# N635QS: 2021 Textron 680A - Status: Valid registration - Airframe: [Textron 680A](https://openairdocs.org/model/textron-680a) (registry code 2076814, 10 seats) - Engine: [Pratt & Whitney Canada PW306D1](https://openairdocs.org/engine/pratt-whitney-canada-pw306d1) (registry code 51850) - Data sheets: [TCDS T00012WI](https://openairdocs.org/tcds/T00012WI) (Textron Aviation Inc.), [TCDS E35NE](https://openairdocs.org/tcds/E35NE) (Pratt & Whitney Canada Corp.) (OpenAirDocs) - Serial number: 680A0282 - Year built: 2021 - Type: Fixed wing multi engine - Engine type: Turbo-fan - Airworthiness: Standard, transport - Airworthiness date: September 22, 2021 - Certificate issued: October 16, 2026 - Expires: October 31, 2033 - Mode S code: A851BE - Owner type: Co-owned, fractional ownership - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=635QS - Page: https://openairdocs.org/aircraft/N635QS From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. ## ADs that may apply (OpenAirDocs): 3 in force ### Matched by airframe (Textron 680A) - [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026 - [AD 2023-10-02](https://openairdocs.org/ad/2023-10-02): Indicating/Recording System, Navigation · Boeing 18, 23, 35 and 1,060 more. Effective May 26, 2023 - [AD 2018-07-13](https://openairdocs.org/ad/2018-07-13): Landing Gear · Textron 510, 680 and 680A. Effective May 15, 2018 ### Matched by engine (Pratt & Whitney Canada PW306D1) None in force. ## Information bulletins (advisory) None matched. ## NTSB investigations None matched to N635QS. ## FAA accident and incident reports None matched to N635QS. ## Reports on N635QS not matched to an aircraft (1) They name N635QS, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft. - [Incident 20041207033049I](https://openairdocs.org/incident/20041207033049I), Dec 7, 2004: Cessna 560XL (N635QS), Omaha, NE. (-23) N635QS, operating as a 14 CFR 135 flight, was at cruise altitude when the crew received a low brake pressure/antiskid inop indication, and right gear… ## Service difficulty reports (4) As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR DXTA2026012806659](https://openairdocs.org/sdr/DXTA2026012806659), Jan 24, 2026: DOWNLOCK SWITCH. DEFECTIVE. WHEN RETRACTING GEAR AFTER TAKE OFF THE GEAR DISAGREE LT AMBER CAS MESSAGE CAME ON WITH A YELLOW X IN THE LT GEAR DISPLAY. REPLACED LT GEAR DOWNLOCK PROXIMITY S - [SDR DXTA2025123106361](https://openairdocs.org/sdr/DXTA2025123106361), Dec 29, 2025: TILLER. FAULTY. DURING TAXI OUT TILLER BOUND AND STUCK LEFT. HAD TO STOP THE AIRCRAFT IN ORDER FOR IT TO FREE UP. ALSO NOTICE DURING THE LANDING PHASE AT LOWER SPEEDS AIRCRAFT, - [SDR DXTA2025072204292](https://openairdocs.org/sdr/DXTA2025072204292), Jul 18, 2025: UPLOCK SWITCH. DEFECTIVE. LEFT MAIN GEAR HAS YELLOW X WHEN EXTENDED. RAN CHECKLIST AND GEAR STILL DOES NOT SHOW DOWN AND LOCKED. CORRECTIVE ACTION: REPLACED LH MLG UPLOCK SWITCH OPS CHEC - [SDR DXTA2023092896660](https://openairdocs.org/sdr/DXTA2023092896660), Sep 28, 2023: STARTER. FAULTED. DURING LEVEL FLIGHT 380 WE NOTICED THE RIGHT GEN OVERCHARGING AND AMPS VARYING BETWEEN 40 AND 80. RIGHT BATTERY WAS 10 DEGREES WARMER THEN LEFT. FUEL FLTR BYPAS ## Service difficulty reports on N635QS not matched to an aircraft (14) They name N635QS, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft. - [SDR 2020F00355](https://openairdocs.org/sdr/2020F00355), Aug 8, 2020: SKIN. DAMAGED. OVER