# Service difficulty reports: N520QS A list on [N520QS](https://openairdocs.org/aircraft/N520QS.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR DXTA2026040707541](https://openairdocs.org/sdr/DXTA2026040707541.md): Pressure Switch · defective · Apr 4, 2026 · N520QS · Cessna 680A · Aircraft Fuel Distribution System > ON CLIMB OUT FROM KCLT I WENT TO CROSS FEED FROM THE LEFT TANK. A FEW SECONDS LATER WE RECEIVED THIS CAS MESSAGE. RAN QRH. MESSAGE CLEARED. TRIED AGAIN ONCE WE REACHED CRUISE. SAME RESULT. CORRECTIVE ACTION: REPLACED PRESSURE SWITCH. OPS CHECK GOOD. IAW CE680A - [SDR DXTA2026010206379](https://openairdocs.org/sdr/DXTA2026010206379.md): Battery · tripped · Dec 30, 2025 · N520QS · Cessna 680A · Emergency Lighting > WITH BOTH BATTERIES DISCONNECTED, EMERGENCY LIGHTS IN OFF POSITION AND AFTER PRESSING 5G SWITCH, MAIN CABIN DOOR EXIT LIGHT, SEAT #3 EMERGENCY LIGHT, AND BOTH WING INSPECTION LIGHTS REMAIN ON RESET TRIPPED #2 EMERGENCY LIGHT BATTERY PACK INERTIA SWITCH. PERFOR - [SDR DXTA2025010801865](https://openairdocs.org/sdr/DXTA2025010801865.md): Battery · defective · Jan 6, 2025 · N520QS · Cessna 680A · Emergency Lighting > WITH POWER OFF AND EMERGENCY LIGHTS TURNED TO ARM POSITION NO LIGHTS ILLUMINATE INSIDE OR OUTSIDE PLANE. DID THE 2 30 MINUTE CHARGES AND STILL NOT WORKING. CORRECTIVE ACTION: REPLACED BATTERY. OPS CHECK GOOD. IAW CE680A AMM 33-50-06. - [SDR DXTA2024121601516](https://openairdocs.org/sdr/DXTA2024121601516.md): Battery Pack · defective · Dec 13, 2024 · N520QS · Cessna 680A · Emergency Lighting > THE EMERGENCY LIGHTS ASSOCIATED WITH BATTERY PACK 4 ARE INOPERATIVE. UNABLE TO COMPLY WITH OPERATIONAL PROCEDURE OF MEL 33-50-03 CORRECTIVE ACTION; REPLACED #4 BATTERY PACK IAW CE-680A 33-50-06. OPS CHECK GOOD. - [SDR DXTA2024092200629](https://openairdocs.org/sdr/DXTA2024092200629.md): Connector · faulted · Sep 21, 2024 · N520QS · Cessna 680A · Door System Wiring > ON GROUND CABIN DOOR CAS MESSAGE ILLUMINATED. USED CHECKLIST FOR DOOR RESET WHICH WOULD NOT RESET. INSPECTED DOOR AND LOWER PINS STICK OUT 1/16" WHILE OTHER PINS ARE RECESSED IN DOOR FRAME. COMPLIED WITH MAIN CABIN DOOR HEALTH CHECK, POWER UP ACFT CLOSED - [SDR DXTA2023110399660](https://openairdocs.org/sdr/DXTA2023110399660.md): Battery · inoperative · Nov 3, 2023 · N520QS · Cessna 680A · Emergency Lighting > EMERG EXIT SIGN/LIGHT: CABIN MAIN DOOR UPPER EXIT SIGN DOES NOT LIGHT UP DURING PREFLIGHT TEST. PERFORMED T/SHOOTING AND FOUND NO2 EMERGENCY LIGHT BATTERY PACK INOP. REMOVED AND REPLACED NO EMERGENCY LIGHT BATTERY PACK WITH A CUSTOMER SUPPLIED REPAIRED PART. - [SDR DXTA2023051586130](https://openairdocs.org/sdr/DXTA2023051586130.md): Wire Harness · defective · May 15, 2023 · N520QS · Cessna 680A · Passenger/Crew Doors > MAIN DOOR WILL NOT OPEN ON GROUND FROM THE INSIDE. DOOR WILL OPEN FROM THE OUTSIDE ONLY. OPS CHEKCED THE DOOR AND VERIFIED THE RED BUTTON ON INSIDE DOOR HANDLE WILL NOT UNLOCK. INSPECTED WIRING AND AND HARNESS UNDER FOLDING STEP. FOUND HARNESS BACKSHELL CRAC - [SDR DXTA2023022781230](https://openairdocs.org/sdr/DXTA2023022781230.md): Handle · defective · Feb 24, 2023 · N520QS · Cessna 