# Service difficulty reports: N634QS, cancelled Aug 8, 2025 A list on [N634QS, cancelled Aug 8, 2025](https://openairdocs.org/deregistered/N634QS-2025-08-08.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR DXTA2025052103535](https://openairdocs.org/sdr/DXTA2025052103535.md): Eec · defective · May 17, 2025 · N634QS · Cessna 560XL · Fuel Controlling System > AT 80 KNOTS, THE EEC L ANNUNCIATOR ILLUMINATED WITH A LEFT ENGINE REDUCTION OF THRUST. TAKE OFF WAS ABORTED. CORRECTIVE ACTION; REPLACED DEFECTIVE EEC REF. 5455B EMM 71-00-00. NO DEFECTS NOTED. - [SDR DXTA2025050303336](https://openairdocs.org/sdr/DXTA2025050303336.md): Rheostat · failed · May 3, 2025 · N634QS · Cessna 560XL · Flight Compartment Lighting > COCKPIT FLOOD LIGHT: WITH APU RUNNING TRIED TO DIM THE FLOOD LIGHTS WITH THE RHEOSTAT KNOB. RESULTED IN A BRIGHT FLASH BEHIND THE KNOB, BURNING ODOR, AND THE CIRCUIT BREAKER POPPING CORRECTIVE ACTION: GAINED ACCESS TO FLOOD LIGHT RHEOSTAT BY REMOVING SWITCH PA - [SDR DXTA2025032002719](https://openairdocs.org/sdr/DXTA2025032002719.md): Windshield · failed · Mar 16, 2025 · N634QS · Cessna 560XL · Flight Compartment Windows > CAPTAIN COCKPIT WINDOW: CLIMBING THROUGH 30,000' PILOT SIDE FRONT WINDSHIELD SHATTERED. IT APPEARS TO BE THE OUTER PANE. CORRECTIVE ACTION; REPLACED FAILED PILOTS SIDE WINDSHIELD IAW CE560XLS MM 56-11-00. OPS AND LEAK CHECK GOOD. - [SDR DXTA2023072891840](https://openairdocs.org/sdr/DXTA2023072891840.md): Unknown · unknown · Jul 27, 2023 · N634QS · Cessna 560XL · Emergency Lighting > CABIN EMERG LIGHT: BOTH FORWARD AND AFT HALF OF THE EMERGENCY LIGHTING SYSTEM EXIT SIGNS APPEARED DIM. CHECKED LIGHTS ON EMERGENCY BATTERIES ONLY AND ALL LED EXIT SIGNS ARE UNLIT. PLEASE EVALUATE BOTH BATTERY PACKS FOR EMERGENCY LIGHTING. REMOVED DEFECTIVE A - [SDR DXTA2022112874890](https://openairdocs.org/sdr/DXTA2022112874890.md): Pin · out of adjust · Nov 26, 2022 · N634QS · Cessna 560XL · Passenger/Crew Doors > MAIN DOOR TELESCOPING ROD: ENTRY DOOR IS EXTREMELY DIFFICULT TO OPEN. THE DOOR PINS APPEAR TO NOT BE RETRACTING ALL THE WAY. // SIGNOFF// OPERATED THE DOOR AND DISCOVERED THE PINS BINDING AND A INTERFERENCE FIT ON THE TOP FWD SIDE OF THE DOOR. REMOVED THE DOOR - [SDR DXTA2022032959220](https://openairdocs.org/sdr/DXTA2022032959220.md): Not Reported · not reported · Mar 29, 2022 · N634QS · Cessna 560XL · Landing Gear Retraction/Extension System > NLG LANDING GEAR RETRACTION: INFLIGHT, AFTER GEAR RETRACTION RED UNLOCK LIGHT REMAINS ILLUMINATED. ALL 3 GREEN DOWN LIGHTS WERE EXTINGUISHED.