# N503QS: 2016 Textron 680A - Status: Valid registration - Airframe: [Textron 680A](https://openairdocs.org/model/textron-680a) (registry code 2076814, 10 seats) - Engine: [Pratt & Whitney Canada PW306D](https://openairdocs.org/engine/pratt-whitney-canada-pw306d) (registry code 52041) - 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: 680A0040 - Year built: 2016 - Type: Fixed wing multi engine - Engine type: Turbo-fan - Airworthiness: Standard, transport - Airworthiness date: August 9, 2016 - Certificate issued: September 11, 2026 - Expires: September 30, 2033 - Mode S code: A64684 - Owner type: Co-owned, fractional ownership - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=503QS - Page: https://openairdocs.org/aircraft/N503QS 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 PW306D) None in force. ## Information bulletins (advisory) None matched. ## NTSB investigations None matched to N503QS. ## FAA accident and incident reports None matched to N503QS. ## Service difficulty reports (14) 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 DXTA2025062003932](https://openairdocs.org/sdr/DXTA2025062003932), Jun 17, 2025: SHUTOFF VALVE. FAULTED. WHEN STARTING ENGINES WITH APU RUNNING, APU BLEED AIR OFF, HEAVY SMELL OF JET EXHAUST IN CABIN AND COCKPIT. CREW NOTICED THAT WHEN THE APU BLEED AIR KNOB WAS SE - [SDR DXTA2025061603907](https://openairdocs.org/sdr/DXTA2025061603907), Jun 14, 2025: AIR FILTER. DIRTY. COCKPIT ODOR: WHEN STARTING ENGINES WITH APU RUNNING, HEAVY SMELL OF JET EXHAUST IN CABIN AND COCKPIT. APU BLEED WAS SELECTED OFF 2+ MINUTES PRIOR TO ENGINE STA - [SDR DXTA2024040811435](https://openairdocs.org/sdr/DXTA2024040811435), Apr 7, 2024: CONTACT. DIRTY. FLOOR LIGHT BELOW LAV INOP. DISCONNETED LAV FLOOR EMER LIGHT AND CLEANED CONTACT. RECONNECTED LIGHT AND CHECKED FOR PROPER OPERATION. LIGHT OPS CHECK GOOD. WEN - [SDR DXTA2023070389980](https://openairdocs.org/sdr/DXTA2023070389980), Jul 3, 2023: UNKNOWN. UNKNOWN. MAIN EXIT SIGN/LIGHT: THE LIGHTING ON THE EMERGENCY EXIT SIGN OVER THE MAIN CABIN DOOR IS INOP. REMOVED MED EMERGENCY EXIT SIGN AND INSTALLED NEW CONDITION MED - [SDR DXTA2023062889740](https://openairdocs.org/sdr/DXTA2023062889740), Jun 28, 2023: UNKNOWN. UNKNOWN. CABIN EMERG LIGHT: MAIN CABIN DOOR EMERGENCY LIGHT WILL NOT ILLUMINATE.//CORRECTIVE ACTION// PERFORMED OPS CHECK OF THE EMERGENCY LIGHTS AND EMERGENCY LIGHTS PO - [SDR DXTA2023053087270](https://openairdocs.org/sdr/DXTA2023053087270), May 30, 2023: UNKNOWN. UNKNOWN. EMERG EXIT SIGN/LIGHT: THE MCD EMERGENCY EXIT LIGHT WILL NOT ILLUMINATE//CORRECTIVE ACTION//REMOVED AND REPLACED FAULTY MAIN ENTRANCE DOOR EMERGENCY EXIT SIGN M - [SDR DXTA2023052486970](https://openairdocs.org/sdr/DXTA2023052486970), May 23, 2023: UNKNOWN. UNKNOWN. EMERGENCY EXIT SIGN AT ENTRY DOOR INOP. GAINED ACCESS TO DIODE DC2013 AND FOUND ENVIRONMENTAL SPICE NOT FULLY CRIMPED ON WHITE WIRE OF DC2013. RE-CRIMPED SPICE - [SDR DXTA2023051786360](https://openairdocs.org/sdr/DXTA2023051786360), May 16, 2023: RELAY. FAULTED. WITH