680A · Landing Gear Retraction/Extension System > MOVED GEAR HANDLE TO THE DOWN POSITION AND GEAR WOULD NOT EXTEND. FOLLOWED QRH AND EXTENDED THE GEAR WITH THE BLOWDOWN BOTTLE. GEAR CONTROL HANDLE REPLACED. UPON PLACING THE AIRCRAFT IN THE HANGAR NOTED HYDRAULIC FLUID DRIPPING FROM THE EMERGENCY GEAR BLOW D - [SDR DXTA2022112274540](https://openairdocs.org/sdr/DXTA2022112274540.md): Uplock Switch · faulted · Nov 22, 2022 · N520QS · Cessna 680A · Landing Gear Position and Warning > DURING VISUAL APPROACH, MLG SELECTED DOWN, MLG DISAGREE RT AMBER CAS ILLUM YELLOW X ON RT MLG INDICATOR. ABORTED APPROACH & RAN QRH, USING BLOWDOWN HANDLE. TOWER VERIFIED THE RT MLG DOWN. FLAP SELECTED TO FULL, RT MAIN INDICATOR TURNED RED & REMAINED. ACFT - [SDR DXTA2022030858150](https://openairdocs.org/sdr/DXTA2022030858150.md): None · none · Mar 7, 2022 · N520QS · Cessna 680A · Emergency Lighting > CABIN EMERG LIGHT: DURING EMERGENCY LIGHT TEST PRIOR TO STARTUP, THE EXIT SIGN ON THE AFT BULKHEAD AND THE EXIT SIGN BELOW THE LAV SEAT DID NOT LIGHT UP. MAIN BATTERY POWER WAS APPLIED FOR A FEW MINUTES, AND THEN REMOVED. AFTER REMOVING MAIN BATTERY POWER, THE - [SDR DXTA2022011054970](https://openairdocs.org/sdr/DXTA2022011054970.md): Not Reported · not reported · Jan 9, 2022 · N520QS · Cessna 680A · Passenger/Crew Doors > MAIN DOOR LIGHT DOES NOT EXTINGUISH. CREW CYCLED DOOR 5 TIMES. CREW IS ABLE TO OPEN DOOR WITHOUT PRESSING RED HANDLE BUTTON.// SIGNOFF// PERFORMED OPERATIONAL CHECK OF MAIN CABIN DOOR FROM INSIDE AND OUTSIDE, OPS CHECK FAILED, INTEROGATED ARES DATA THAT SHOWED - [SDR DXTA2022010354630](https://openairdocs.org/sdr/DXTA2022010354630.md): Not Reported · not reported · Jan 1, 2022 · N520QS · Cessna 680A · Emergency Lighting > EMERGENCY LIGHTS (FLOOR ILLUMINATION) UNDER SEAT 3 INOP WHEN CHECKING EMERGENCY LIGHTS. *** CORRECTIVE ACTION *** POWERED AIRCRAFT AND CONFIRMED WRITE-UP. ALLOWED EMERGENCY BATTERY PACKS TO CHARGE AND CHECKED TO SEE IF SEAT #3 WOULD LIGHT UP AND IT DID NOT. RE - [SDR 2021F00360](https://openairdocs.org/sdr/2021F00360.md): Stabilizer · corroded · Dec 17, 2021 · N520QS · Cessna 680A · Horizontal Stabilizer Structure > CORROSION ON RH HORIZONTAL STABILIZER UPPER SKIN. FORWARD OF ELEVATOR CLOSEOUT PANEL 352AC. REPAIRED MINOR CORROSION IAW TEXTRON AVIATION ENGINEERING MEMO DQ32843M1 DATED DECEMBER 13,2021 - [SDR 2021F00359](https://openairdocs.org/sdr/2021F00359.md): None · none · Dec 17, 2021 · N520QS · Cessna 680A · Empennage Structure > APU STINGER LH AND RH SKINS HAVE BUBBLING PAINT. REPAIRED IAW CESSNA TEXTRON AVIATION ENGINEERING MEMO DQ32785M1 DATED DECEMBER 13,2021 - [SDR DXTA2021092449410](https://openairdocs.org/sdr/DXTA2021092449410.md): Pcb · failed · Sep 24, 2021 · N520QS · Cessna 680A · Passenger/Crew Doors > MAIN DOOR: WHEN DOOR IS LIFTED WITH THE ELECTRIC MOTOR THE DOOR STOPS SHORT OF CLOSED THEN FALLS OPEN. WHEN MANUALLY CLOSED AND LATCHED WITH HANDLE CABIN DOOR OPEN CAS REMAINS ILLUMINATED AND AMBER DOOR OPEN LIGHT BELOW HANDLE ON DOOR REMAINS ILLUMINATED.