//CORRECTIVE ACTION//JACKED UP AIRCRAFT. CHECKED NOSE STRUT EXTENSION AND FOUND TO BE AT THE CORRECT DIMENSION OF 9.1 - [SDR DXTA2022022156980](https://openairdocs.org/sdr/DXTA2022022156980.md): Uplock Switch · abnormal · Feb 18, 2022 · N634QS · Cessna 560XL · Landing Gear Position and Warning > NLG LANDING GEAR UNLOCK LIGHT: AFTER TAKEOFF WE GOT AN UNLOCK RED ANNUNCIATOR AFTER GEAR RETRACTION. SOON AFTER A STAB MISCOMPARE AND HYD PRESS AND MASTER CAUTION ANNUNCIATORS CAME ON. WE RAN THE GEAR ABNORMAL CHECKLIST. WE EXTENDED THE LANDING GEAR AND THE - [SDR DXTA2021032539970](https://openairdocs.org/sdr/DXTA2021032539970.md): Coalescer Bag · dirty · Mar 24, 2021 · N634QS · Cessna 560XL · Humidity Control System > AIR CONDITIONING COMPRESSOR: WITH APU BLEED AIR RUNNING, THERE WAS A DIRTY SOCK SMELL IN THE AFT CABIN AREA. POWERED UP AIRCRAFT WITH APU. CONFIRMED WITH APU BLEED AIR THERE IS A SMELL TO THE AIR COMING FROM THE DUCTS. ACCOMPLISHED TC-5XL-21-120902M ENVIRONME - [SDR DXTA2020120504436](https://openairdocs.org/sdr/DXTA2020120504436.md): Seal · malfunctioned · Dec 5, 2020 · N634QS · Cessna 560XL · Passenger/Crew Doors > MAIN CABIN DOOR WOULD NOT OPEN FOR APPROXIMATELY 3 MINUTES DUE TO ACOUSTIC SEAL NOT DEFLATING. WE WERE ABLE TO OPEN THE DOOR USING MORE FORCE THEN TYPICALLY NEEDED TO DEPLANE PAX. SIGN OFF. INSPECTED/CHECKED CABIN DOOR SEAL AND VALVE OPERATIONS, NO DEFECTS - [SDR DXTA2020082804031](https://openairdocs.org/sdr/DXTA2020082804031.md): Uplock Switch · out of adjust · Aug 28, 2020 · N634QS · Cessna 560XL · Landing Gear Position and Warning > AFTER TAKEOFF THE LANDING GEAR WOULD NOT RETRACT. THE RED UNLOCK LIGHT WAS ILLUMINATED AND THE GREEN NOSE GEAR LIGHT WERE ILLUMINATED, BUT THE LT AND RT GREEN LIGHTS WERE EXTINGUISHED. WE COMPLETED THE QRH AND NO CIRCUIT BREAKERS WERE POPPED. WE RETURNED TO - [SDR DXTA2019120603170](https://openairdocs.org/sdr/DXTA2019120603170.md): Unknown · odor · Dec 6, 2019 · N634QS · Cessna 560XL · Air Distribution System > DURING DEPARTURE WITH APU ON AND APU BLEED AIR ON, HAD A STRONG SMELL OF JET A COMING THRU VENTS IN CABIN. AND COCKPIT. WE SHUT THE APU AND BLEED AIR OFF AND SMELLED REMAINED. WE TURNED THE SOURCE TO OFF TO ISOLATE, THE SMELL OF JET A STOPPED AFTER SOURC - [SDR DXTA2017030206377](https://openairdocs.org/sdr/DXTA2017030206377.md): Coffeemaker · failed · Mar 2, 2017 · N634QS · Cessna 560XL · Buffet/Galleys > ON DESCENT INTO DESTINATION, SMELLED AN ODOR. ON SHUTDOWN THE COFFEE POT AS WELL AS THE WATER POT WERE EXTREMELY HOT WITH THE SWITCHES IN THE OFF POSITION. INSPECTED SWITCHES, WIRING AND CONNECTORS FOR UPPER AND LOWER HOT LIQUID TANKS. NO DEFECTS NOTED. FOUN - [SDR DXTA2016123006352](https://openairdocs.org/sdr/DXTA2016123006352.md): Outflow Valve · failed · Dec 29, 2016 · N634QS · Cessna 560XL · Pressure Regulator/Outflow Valve > AT FL400 CABIN ALTITUDE WARNING