# N645QS: 2019 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: 680A0194
- Year built: 2019
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: May 6, 2019
- Certificate issued: June 30, 2026
- Expires: June 30, 2033
- Mode S code: A8793D
- Owner type: Co-owned, fractional ownership
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=645QS
- Page: https://openairdocs.org/aircraft/N645QS

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 N645QS.

## FAA accident and incident reports

None matched to N645QS.

## Service difficulty reports (12)

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 DXTA2026020206736](https://openairdocs.org/sdr/DXTA2026020206736), Jan 29, 2026: DOWNLOCK SWITCH. DEFECTIVE. AFTER TAKEOFF AND SELECTING THE GEAR UP, RECEIVED AN AMBER GEAR DISAGREE N CAS MESSAGE. THE NOSE GEAR REMAINED DOWN AND LOCKED. AFTER TROUBLESHOOTING, R & R FAU
- [SDR DXTA2025071804268](https://openairdocs.org/sdr/DXTA2025071804268), Jul 15, 2025: RELAY. FAULTED. FLAPS FAIL CAS MESSAGE WHEN MOVING THE FLAPS POSITION SWITCH FROM UP TO 1 ON APPROACH AT 3000FT. FLAPS REMAINED IN UP POSITION. RAN QRH AND QRC PROCEDURES, FLAP
- [SDR DXTA2025052803647](https://openairdocs.org/sdr/DXTA2025052803647), May 26, 2025: WIRE HARNESS. DAMAGED. MAIN DOOR WOULD NOT CLOSE NORMALLY, HAD TO DO ABNORMAL SEVERAL TIMES. DOOR IS NOW CLOSED. REPEAT WRITE UP. REMOVED DAMAGED MAIN DOOR WIRE HARNESS AND REPLACED W
- [SDR DXTA2025052703614](https://openairdocs.org/sdr/DXTA2025052703614), May 23, 2025: MOTOR. TRIPPED. MAIN DOOR: AFTER POST-FLIGHT OF AIRCRAFT, THE MAIN CABIN DOOR DOES NOT CLOSE FROM EITHER INSIDE OR OUTSIDE OF AIRCRAFT. DOOR WAS THEN MANUALLY DISENGAGED FROM T
- [SDR DXTA2025043003258](https://openairdocs.org/sdr/DXTA2025043003258), Apr 28, 2025: ADC. FAULTED. DURING CLIMB BOTH ON ADC 2 MESSAGE DISPLAYED. COMPLIED WITH QRH. ALSO NOTED A SLIGHT RUDDER KICK PASING THROUGH 17,000'. REPEAT WRITEUP. REMOVED #1 ADC GDC7400 
- [SDR DXTA2025042803216](https://openairdocs.org/sdr/DXTA2025042803216), Apr 25, 2025: ADC. MALFUNCTIONED. BOTH ON ADC 2 AMBER CAS: RECEIVED BOTH ON ADC2 MESSAGE AFTER TAKEOFF. SELECTED LEFT SIDE TO ADC 1 AND IT REVERTED BACK TO ADC2. MESSAGE REMAINED THROUGH OUT LAN
- [SDR DXTA2024020510807](https://openairdocs.org/sdr/DXTA2024020510807), Feb 4, 2024: LIGHT. DIM. RH OVERWING EMER LIGHT BARELY ILLUMINATES. (FOUND DURING MX) REMOVED OVERWING CENTER PANEL, REMOVED LIGHT ASSV, INSTALLED NEW EMERGENCY LIGHT ASSY AND PERFORMED
- [SDR DXTA2023081693220](https://openairdocs.org/sdr/DXTA2023081693220), Aug 16, 2023: SENSOR. DEFECTIVE. ACM BLD LEAK AMBER CAS: NEAR DESCEND LEVEL OFF AT FL350 ACM BLD LEAK AMBER CAS ILLUMINATED FOLLOWED BY AMBER EMER PRESS CAS. QRC ACCOMPHISHED RESULTING IN AN EM
- [SDR DXTA2023042584860](https://openairdocs.org/sdr/DXTA2023042584860), Apr 25, 2023: BATTERY. INOPERATIVE. EMERGENCY LIGHTING: EMER LIGHTS DO NOT WORK IN THE ARM POSITION. REMOVED AND REPLACED EMER BATTERY P/N CBS28-1 S/N 2678M DUE TO NO LONGER HOLDING A CHARGE. WORK
- [SDR DXTA2023041884490](https://openairdocs.org/sdr/DXTA2023041884490), Apr 18, 2023: UPLOCK SWITCH. DEFECTIVE. ON APPROACH, MLG DOWN & RECEIVED AMBER CAS MLG DIAGREE L CAS MESSAGE & X OVER GRAY CROSS HATCHING ON MFD LT MLG INDICATOR. EXECUTED GO AROUND & RAN QRH PRCEDURE
- [SDR DXTA2022112874850](https://openairdocs.org/sdr/DXTA2022112874850), Nov 26, 2022: WIRE HARNESS. DAMAGED. MAIN DOOR: AFTER LANDING A FAINT CLICK WAS HEARD BY BOTH CREW MEMBERS FROM THE CABIN DOOR AREA FOLLOWED BY "CABIN DOOR" MESSAGE. RECYCLING THE DOOR NOTICED COND
- [SDR DXTA2022071866180](https://openairdocs.org/sdr/DXTA2022071866180), Jul 17, 2022: BATTERY PACK. INOPERATIVE. FLOOR EMERG EXIT LIGHT: FLOOR EMERGENCY LIGHTS AT SEATS 5 AND 8 DO NOT ILLUMINATE. OVERHEAD SEAT LIGHTS AT SEATS 3 AND 7 ALSO DO NOT ILLUMINATE. *** CORRECTIVE 

