# N520QS: 2016 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: 680A0056
- Year built: 2016
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: December 2, 2016
- Certificate issued: December 10, 2021
- Expires: December 31, 2028
- Mode S code: A68A5D
- Owner type: Co-owned, fractional ownership
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=520QS
- Page: https://openairdocs.org/aircraft/N520QS

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 N520QS.

## NTSB investigations on N520QS not matched to an aircraft (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB LAX04LA334](https://openairdocs.org/ntsb/LAX04LA334), Sep 11, 2004: British Aerospace BAE 125-1000A (N520QS), San Francisco, CA, substantial damage. Probable cause: An electrical arc from an undetermined source initiated a hydraulic line rupture, which resulted in an equipment bay fire.

## FAA accident and incident reports

None matched to N520QS.

## Reports on N520QS not matched to an aircraft (1)

They name N520QS, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Accident 20040911024919A](https://openairdocs.org/incident/20040911024919A), Sep 11, 2004: Braero BAE1251000A (N520QS), San Francisco, CA, Substantial damage. (-23) Aircraft experienced an APU equipment bay fire while holding short of the runway for take off.

## Service difficulty reports (23)

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 DXTA2026040707541](https://openairdocs.org/sdr/DXTA2026040707541), Apr 4, 2026: PRESSURE SWITCH. DEFECTIVE. 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 
- [SDR DXTA2026010206379](https://openairdocs.org/sdr/DXTA2026010206379), Dec 30, 2025: BATTERY. TRIPPED. 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 W
- [SDR DXTA2025010801865](https://openairdocs.org/sdr/DXTA2025010801865), Jan 6, 2025: BATTERY. DEFECTIVE. 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. CORR
- [SDR DXTA2024121601516](https://openairdocs.org/sdr/DXTA2024121601516), Dec 13, 2024: BATTERY PACK. DEFECTIVE. 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 
- [SDR DXTA2024092200629](https://openairdocs.org/sdr/DXTA2024092200629), Sep 21, 2024: CONNECTOR. FAULTED. 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 PI
- [SDR DXTA2023110399660](https://openairdocs.org/sdr/DXTA2023110399660), Nov 3, 2023: BATTERY. INOPERATIVE. 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 
- [SDR DXTA2023051586130](https://openairdocs.org/sdr/DXTA2023051586130), May 15, 2023: WIRE HARNESS. DEFECTIVE. 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 
- [SDR DXTA2023022781230](https://openairdocs.org/sdr/DXTA2023022781230), Feb 24, 2023: HANDLE. DEFECTIVE. 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. UPO
- [SDR DXTA2022112274540](https://openairdocs.org/sdr/DXTA2022112274540), Nov 22, 2022: UPLOCK SWITCH. FAULTED. 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. TOWE
- [SDR DXTA2022030858150](https://openairdocs.org/sdr/DXTA2022030858150), Mar 7, 2022: NONE. NONE. 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 B
- [SDR DXTA2022011054970](https://openairdocs.org/sdr/DXTA2022011054970), Jan 9, 2022: NOT REPORTED. NOT REPORTED. 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 C