*** - [SDR 2021F00116](https://openairdocs.org/sdr/2021F00116.md): Cover · corroded · May 12, 2021 · N520QS · Cessna 680A · Accessory Gearboxes > LH ENGINE AGB AFT COVER MOUNTING PAD CORROSION. ACCOMPLISHED PRATT & WHITNEY DAA2021-390-PW306D1-CN0111 DATED MAY 11, 2021; DEVIATION LETTER - ENGINE MODEL PW306D1 SERIAL NUMBER CN0111 (TTSN 3983.5 HOURS CYCLES: 2675) - ACCESSORY GEAR BOX TOUCH UP REPAIR. - [SDR 2021F00115](https://openairdocs.org/sdr/2021F00115.md): Cover · corroded · May 12, 2021 · N520QS · Cessna 680A · Accessory Gearboxes > RH ENGINE AGB AFT COVER MOUNTING PAD CORROSION. ACCOMPLISHED PRATT & WHITNEY DAA2021-391-PW306D1-CN0110 DATED MAY 11, 2021; DEVIATION LETTER - ENGINE MODEL PW306D1 SERIAL NUMBER CN0110 (TTSN 3983.5 HOURS CYCLES: 2675) - ACCESSORY GEAR BOX TOUCH UP REPAIR. - [SDR DXTA2020052653709](https://openairdocs.org/sdr/DXTA2020052653709.md): Uplock Switch · failed · May 25, 2020 · N520QS · Cessna 680A · Landing Gear Position and Warning > GEAR DISAGREE L AMBER CAS ILLUMINATED - DURING APPROACH, GEAR HANDLE PLACED IN THE DOWN POSITION. GEAR DISAGREE LEFT CAS MESSAGE (AMBER) AND AMBER X ILLUMINATION ON LEFT MAIN GEAR INDICATOR. COMPLETED GEAR DISAGREE L,R,N CHECKLIST. THEN COMPLETED GEAR WILL NOT - [SDR 2019FA0000234](https://openairdocs.org/sdr/2019FA0000234.md): Skin · chafed · Jul 29, 2019 · N520QS · Cessna 680A · Fuselage Main, Plate/Skin > LWR SKIN CHAFE FROM ANTI-ICE CROSS-FLOW VALVE. REF STANDARD REPAIR SR-680A-ATA53-22175; DATED: 7/19/2019. - [SDR DXTA2018011800488](https://openairdocs.org/sdr/DXTA2018011800488.md): Landing Gear · malfunctioned · Jan 17, 2018 · N520QS · Cessna 680CE · Nose/Tail Landing Gear > DURING DEPARTURE, THE GEAR RETRACTION AMBER CAS NOSE GEAR MISCOMPARE DISPLAYED, THEN WITHIN 5 SECONDS, THE NOSE GEAR RETRACTED WITH NORMAL INDICATIONS. AS FLIGHT CONTINUED AFTER ACCELERATING TO 250 KIAS NOSE GEAR EXTENDED WITH NO CAS BUT GEAR INDICATION SHOW - [SDR DXTA2018010200429](https://openairdocs.org/sdr/DXTA2018010200429.md): Uplock Switch · faulty · Dec 31, 2017 · N520QS · Cessna 680A · Landing Gear Position and Warning > GEAR DISAGREE-N" CAS MESSAGE AFTER GEAR RETRACTION. RAN CHECKLIST X2 EXTENDED GEAR NORMALLY. ADJUSTED NLG DOORS FOR PROPER CLEARANCE. REPLACED NOSE GEAR UPLOCK SWITCH AFTER EVALUATING ARES DOWNLOAD INFORMATION AND CONSULTING WITH TEAM LATITUDE. PERFORMED SEVER - [SDR DXTA2018010200002](https://openairdocs.org/sdr/DXTA2018010200002.md): Warning Message · false activation · Dec 31, 2017 · N520QS · Cessna 680CE · Landing Gear Position and Warning > GEAR DISAGREE-N CAS MESSAGE AFTER GEAR RETRACTION. RAN CHECKLIST X2 EXTENDED GEAR NORMALLY - [SDR DXTAT2PL6D005BZVX](https://openairdocs.org/sdr/DXTAT2PL6D005BZVX.md): Connector · contaminated · Aug 27, 2017 · N520QS · Cessna 680CE · Landing Gear System Wiring > WHEN SELECTING GEAR DOWN AT 160KTS, RECEIVED A GEAR DISAGREE LT AMBER CAS MESSAGE. COMPLETED GEAR DISAGREE CHECK LIST X2 AND EMERGENCY ABNORMAL LANDING GEAR WILL NOT EXTEND N1. AFTER LANDING, TAXIED IN WITH NO PROBLEM. STILL HAD DISAGREE L CAS MESSAGE AND RED ## 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 = 'N520QS' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N520QS/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.