THE EMER LTS ARMED AND THE PAX SAFETY SWITCH SELECTED OFF, THE CABIN EMERGENCY LIGHTS REMAIN ILLUMINATED. THE EMERGENCY LIGHTS EXTINGUISH PROPERLY WHEN THE - [SDR DXTA2022061363790](https://openairdocs.org/sdr/DXTA2022061363790), Jun 11, 2022: SIGN. DEFECTIVE. CABIN EMERG LIGHT: CABIN EMERGENCY/EXIT LIGHT OVER THE MAIN CABIN DOOR INOP. // SIGNOFF // VERIFIED DISCREPANCY. REMOVED EXIT LIGHT COVER AND FOUND THE LIGHT WA - [SDR DXTA2021110351350](https://openairdocs.org/sdr/DXTA2021110351350), Nov 2, 2021: DIODE. FAULTED. RIGHT EXTERIOR EMERG LIGHT: RIGHT FORWARD EXTERIOR EMERGENCY LIGHT DOES NOT ILLUMINATE WITH EMERGENCY LIGHTS ON OR WITH MAIN BATTERY ON AND PAX SAFETY LIGHT ON - [SDR 2020F00412](https://openairdocs.org/sdr/2020F00412), Sep 29, 2020: SKIN. CORRODED. APU STINGER SKIN DAMAGE (CORROSION). ACCOMPLISHED TEXTRON AVIATION ENGINEERING LETTER DQ27131M1, DATED SEPTEMBER 24, 2020; 680A-0040 (N503QS) APU STINGER SKIN D - [SDR 2020FA0000423](https://openairdocs.org/sdr/2020FA0000423), Sep 28, 2020: WEB. CRACKED. STANDARD REPAIR CRACK DAMAGE, NOSE LANDING GEAR WHEEL WELL (NWW), FRAME, WEB, AND DOUBLERS, FS 75. FIELD REPAIR SR-680A-ATA53-25890 REV- DATED 6/1/2020 WITH FAA - [SDR 2020F00128](https://openairdocs.org/sdr/2020F00128), Feb 6, 2020: SKIN. CORRODED. LEFT WING TRAILING EDGE DAMAGE (CORROSION) REF ENGINEERING MEMO DQ24615M1 DATED FEBRUARY 5, 2020. - [SDR DXTA2016122906350](https://openairdocs.org/sdr/DXTA2016122906350), Dec 29, 2016: WARNING MESSAGE. ACTIVATED. AFTER TAKE OFF, CAS MESSAGE FOR RT GEAR DISAGREE. RAN CHECKLIST, BLEW GEAR DOWN. PERFORMED A VISUAL INSPECTION OF THE AFFECTED AREAS AND THE AIRCRAFT. PERFORMED ## Service difficulty reports on N503QS not matched to an aircraft (4) They name N503QS, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft. - [SDR 2005FA0001481](https://openairdocs.org/sdr/2005FA0001481), Oct 4, 2005: DRAIN. CHAFED. RT HYDRAULIC PUMP CASE DRAIN HYDRAULIC LINE RUPTURED IN FLIGHT, DRAINING HYDRAULIC FLUID FROM THE AIRCRAFT SYSTEM. FOUND RT HYDRAULIC PUMP CASE DRAIN LINE CRACK - [SDR DXTA200500660](https://openairdocs.org/sdr/DXTA200500660), Apr 3, 2005: WARNING LIGHT. ILLUMINATED. ON CLIMBOUT, AFTER GEAR SELECTED UP, THREE RED UNSAFE LIGHTS SHOWED (LM, NOSE, RM) AS WELL AS THE GREEN RIGHT MAIN LIGHT. RETURNED FOR LANDING GEAR SELECTED DOW - [SDR DXTA200300121](https://openairdocs.org/sdr/DXTA200300121), Sep 19, 2003: COALESCER BAG. CONTAMINATED. ON CLIMB OUT AT 15,000 FT BROUGHT THRUST LEVERS TO IDLE AND CABIN BEGAN FILLING WITH SMOKE. REPLACED WATER SEPARATOR SOCK, AND LOWERED NR 2 ENG OIL PRESS IAW HA - [SDR DXTA200300064](https://openairdocs.org/sdr/DXTA200300064), Jul 7, 2003: ODOR. DETECTED. 1.5 HOURS INTO FLIGHT, DESCENDING OUT OF FL 410, CREW SMELLED A STRONG ODOR SIMILAR TO THE BURNING OF ELECTRICAL INSULATION. INSPECTED AIRCRTAFT INTERIOR AND CO ## 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 PW306D engine: https://openairdocs.org/engine/pratt-whitney-canada-pw306d.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.