TRAVEL DAMAGE TO RIGHT RUDDER SKIN AND VERTICAL SKIN AT THE ACTUATOR CUTOUT. - [SDR DXTA2014062505807](https://openairdocs.org/sdr/DXTA2014062505807), Jun 24, 2014: BRAKE. MALFUNCTIONED. DURING TAXI THE LT BRAKE IS VERY SENSITIVE & GRABBING. IT WAS OBSERVED DURING LANDING ROLLOUT & TAXI IN. BLED LT BRAKE SYSTEM, SERVICED BRAKE RESERVOIR. OPS AND - [SDR DXTA2012111905184](https://openairdocs.org/sdr/DXTA2012111905184), Nov 16, 2012: GCU. FAILED. ON THE GROUND WITH THE APU RUNNING AND GENERATOR ONLINE, THE COCKPIT LIGHT STARTED GETTING BRIGHT AND THE AVIONICS FAN STARTED SPEEDING UP. I SAW THE VOLTS RAPI - [SDR DXTA2012083005109](https://openairdocs.org/sdr/DXTA2012083005109), Aug 29, 2012: COALESCER BAG. CONTAMINATED. AFTER 10-15 MINUTES OF FLIGHT THERE IS AN ODOR (DIRTY DIAPER/OLD SOCKS) APPARENT IN THE CABIN THAT MOVES FORWARD TO THE COCKPIT. ODOR IS NOT NEAR THE FLOOR, ONL - [SDR DXTA2010052504102](https://openairdocs.org/sdr/DXTA2010052504102), May 18, 2010: LINE. MISINSTALLED. WHILE ACCOMPLISHING THE RUDDER BIAS CHECK, WHEN PUSHING RT THROTTLE UP, LT PEDAL ADVANCED. WHEN PUSHING LT THROTTLE UP, RT PEDAL ADVANCED. INSPECTED & FOUND LIN - [SDR DXTA090907002](https://openairdocs.org/sdr/DXTA090907002), Sep 7, 2009: GENERATOR. FAILED. DUAL GENERATOR FAILURE WITH ACCOMPANYING GEN ANNUNCIATOR L/R AND MASTER WARNING. FAILURE OCCURED WHILE CLIMBING THROUGH 15,000' WITH APU GEN ON AND LASTED 3-4 S - [SDR DXTA200702724](https://openairdocs.org/sdr/DXTA200702724), Dec 29, 2007: WHEEL. CRACKED. TRIM INDICATOR IS NOT INDEXED CORRECTLY. TRIM WAS CHECKED AND SET TO TAKEOFF RANGE BEFORE START. JUST PRIOR TO ENGINE START, BOTH PILOTS NOTICED TRIM INDICATOR - [SDR 2006FA0000472](https://openairdocs.org/sdr/2006FA0000472), May 2, 2006: FLOAT SWITCH. INOPERATIVE. THE RIGHT LOW FUEL LEVEL SYSTEM WAS INOPERATIVE. REMOVED SWITCH AND FOUND SIGNS OF ARCING ON THE TOP SIDE OF THE SWITCH. TROUBLESHOT FURTHER AND FOUND THE PC BO - [SDR DXTA200500832](https://openairdocs.org/sdr/DXTA200500832), Jul 10, 2005: RUDDER. MALFUNCTIONED. ON TAKEOFF ROTATION ACFT YAWED HARD TO LEFT. INSPECTED RIGGING OF RUDDER AND RUDDER TRIM SYSTEM. CHECKED CABLE TENSIONS AND TRAVELS. CHECK GOOD. INSPECTED RUDDE - [SDR DXTA200500577](https://openairdocs.org/sdr/DXTA200500577), Feb 4, 2005: WARNING SYSTEM. MALFUNCTIONED. WHILE IN DESCENT THE LT GREEN LANDING LIGHT CAME ON ALONG WITH THE "LO BRAKE PRESS" AND "ANTISKID INOP" ANNUNCIATORS & MASTER CAUTION. ALL LIGHTS WENT OUT AFTER - [SDR DXTA200400489](https://openairdocs.org/sdr/DXTA200400489), Dec 21, 2004: MODULE. FAILED. RIGHT GEAR LIGHT CAME ON DURING FLIGHT (GEAR HANDLE UP) FOLLOWED BY LOW BRAKE PRESS & ANTI SKID INOP CAUTION LIGHT ON. AFTER 20 MIN ALL 3 LIGHTS EXTINGUISHED, D - [SDR DXTA200400470](https://openairdocs.org/sdr/DXTA200400470), Dec 7, 2004: WARNING SYSTEM. ACTIVATED. LOW BRAKE PRESSURE/ANTISKID INOP (IN-FLIGHT) ANNUNCIATOR ILLUMINATED WITH RT GEAR LIGHT ILLUMINATED. CHECKLIST CONDUCTED EMERGENCY BRAKES USED. ITEM IS UNDER IN - [SDR DXTA200400370](https://openairdocs.org/sdr/DXTA200400370), Aug 21, 2004: STRUT. DAMAGED. ON GEAR RETRACTION RED UNLOCK LIGHT ON GEAR. EXTENDED GEAR, 3 GREENS, NO RED LANDED UNEVENTFULLY. TROUBLESHOT LANDING GEAR SYSTEM. FOUND NLG STRUT NOT EXTENDING - [SDR DXTA200400344](https://openairdocs.org/sdr/DXTA200400344), Jul 22, 2004: MOUNT. FAILED. AFTER TAKEOFF DOOR SEAL & CABIN DOOR ANNUNCIATOR ILLUMINATED, LOUD WIND NOISE