# Service difficulty reports: N540QS A list on [N540QS](https://openairdocs.org/aircraft/N540QS.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR DXTA2026081809299](https://openairdocs.org/sdr/DXTA2026081809299.md): Trim Switch · faulted · Aug 15, 2026 · N540QS · Cessna 680A · Elevator Tab Control System > ON DEPARTURE THROUGH 500 FT THERE WAS NO RESPONSE FROM THE PITCH TRIM. THE NOSE CONTINUED TO PITCH UP AND WE ACTIVATED THE SECONDARY TRIM SYSTEM. AT THAT TIME BOTH SYSTEMS FAILED & THE CAS MESSAGE FOR EACH SYSTEM FAILURE ILLUMINATED. DISENGAGED THE THROTTLES - [SDR DXTA2026060508322](https://openairdocs.org/sdr/DXTA2026060508322.md): Motor · faulted · Jun 2, 2026 · N540QS · Cessna 680A · Empennage Structure > WHEN CLIMBING, WITH THE AUTOPILOT ENGAGED, BETWEEN FL210 AND FL220, THE AMBER STAB TRIM MONITOR MESSAGE POSTED. WE RAN THE QRH AND MANUALLY USED THE PRIMARY STAB TRIM FOR AIRSPEED CHANGES. FODM WAS CONTACTED AND A DIVERSION WAS INITIATED. CORRECTIVE ACTION: - [SDR DXTA2025030302522](https://openairdocs.org/sdr/DXTA2025030302522.md): Actuator · defective · Feb 26, 2025 · N540QS · Cessna 680A · Landing Gear Actuator > GEAR DISAGREE N AMBER CAS: ENROUTE FL410 LOUD BANG FOLLOWED BY GEAR DISAGREE N AND SHADED NOSEGEAR. FELT NOSEGEAR WAS PARTIALLY DOWN. AT 180KIAS AT APPROX FL300 FELT ANOTHER JOLT AND ALL INDICATIONS WERE THE NOSEGEAR RETURNED TO THE UP POSITION. RECEIVED 3 GRE - [SDR DXTA2024051311735](https://openairdocs.org/sdr/DXTA2024051311735.md): Wire Harness · damaged · May 10, 2024 · N540QS · Cessna 680A · Door System Wiring > CABIN DOOR CAS MESSAGE WHEN DOOR IS CLOSED BUT WONT LATCH ALL THE WAY. AIRCRAFT WAS TROUBLESHOT DOWN TO A POTENTIAL BAD SOLENOID. REMOVED AND. REPLACED CABIN DOOR.LOCK SOLENOID PER MM 52-70-15. OPS CHECKS FAILED. CONTINUED TROUBLESHOOTING BY RINGING OUT - [SDR DXTA2024050911716](https://openairdocs.org/sdr/DXTA2024050911716.md): Spacer · out of position · May 8, 2024 · N540QS · Cessna 680A · Passenger/Crew Doors > MAIN CABIN DOOR IS NOT CLOSING. WE NOTICED THE EXTERNAL HANDLE IS NOT CLOSING FLUSH WITH THE DOOR. BEGAN TROUBLESHOOTING. CONNECTED POWER CART AND PERFORMED OPS CHECK OF MAIN ENTRANCE DOOR MULTIPLE TIMES WITH NO DEFECTS NOTED. OPENED DOOR AND PERFORMED A VISU - [SDR DXTA2024042211577](https://openairdocs.org/sdr/DXTA2024042211577.md): Mirror · dirty · Apr 22, 2024 · N540QS · Cessna 680A · Emergency Equipment > ON CLOSURE OF MAIN CABIN DOOR & VISUALLY INSPECTING THE LOCKING PINS, ONLY TWO OF SIX HASH MARKS WERE ABLE TO BE SEEN. ALSO HAD TO MANUALLY RESET THE CABIN LIFT PER QRH WHILE LOOKING AT THE DOOR. ALL SIX WERE DIRTY INHIBITING THE LOCKING INDICATOR FROM BEING - [SDR DXTA2024022610991](https://openairdocs.org/sdr/DXTA2024022610991.md): Light · none · Feb 23, 2024 · N540QS · Cessna 680A · Emergency Lighting > EMERGENCY LIGHTS INOPERATIVE. PERFORMED OPERATIONAL CHECK OF THE EMERGENCY EXIT LIGHTS BOTH INTERIOR AND EXTERIOR. OPERATIONAL CHECK GOOD. NO FURTHER DEFECTS FURTHER DEFECTS NOTED AT THIS TIME. WORK PERFORMED IN REFERENCE TO CE-680A AMM 33-50-00 - [SDR EBVR450D110723001](https://openairdocs.org/sdr/EBVR450D110723001.md): Tail Cone · corroded · Nov 7, 2023 · N540QS · Cessna 680A · Aerodynamic Fairings > CORROSION FOUND ON R/H TAIL STINGER, STARTED REMOVING CORROSION FROM THE TAILCONE STINGER RH FWD SKIN AND NOTED SEVERE LEVEL 2 CORROSION THAT EXTENDS THROUGH THE ENTIRE THICKNESS OF THE SKIN. REMOVED AND REPLACED L/H AND R/H STRINGERS IN THE TAILCONE STINGER, - [SDR DXTA2023080792470](https://openairdocs.org/sdr/DXTA2023080792470.md): Unknown · unknown · Aug 7, 2023 · N540QS · Cessna 680A · Landing Gear Brake System > WHEN APPLYING MODERATE TO HEAVY BRAKING ON LANDING, BRAKES ARE VERY LOUD AND SHUTTER, SHAKING THE WHILE PLANE. WHEN DOING RADIUS TURNS IN THE WET, THE BRAKES ARE VERY LOUD AND SHUTTER. UNDER LIGHT BRAKING LIKE WHEN COMING TO A COMPLETE STOP, THE BRAKES MAKE A - [SDR DXTA2022060362170](https://openairdocs.org/sdr/DXTA2022060362170.md): Connector · broken · Jun 3, 2022 · N540QS · Cessna 680A · Emergency Lighting > FLOOR EMERG EXIT LIGHT: AISLE PATH LIGHT IN LAV IS INOP. LIGHT DOES NOT WORK WITH EMER LIGHT SWITCH ON OR WITH AIRCRAFT BATTERIES ON.//CORRECTIVE ACTION// TS TO A BAD DIODE AND BROKEN WIRE AT AISLE PATH LIGHT CONNECTION IN THE LAV PF2010. REPLACED DIODE AND R - [SDR DXTA2022051661830](https://openairdocs.org/sdr/DXTA2022051661830.md): Windshield · broken · May 15, 2022 · N540QS · Cessna 680A · Flight Compartment Windows > CAPTAIN COCKPIT WINDOW: AT 11000 FEET HEARD LOUD CRACK FROM LEFT SIDE COCKPIT WINDOW AND NOTICED HUGE CIRCULAR CRACK. VMC CONDITIONS. NO QRH PROCEDURE. // SIGNOFF// REMOVED DAMAGED PILOT SIDE WINDOW (PN:9914809-1)(SN:16621H1658) AND INSTALLED NEW CONDITION SID - [SDR DXTA2021111752030](https://openairdocs.org/sdr/DXTA2021111752030.md): None · none · Nov 16, 2021 · N540QS · Cessna 680A · Landing Gear Retraction/Extension System > SEVERE TURBULENCE: SEVERE TURBULENCE ENCOUNTERED THREE SEPERATE TIMES. MOMENTARY LOSS OF ALTITUDE AND AIRSPEED CONTROL WHICH RESULTED IN AN OVERSPEED CONDITION. NOTE: DURING EACH EVEN, THE GEAR WENT INTO TRANSIT MODE AND THE GEAR OVERSPEED WARNING CAME ON. - [SDR DXTA2021081046700](https://openairdocs.org/sdr/DXTA2021081046700.md): Nut · loose · Aug 9, 2021 · N540QS · Cessna 680A · Door System Wiring > MAIN DOOR HANDLE: THE RED BUTTON ON THE MAIN CABIN DOOR HANDLE HAS POPPED OUT AND IS LOOSE. // SIGN