- [SDR DXTA2022010354630](https://openairdocs.org/sdr/DXTA2022010354630), Jan 1, 2022: NOT REPORTED. NOT REPORTED. EMERGENCY LIGHTS (FLOOR ILLUMINATION) UNDER SEAT 3 INOP WHEN CHECKING EMERGENCY LIGHTS. *** CORRECTIVE ACTION *** POWERED AIRCRAFT AND CONFIRMED WRITE-UP. ALLOW
- [SDR 2021F00360](https://openairdocs.org/sdr/2021F00360), Dec 17, 2021: STABILIZER. CORRODED. CORROSION ON RH HORIZONTAL STABILIZER UPPER SKIN. FORWARD OF ELEVATOR CLOSEOUT PANEL 352AC. REPAIRED MINOR CORROSION IAW TEXTRON AVIATION ENGINEERING MEMO DQ328
- [SDR 2021F00359](https://openairdocs.org/sdr/2021F00359), Dec 17, 2021: NONE. NONE. 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), Sep 24, 2021: PCB. FAILED. 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 O
- [SDR 2021F00116](https://openairdocs.org/sdr/2021F00116), May 12, 2021: COVER. CORRODED. LH ENGINE AGB AFT COVER MOUNTING PAD CORROSION. ACCOMPLISHED PRATT & WHITNEY DAA2021-390-PW306D1-CN0111 DATED MAY 11, 2021; DEVIATION LETTER - ENGINE MODEL PW30
- [SDR 2021F00115](https://openairdocs.org/sdr/2021F00115), May 12, 2021: COVER. CORRODED. RH ENGINE AGB AFT COVER MOUNTING PAD CORROSION. ACCOMPLISHED PRATT & WHITNEY DAA2021-391-PW306D1-CN0110 DATED MAY 11, 2021; DEVIATION LETTER - ENGINE MODEL PW30
- [SDR DXTA2020052653709](https://openairdocs.org/sdr/DXTA2020052653709), May 25, 2020: UPLOCK SWITCH. FAILED. GEAR DISAGREE L AMBER CAS ILLUMINATED - DURING APPROACH, GEAR HANDLE PLACED IN THE DOWN POSITION. GEAR DISAGREE LEFT CAS MESSAGE (AMBER) AND AMBER X ILLUMINATIO
- [SDR 2019FA0000234](https://openairdocs.org/sdr/2019FA0000234), Jul 29, 2019: SKIN. CHAFED. 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), Jan 17, 2018: LANDING GEAR. MALFUNCTIONED. DURING DEPARTURE, THE GEAR RETRACTION AMBER CAS NOSE GEAR MISCOMPARE DISPLAYED, THEN WITHIN 5 SECONDS, THE NOSE GEAR RETRACTED WITH NORMAL INDICATIONS. AS FLIGH
- [SDR DXTA2018010200429](https://openairdocs.org/sdr/DXTA2018010200429), Dec 31, 2017: UPLOCK SWITCH. FAULTY. GEAR DISAGREE-N" CAS MESSAGE AFTER GEAR RETRACTION. RAN CHECKLIST X2 EXTENDED GEAR NORMALLY. ADJUSTED NLG DOORS FOR PROPER CLEARANCE. REPLACED NOSE GEAR UPLOCK 
- [SDR DXTA2018010200002](https://openairdocs.org/sdr/DXTA2018010200002), Dec 31, 2017: WARNING MESSAGE. FALSE ACTIVATION. GEAR DISAGREE-N CAS MESSAGE AFTER GEAR RETRACTION. RAN CHECKLIST X2 EXTENDED GEAR NORMALLY
- [SDR DXTAT2PL6D005BZVX](https://openairdocs.org/sdr/DXTAT2PL6D005BZVX), Aug 27, 2017: CONNECTOR. CONTAMINATED. 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 WIL

## Service difficulty reports on N520QS not matched to an aircraft (3)

They name N520QS, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR DXTA200400389](https://openairdocs.org/sdr/DXTA200400389), Sep 11, 2004: SMOKE. DETECTED. DURING TAXI OUT FOR A REPOSITION FLIGHT, THE AUX AND PAC WARNING LIGHT CAME ON, FOLLOWED BY THE REAR BAGGAGE SMOKE WARNING LIGHT. SMOKE BEGAN TO FILL THE CABIN 
- [SDR 97ZZZX35](https://openairdocs.org/sdr/97ZZZX35), Nov 11, 1996: AUX VALVE. MALFUNCTION. AUX VALVE WILL NOT STAY OPEN. FOUND MALFUNCTIONING AUX VALVE.
- [SDR 95ZZZX518](https://openairdocs.org/sdr/95ZZZX518), Jan 4, 1995: FEED LINE. BURNED. FOUND DURING PRE-FLIGHT. APU FUEL FEED HOSE WAS BURNED THROUGH THE PLASTIC SHIELD AND INTO THE HOSE INSULATION. BLEEDAIR FROM LEFT MIXER VALVE IS BURNING THE AP

## 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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