FROM AROUND DOOR. ACCOMPLISHED AIR TURNBACK AND UPON LANDING THE MAIN ENTRANCE DOO ## STCs that may be installed (OpenAirDocs) (16) Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do. ### Approved for the airframe (Textron 680A) - [STC ST04765NY](https://openairdocs.org/stc/ST04765NY): Unprepared (Grass/Sod) Runway Operations. Textron Aviation Inc - [STC ST00885LA](https://openairdocs.org/stc/ST00885LA): Installation of fire extinguisher cartridges as replacements for Pacific Scientific fire extinguisher cartridges in fire extinguisher bottles. AMETEK AMERON, LLC d/b/a MASS Systems - [STC ST12344IB](https://openairdocs.org/stc/ST12344IB): Replacement of the Halon Type 1211 portable fire extinguisher with Halotron BrX portable fire extinguisher with Halotron BrX portable fire extinguisher. Cessna Duesseldorf Citation Service Center GmbH - [STC ST122244IB](https://openairdocs.org/stc/ST122244IB): Installation of Gogo Galileo system, including HDX Antenna. Alamo Engineering GmbH - [STC ST03885AT](https://openairdocs.org/stc/ST03885AT): Installation of an Avionica, Inc. avCM Cellular Module. Aircraft Systems and Manufacturing Inc - [STC ST11983SE](https://openairdocs.org/stc/ST11983SE): Installation of Starlink Aviation System. AeroMech Incorporated - [STC ST02472AT](https://openairdocs.org/stc/ST02472AT): Installation of a mini Quick Access Recorder (QAR) model MKI, MKII, or MKIII. Aircraft Systems and Manufacturing Inc - [STC ST01117DE](https://openairdocs.org/stc/ST01117DE): Installation of the Gogo ATG C1. Peregrine - [STC ST02037WI](https://openairdocs.org/stc/ST02037WI): Installation of Gogo Business Aviation AVANCE L5 System with MB 13 Antennas. Duncan Aviation Inc - [STC ST04736NY](https://openairdocs.org/stc/ST04736NY): True Blue TS28 Emergency Battery Power Supply Replacement. Aerospace Design and Compliance LLC - [STC ST01936WI](https://openairdocs.org/stc/ST01936WI): Installation of LED lights. AeroLED's Holdings LLC - [STC ST04575AT](https://openairdocs.org/stc/ST04575AT): Installation of the Rockwell Collins ALT-1000+/ -4000+ with 5G Filtering. Chippewa Aerospace Inc - [STC ST04367CH](https://openairdocs.org/stc/ST04367CH): Installation of a Medical Interior in accordance with LifePort Master Data List EGR-887-000-001, Revision (B), dated April 18, 2019 or later FAA approved revision and LifePort Master Drawing List MDL-887-00, Revision (D), dated April 11, 2019 or later FAA approved revision.". LifePort LLC - [STC ST01027DE](https://openairdocs.org/stc/ST01027DE): Installation of MarathonNorco Aerospace Inc Nickel Cadmium battery in place of existing Nickel Cadmium main aircraft battery/batteries. MarathonNorco Aerospace Inc - [STC ST11071SC](https://openairdocs.org/stc/ST11071SC): Demonstration of aircraft critical equipment and antenna systems tolerance of radio frequency interference (RFI) from intentional or spurious transmissions from certain Portable Electronic Devices (PEDs). Liberty Partners Inc - [STC ST11168SC](https://openairdocs.org/stc/ST11168SC): Installation of a Pratt & Whitney Flight Data Acquisition, Storage, and Transmission System (FAST). Pratt & Whitney Engine Services Inc ## Related - Other Textron 680A aircraft: https://openairdocs.org/model/textron-680a/aircraft.md - The Pratt & Whitney Canada PW306D1 engine: https://openairdocs.org/engine/pratt-whitney-canada-pw306d1.md --- 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.