ILLUMINATED. CABIN ALT INCREASED TO FL 200. CABIN ALTITUDE STABILIZED PASSING 10000 FEET. ACCOMPLISHED PRESSURE CHECK OF SERVICE AIR SYSTEM AT OUTFLOW VALVE AND FOUND SYSTEM TO PROVIDE 23 PSI WHICH IS CORRECT. ACCOMPLISHED ELE - [SDR DXTA2016082606292](https://openairdocs.org/sdr/DXTA2016082606292.md): Engine · malfunctioned · Aug 26, 2016 · N634QS · Cessna 560XL · Engine (Turbine/Turboprop) > RIGHT ENGINE HAD A LOUD BANG AND RED LINED ITT AT ABOUT 500' AFTER TAKEOFF. REDUCED POWER TO IDLE. ENGINE CONTINUED TO RUN AT IDLE WITH AN ITT ABOUT 600 AND A LOUD WHINE. CONTINUED WITH IN FLIGHT PRECAUTIONARY SHUTDOWN. ENGINE VIBRATION ANNUNCIATOR WAS ALS - [SDR DXTA2015012605969](https://openairdocs.org/sdr/DXTA2015012605969.md): Unknown · odor · Jan 25, 2015 · N634QS · Cessna 560XL · Air Distribution System > AFTER ROTATION & TAKEOFF THERE WAS A STRONG PLASTIC SMELL THAT SEEMED TO BE COMING FROM WEMACS. APU WAS SHUT OFF PRIOR TO TAKEOFF. AT 2000' MSL RE-ENTERED THE PATTERN & LANDED UNEVENTFULLY. SMELLED SEEMED TO DISSIPATE WHEN WEIGHT WAS ON WHEELS. RAN APU WIT - [SDR DXTA2012042304957](https://openairdocs.org/sdr/DXTA2012042304957.md): Trimmer · loose · Apr 22, 2012 · N634QS · Cessna 560XL · Elevator Control System > AFTER TAKEOFF, ACFT WANTED TO PITCH UP EXCESSIVELY. WITH GEAR AND FLAPS UP AND APPROX 170 KIAS, YOKE REQUIRED APPROX 50LBS FORCE TO HOLD YOKE FORWARD. MANUALLY ROLLED PITCH TRIM WHEEL FULL FORWARD WHICH ZEROED CONTROL FORCES ON YOKE. AFTER LANDING FOUND PITC - [SDR DXTA2010112304317](https://openairdocs.org/sdr/DXTA2010112304317.md): Actuator · failed · Nov 22, 2010 · N634QS · Cessna 560XL · Landing Gear Actuator > ON TAXI OUT, GEAR WARNING SOUNDED. LOOKED DOWN AT THE GEAR POSITION INDICATIONS TO SEE THE RT GREEN GEAR LIGHT OUT, AND THE RED UNLOCK LIGHT ILLUMINATED. ACFT WAS STOPPED STRAIGHT AHEAD, WARNING HORN CEASED, AND AGAIN HAD 3 GREEN AND NO RED LIGHTS. ACFT WAS - [SDR DXTA2009120803888](https://openairdocs.org/sdr/DXTA2009120803888.md): Lamp · intermittent · Dec 8, 2009 · N634QS · Cessna 560XL · Landing Gear Position and Warning > ON APPROACH, LT MAIN GEAR DOWN INDICATOR DID NOT ILLUMINATE. ACCOMPLISHED ABNORMAL "GEAR WOULD NOT EXTEND" CHECKLIST. BOTTLE WAS DISCHARGED IAW CHECKLIST; UNEVENTFUL LANDING. NO LT GEAR INDICATION UNTIL AFTER LANDING. AN INSPECTION FOUND LT MAIN GEAR DOWN IN - [SDR DXTA2009102203821](https://openairdocs.org/sdr/DXTA2009102203821.md): Display · failed · Oct 21, 2009 · N634QS · Cessna 560XL · Central Display > PFD 1 FAIL ANNUNCIATOR ILLUMINATED INFLIGHT FOLLOWED BY FLICKERING PFD 1. SHORTLY THEREAFTER, DETECTED BURNED ELECTRICAL ODOR AND, AFTER LANDING, VISIBLE SMOKE. REMOVED PILOTS PFD AND FOUND IT TO SMELL SMOKEY INSIDE FROM VENT