OFF // REMOVED MCD STEP A5SY AND GAINED ACCESS TO BACK SIDE OF OF RED BUTTON SWITCH. RESECURED LAMNUT AS EQUIRED.REINSTALLED STEP ASSY. STEP UGHTS OPS CHECK GO - [SDR 2021F00076](https://openairdocs.org/sdr/2021F00076.md): Frame · cracked · Apr 16, 2021 · N540QS · Cessna 680A · Fuselage Main, Frame > NLG WHEEL WELL WEB AND UPPER MID FRAME CRACKED. REPAIR SR-680A-ATA53-25890 DATED: 6/1/2020, CRACK DAMAGE, NOSE LANDING GEAR WHEEL WELL (NWW), FRAME WEB, AND DOUBLERS FS 75. WITH FAA FORM 8100-9 DATED: 6/1/2020. - [SDR DXTA2021031939670](https://openairdocs.org/sdr/DXTA2021031939670.md): Battery · defective · Mar 18, 2021 · N540QS · Cessna 680A · Emergency Lighting > MAIN EXIT SIGN/LIGHT: MAIN EXIT SIGNS LOWER LEFT AND RIGHT AND SEAT 10 EMER LIGHTS INOP ON PREFLIGHT CHECK.///SIGN-OFF///FOUND #1 BATTERY EMERGENCY BATTERY DEAD, REMOVED #1 EMER BATTERY PACK REF. CE680A M/M. 33-50-06 P/N OFF CBS28-1 S/N OFF 007139 - [SDR DXTA030120213882](https://openairdocs.org/sdr/DXTA030120213882.md): Battery Pack · defective · Mar 1, 2021 · N540QS · Cessna 680A · Emergency Lighting > EMERG EXIT SIGN/LIGHT: EXIT SIGN ON LEFT AFT DIVIDER DOES NOT ILLUMINATE DURING EMERGENCY LIGHT TEST. WHEN AIRCRAFT IS POWERED LIGHT ILLUMINATES. EMERGENCY EXIT SYSTEM T/S IAW CE-680A WDM 33-50-01 REMOVED FAILED $4 EMERGENCY BATTERY POWER SUPPLY P/N CB528-1 - [SDR DXTA2021012704648](https://openairdocs.org/sdr/DXTA2021012704648.md): Battery Pack · discharged · Jan 27, 2021 · N540QS · Cessna 680A · Emergency Lighting > EMERGENCY BATTERIES ARE COMPLETELY DEAD. SWITCH WAS IN OFF POSITION WHEN WE ARRIVED. POWERED UP A/C AND LET EMER BATTERIES CHARGE FOR SEVERAL HOURS. PERFORMED EMERGENCY LIGHTING OPERATIONAL CHECK, PER CE-680A AMM REF 33-50-00-5. OPERATIONAL CHECK GOOD. CA - [SDR DXTA2019031302159](https://openairdocs.org/sdr/DXTA2019031302159.md): Not Reported · malfunctioned · Mar 21, 2019 · N540QS · Cessna 680A · Landing Gear Retraction/Extension System > RIGHT MLG LANDING GEAR RETRACTION DID NOT RETRACT - RIGHT MAIN LANDING GEAR WOULD NOT RETRACT AS INDICATED BY BOX WITH CROSS HATCH. PERFORMED QRC AND RETURNED TO AIRPORT. - [SDR DXTA2019032102188](https://openairdocs.org/sdr/DXTA2019032102188.md): Uplock Switch · inoperative · Mar 20, 2019 · N540QS · Cessna 680A · Landing Gear Position and Warning > RIGHT MLG LANDING GEAR RETRACTION DID NOT RETRACT - RIGHT MAIN LANDING GESR WOULD NOT RETRACT AS INDICATED BY BOX WITH CROSS HATCH. PERFORMED QRC AND RETURNED TO AIRPORT. REMOVED & REPLACED RIGHT MLG UPLOCK SWITCH - OPS CHK GOOD. ## 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 = 'N540QS' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N540QS/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.