FUEL FLOWS WERE SAME. CROSSFED RIGHT TO LEFT TO BALANCE TANK. TOOK CROSSFEED OFF AND THEN FUEL WAS ONLY. IRNING OUT OF RIGHT TANK. IT GOT TO 300 INBALANCE AND I CROSSFED AGA - [SDR DXTA2025012702103](https://openairdocs.org/sdr/DXTA2025012702103.md): Seal · dirty · Jan 25, 2025 · N504QS · Cessna 680A · Passenger/Crew Doors > MAIN DOOR: MAIN CABIN DOOR WILL NOT FREEFALL AUTOMATICALLY WHEN TRYING TO OPEN FROM BOTH THE INSIDE AND OUTSIDE. WE HAD TO PULL IT AWAY FROM THE FRAME TO GET IT TO COME DOWN. WHEN TRYING TO OPEN FROM THE INSIDE, YOU HAVE TO PUSH ON THE STAIRS PRETTY HARD TO GE - [SDR DXTA2024013010755](https://openairdocs.org/sdr/DXTA2024013010755.md): Uplock Switch · out of adjust · Jan 30, 2024 · N504QS · Cessna 680A · Landing Gear Position and Warning > RIGHT MAIN GEAR DISAGREE ILLUMINATED DURING LANDING GEAR RETRACTION. DOWNLOADED ARIES TO TEXTRON FOR INTERROGATION OF CMC CHECKED LIVE VIEW FOR ANY WOW SWITCH ISSUES, NO ISSUES PRESENT. FOUND EMERGENCY GEAR EXTENSION BLOWDOWN BOTTLE IN DISCHARGE POSITION AND C - [SDR DXTA2023110699740](https://openairdocs.org/sdr/DXTA2023110699740.md): Unknown · unknown · Nov 4, 2023 · N504QS · Cessna 680A · Emergency Lighting > EMERGENCY LIGHTING: ALL INTERIOR AND EXTERIOR EMERGENCY LIGHTS ARE INOP WITH THE EMER LIGHT SWITCH IN ON. USED APU AND ALLOWED THE EMERGENCY LIGHT BATTERIES TO CHARGE FOR 60 MINUTES. PERFORMED DISCHARGE OF THE EMERGENCY LIGHT POWER SUPPLY BATTERY PACKS. MONIT - [SDR DXTA2023103099010](https://openairdocs.org/sdr/DXTA2023103099010.md): Unknown · unknown · Oct 27, 2023 · N504QS · Cessna 680A · Emergency Lighting > COLD DARK AIRPLANE. PERFORM THE EMER LIGHT TEST AND WHEN SWITCH IS MOVED TO ON ALL EMER LIGHTS IN CANIN WORK EXCEPT FOR LOWER EXIT LIGHTS AT THE MAIN CABIN DOOR. WHEN SWITCH IS MOVED TO ARM, ALL EMER LIGHTS GO OUT. AFTER CHARGING THE PACKS OFF THE APU FOR TWEN - [SDR DXTA2023100497240](https://openairdocs.org/sdr/DXTA2023100497240.md): Unknown · unknown · Oct 3, 2023 · N504QS · Cessna 680A · Emergency Lighting > CABIN EMERG LIGHT: SEAT 10 EMERGENCY FLOOR LIGHTING INOP. PERFOMED OPERATIONAL CHECK OF THE EMERGANCY LIGHTING BATTERIES, AND DURING THE TEST IT WAS NOTED THAT THE #10 SEAT FLOOR LIGHT DID ILLUMINATE AND STAYED LIT FOR THE DURATION OF THE OPERATIONAL CHECK. N - [SDR DXTA2023071490890](https://openairdocs.org/sdr/DXTA2023071490890.md): Light · defective · Jul 14, 2023 · N504QS · Cessna 680A · Emergency Lighting > EMERGENCY EXIT LIGHTING UNDER SEAT 10 WILL NOT ILLUMINATE WITH EMERGENCY LIGHT SWITCH TO ARM. WILL ILLUMINATE AT TIMES WITH PAX SAFETY SWITCH ON ON SHIPS POWER. REMOVED LED FLOOD LIGHT UNDER #10 SEAT DUE TO INTERMITTENT OPERATION AND REPLACED WITH NEW PART O - [SDR DXTA2021121353360](https://openairdocs.org/sdr/DXTA2021121353360.md): Proximity Switch · defective · Dec 11, 2021 · N504QS · Cessna 680A · Passenger/Crew Doors > MAIN DOOR: AFTER STARTING THE FIRST ENGINE WITH THE MAIN CABIN DOOR CLOSED, THE CABIN DOOR OPEN CAS MESSAGE WOULD CYCLE ON AND OFF REPEATEDLY AND WE COULD HEAR THE DOOR SOLENOID CYCLING. AFTER ENGINE SHUTDOWN AND THE APU STILL RUNNING, THE CAS MESSAGE CONTINUE - [SDR DXTA2021120853160](https://openairdocs.org/sdr/DXTA2021120853160.md): Monitor · defective · Dec 7, 2021 · N504QS · Cessna 680A · Passenger/Crew Doors > MAIN DOOR: CABIN DOOR OPEN CAS MESSAGE WITH DOOR SOLENOID CYCLING REPEATEDLY WITH DOOR CLOSED. // SIGNOFF // POWERED UP AIRCRAFT AND OPERATED 'THE DOOR SEVERAL TIMES WITH NO DEFECTS NOTED, CHECKED FAULT HLSTORY WITH NO RELATED MESSAGES, REMOVED STEPS AND ACCE - [SDR DXTA2021110851520](https://openairdocs.org/sdr/DXTA2021110851520.md): Radome · none · Nov 7, 2021 · N504QS · Cessna 680A · Aerodynamic Fairings > RADOME: ON TAKEOFF WE STRUCK A LARGE BIRD. SIGNIFICANT DAMAGE IS LOCATED ON THE RADOME. PART OF THE BIRDS REMAINS ARE LODGED IN THE RADOME. THE GLIDESLOPE WAS INOPERATIVE ON OUR VISUAL APPROACH. TOWER WAS UNAWARE OF ANY GLIDESLOPE OUTAGE. BIRD SPLATTER IS ALSO - [SDR 2021F00203](https://openairdocs.org/sdr/2021F00203.md): Skin · damaged · Oct 14, 2021 · N504QS · Cessna 680A · Aerodynamic Fairings > TAIL CONE SKIN (LEFT SIDE) DAMAGE. ACCOMPLISHED ENGINEERING DQ31887M1 DATED OCTOBER 13TH, 2021, 680A-0041 (N504QS) TAILCONE SKIN (LEFT SIDE) DAMAGE (FASTENER REMOVAL NICKED SKIN) - [SDR DXTA022520213861](https://openairdocs.org/sdr/DXTA022520213861.md): Connector · unsecure · Feb 24, 2021 · N504QS · Cessna 680A · Fire Protection System Wiring > FIRE DETECT FAIL L AMBER CAS: FIRE DETECT FAIL AMBER CAS ILLUMINATED FOR ABOUT 10 SECONDS UPON DESCENT INTO COLUMBUS.// SIGN OFF // UPON INITIAL INSPECTION OF LH ENGINE FIRE LOOP CANNON PLUG TO NOT BE FULLY TIGHTENED DOWN. SUSPECT THE LOOSE CANNON PLUG COUPLED - [SDR DXTA022320213849](https://openairdocs.org/sdr/DXTA022320213849.md): Landing Gear · malfunctioned · Feb 21, 2021 · N504QS · Cessna 680A · Landing Gear Position and Warning > GEAR DISAGREE R AMBER CAS: AIRCRAFT SAT IN SUB-FREEZING WEATHER ALL NIGHT PRIOR TO OUR DEPARTURE. AMBER GEAR DISAGREE RIGHT CAS ILLUMINATED UPON GEAR RETRACTION AFTER TAKEOFF. OBSERVED GRAY" X "OVER R [T2PL6D0082YZP] // SIGN OFF // PERFORMED THE ARES DOWNLOA - [SDR DXTA022220213849](https://openairdocs.org/sdr/DXTA022220213849.md): Warning Message · illuminated · Feb 21, 2021 · N504QS · Cessna 680A · Landing Gear Position and Warning > GEAR DISAGREE R AMBER CAS: AIRCRAFT SAT IN SUB-FREEZING WEATHER ALL NIGHT PRIOR TO OUR DEPARTURE. AMBER GEAR DISAGREE RIGHT CAS ILLUMINATED UPON GEAR RETRACTION AFTER TAKEOFF. OBSERVED GRAY" X "OVER R [T2PL6D0082YZP]. - [SDR 2020F00351](https://openairdocs.org/sdr/2020F00351.md): Doubler · cracked · Jul 29, 2020 · N504QS · Cessna 680A · Fuselage Main, Structure > CRACK DAMAGE, NOSE LANDING GEAR WHEEL WELL (NWW), FRAME, WEB, AND DOUBLERS, FS 75. ACCOMPLISHED TEXTRON AVIATION FIELD REPAIR SR-680A-ATA53-25890 REV- DATED JUNE 1, 2020 AND 8100-9 DATED 6/1/2020; STANDARD REPAIR - CRACK DAMAGE, NOSE LANDING GEAR WHEEL WELL (N - [SDR 2020F00129](https://openairdocs.org/sdr/2020F00129.md): Drag Angle · corroded · Dec 13, 2019 · N504QS · Cessna 680A · Fuselage Miscellaneous Structure > REPAIR TO LEFT FUSELAGE OVER-WING DRAG ANGLE CORROSION. TEXTRON AVIATION ENGINEERING REPAIR MEMO DQ24107M1 DATED DEC. 11, 2019. - [SDR DXTA2018080821212](https://openairdocs.org/sdr/DXTA2018080821212.md): Pushrod · not reported · Jul 20, 2018 · N504QS · Cessna 680SOV · Elevator Control System > AT 11000 FEET, AIRCRAFT ACCELERATING THROUGH 270 KNOTS, AIRCRAFT STARTED VIBRATING. AT 300 KNOTS YOKE STARTED BOUNCING FORWARD AND AFT 3-6 INCHES. NOTICED WINGS VIBRATING AT A HIGH FREQUENCY AS WELL. SLOWED AIRCRAFT DOWN TO 200 KNOTS AND VIBRATION WAS ONLY SL - [SDR DXTA201710300001](https://openairdocs.org/sdr/DXTA201710300001.md): Duct · damaged · Oct 28, 2017 · N504QS · Cessna 680CE · Air Conditioning System > IN FLIGHT COULD NOT CONTROL TEMPERATURES, GOT HOT, THEN A BURNING ODOR, ON TOUCH DOWN THE ACM TEMP EICAS MESSAGE WAS DISPLAYED. FOUND APU RESTRICTOR DAMAGED. REPLACED DUCT, COUPLINGS AND O-RINGS. ## 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 = 'N504QS' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N504QS/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.