## Service difficulty reports on N645QS not matched to an aircraft (13)

They name N645QS, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR CWQR.2011.11](https://openairdocs.org/sdr/CWQR.2011.11), Apr 27, 2011: ANGLE. CRACKED. THE CRACKED APU CONTAINMENT BOX ANGLES WERE FOUND DURING APU REPLACEMENT. BOTH ANGLES WERE FOUND CRACKED PAST THE LAST RIVET IN THE BEND RADIUS.
- [SDR DXTA2008102703317](https://openairdocs.org/sdr/DXTA2008102703317), Oct 24, 2008: ACTUATOR. FAULTED. WITH GEAR HANDLE IN UP, NOSE GEAR GREEN LIGHT INDICATED GEAR DOWN. EMERGENCY GEAR EXTENSION PROCEDURE WAS COMPLETED (GEAR BLOW DOWN). WHEN GEAR WAS SELECTED DOW
- [SDR DXTA200808243240](https://openairdocs.org/sdr/DXTA200808243240), Aug 24, 2008: ACM. INOPERATIVE. ON THE GROUND FIRST FLIGHT OF THE DAY. APU RUNNING ELECTRIC LOAD NORMAL, SELECTED BLEED VALVE OPEN ON APU, AT THAT TIME WE HEARD A DIFFERENT WHINING SOUND THAT 
- [SDR DXTA200802792](https://openairdocs.org/sdr/DXTA200802792), Jan 24, 2008: SWITCH. INOPERATIVE. HAD A (NO TAKEOFF) ANNUN AFTER ADDING TO THRUST AND REACHING APPROX 30 KTS, THE LIGHT CAME ON ALONG WITH HORN. ABORTED TAKEOFF. REMOVED LT SPEEDBRAKE SWITCH P/N
- [SDR DXTA200601806](https://openairdocs.org/sdr/DXTA200601806), Dec 18, 2006: CABLE. UNKNOWN. MAIN CABIN DOOR WILL NOT OPEN COMPLETELY, EGRESS THRU EMERGENCY EXIT ON FBO RAMP. REMOVED AFT MAIN CABIN DOOR COUNTER-BALANCE CABLE ASSEMBLY P/N 6211297-24CR AN
- [SDR DXTA200601477](https://openairdocs.org/sdr/DXTA200601477), Jul 4, 2006: CAM. OUT OF ADJUST. AFTER GEAR RETRACTION ON TAKEOFF, ALL THREE GREEN GEAR DOWN INDICATORS WENT OUT BUT RED UNLOCK LIGHT REMAINED ON RECYCLED GEAR DOWN RED UNLOCK LIGHT WENT OUT, 3
- [SDR DXTA200601184](https://openairdocs.org/sdr/DXTA200601184), Jan 6, 2006: BRACKET. CRACKED. THE GREEN BRACKET THAT CONNECTS THE ACM TO THE AIRCRAFT HAS ABOUT A 4.5 INCH CRACK BETWEEN THE BOLTS THAT CONNECT ACM & THE RIVETS THAT CONNECT THE BRACKET TO T
- [SDR DXTA200501095](https://openairdocs.org/sdr/DXTA200501095), Nov 18, 2005: POSITION SWITCH. OUT OF ADJUST. NO TAKEOFF ANNUNCIATOR ILLUMINATED ON TAKEOFF ROLL, AND WILL NOT GO OUT. VERIFIED DISCREPANCY. NOTED STAB ACTUATOR, NO TAKEOFF, SWITCH OUT OF ADJUSTMENT. ADJUST
- [SDR DXTA200500811](https://openairdocs.org/sdr/DXTA200500811), Jun 29, 2005: ACTUATOR. OUT OF ADJUST. AFTER TAKEOFF AND RETRACTING GEAR AND FLAPS-GEAR UNLOCK (RED) LIGHT REMAINED LIT AND STAB MISCOMPARE LIGHT CAME ON. ADJUSTED LT MAIN LANDING GEAR ACTUATOR IAW M
- [SDR DXTA200500544](https://openairdocs.org/sdr/DXTA200500544), Jan 20, 2005: SUPPORT BRACKET. CRACKED. THE RIGHT SIDE SUPPORT BRACKET IS CRACKED C/T THE ECM. REMOVED AND REPLACED BRACKET REF 560XL IPC 21-51-00 AND 560XL SRM 51-40-03.
- [SDR DXTA200500543](https://openairdocs.org/sdr/DXTA200500543), Jan 19, 2005: ATTACH BRACKET. CRACKED. ACM SUPPORT BRACKET CRACKED WHERE RUDDER BIAS CONTROL VALVE ATTACHES. REMOVED AND REPLACED THE CRACKED BRACKET IAW THE 560 XL MM 21-50-00 SRM 51-40-03; 04; 06; 
- [SDR DXTA200400448](https://openairdocs.org/sdr/DXTA200400448), Nov 15, 2004: CONTROLLER. INOPERATIVE. DURING T/O ROLL, AT 70 KIAS A LOUD BANG FROM TAIL AREA FOLLOWED BY A PRESSURE BUMP. STRONG SMOKE ODOR, NONE VISIBLE. COULDN’T DETERMINE WHERE SMOKE ODOR WAS COM
- [SDR DXTA200300193](https://openairdocs.org/sdr/DXTA200300193), Nov 24, 2003: CONTROL CABLE. BROKEN. PERFORMED AILERON WING CABLE INSPECTION PER CESSNA ASL560XL-27-12, FOUND CABLES CHAFED/BROKEN BEYOND MANUFACTURER'S LIMITS. REMOVED AND REPLACED LT AND RT WING 

## 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

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