HOLES. REPLACED WITH REPAIRED UNI - [SDR DXTA200803147](https://openairdocs.org/sdr/DXTA200803147.md): Metering Valve · inoperative · Jun 27, 2008 · N634QS · Cessna 560CESSNA · Landing Gear Brake System > WHILE TAXIING, THE LT TOE BRAKE WENT TO THE FLOOR (LOSS OF LT TOE BRAKE) DURING A LT PIVOT TURN (FULL LT RUDDER) TO PARK ON THE RAMP. RT TOE BRAKE WAS NORMAL FROM LT SEAT. TROUBLESHOT TO BAD METERING VALVE. REMOVED BAD METERING VALVE AND INSTALLED A NEW BRAKE - [SDR CWQR200805](https://openairdocs.org/sdr/CWQR200805.md): Air Duct · cracked · Jun 2, 2008 · N634QS · Cessna 560XL · Pneumatic Distribution System > DURING A PHASE 1-4 INSPECTION THE PRECOOLER EXHAUST DUCT WELD ASSEMBLIES WERE FOUND TO BE CRACKED IN THE LEFT AND RIGHT PYLON. THE LEFT HAD TWO CRACKS AND THE RIGHT HAD THREE CRACKS. A SERVICE CONDITION REPORT HAS BEEN SENT TO CESSNA UNDER #362539 FOR THE LE - [SDR DXTA200702691](https://openairdocs.org/sdr/DXTA200702691.md): Brake Assy · malfunctioned · Dec 19, 2007 · N634QS · Cessna 560XL · Landing Gear Brake System > CO-PILOTS RT BRAKE FADES TO STOP AND WILL NOT HOLD. TAXIED AIRCRAFT AROUND RAMP AND PERFORMED SEVERAL BRAKE CHECKS USING PILOT'S AND CO-PILOT'S BRAKES WITH NO DEFECTS NOTED. MADE SEVERAL TURNS USING AIRCRAFT RUDDER PEDALS ONLY WITH NO DEFECTS BEING NOTED. IN - [SDR DXTA200702105](https://openairdocs.org/sdr/DXTA200702105.md): Indication Sys · malfunctioned · Apr 12, 2007 · N634QS · Cessna 560XL · Landing Gear Position and Warning > NO (GREEN) LIGHT ON RT MAIN LANDING GEAR UPON EXTENSION. EMERGENCY PROCEDURES FOLLOWED AND BOTTLE WAS BLOWN, STILL NO GREEN LIGHT. - [SDR DXTA200601780](https://openairdocs.org/sdr/DXTA200601780.md): Tire · damaged · Dec 4, 2006 · N634QS · Cessna 560XL · Tire > NOSE WHEEL HAS DAMAGED TREAD FOLLOWING SEVERE SHIMMY AT 40 KTS DURING TAKEOFF ROLL. NOSE WHEEL STEERING PIN WAS NOT INSTALLED. REMOVED AND REPLACED NOSE WHEEL AND TIRE ASSY IAW MM 32-41-01 SERVICED TIRE TO CORRECT PRESSURE. - [SDR DXTA200601525](https://openairdocs.org/sdr/DXTA200601525.md): Warning Light · illuminated · Jul 28, 2006 · N634QS · Cessna 560XL · Engine Oil Pressure > AT 85 KNOTS, LT ENGINE OIL PRESS ILLUMINATED ON T/O ROLL WITH MASTER WARN LIGHT. PSI INDICATED ZERO AND O/T ABORTED. TURNING OFF RUNWAY WITH ENGINES AT IDLE, BOTH ENGINES APPEARED TO HAVE NORMAL PSI. ENGINE WAS SHUTDOWN AFTER TURNING OFF RUNWAY. OIL LEVEL ## 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 = 'N634QS' AND deregistration_id = 'N634QS-2025-08-08' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/deregistered/N634QS-2025-08-08/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, except the copies of manufacturers’ service documents, which belong to their rights holders.