# N639QS: 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: 680A0193 - Year built: 2019 - Type: Fixed wing multi engine - Engine type: Turbo-fan - Airworthiness: Standard, transport - Airworthiness date: April 25, 2019 - Certificate issued: July 14, 2026 - Expires: July 31, 2033 - Mode S code: A8609A - Owner type: Co-owned, fractional ownership - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=639QS - Page: https://openairdocs.org/aircraft/N639QS From the FAA registry file of October 27, 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 N639QS. ## FAA accident and incident reports None matched to N639QS. ## Service difficulty reports (11) 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 DXTA2026081209223](https://openairdocs.org/sdr/DXTA2026081209223), Aug 9, 2026: UPLOCK SWITCH. FAULTED. ON GEAR RETRACTION. WE RECEIVED A AMBER CAS GEAR DISAGREE RT. GEAR BOX INDICATION SHOWED YELLOW BOX, BLACK LETTER -DN- ON RT GEAR. FOLLOW THE QRC, GEAR CAME DOW - [SDR DXTA2026032307378](https://openairdocs.org/sdr/DXTA2026032307378), Mar 23, 2026: LINK. CORRODED. RT TRAILING LINK PITTING FOUND DURING SL680A-32-11. PERFORMED EDDY CURRENT INSPECTION. NO CRACKS FOUND. OPS CHECK GOOD. IAW CE680A NDTM REV 8 APR 1, 2025 - [SDR DXTA2026032307377](https://openairdocs.org/sdr/DXTA2026032307377), Mar 21, 2026: LINK. CORRODED. LT TRAILING LINK BARREL PITTING CORRECTIVE ACTION: PERFORMED EDDY CURRENT INSPECTION. NO CRACKS FOUND. OPS CHECK GOOD. IAW CE680A NDTM REV 8 APR 1, 2025 - [SDR DXTA2025122206164](https://openairdocs.org/sdr/DXTA2025122206164), Dec 17, 2025: STARTER GEN. DAMAGED. DURING ENGS START, APU DRAW REACHED 1100 AMPS MOMENTARILY & REMAINED ABOVE 700 FOR THE DURATION OF PROCESS WHILE BATTERIES BARELY CONTRIBUTED TO START. AFTER SE - [SDR DXTA2025012002000](https://openairdocs.org/sdr/DXTA2025012002000), Jan 16, 2025: WIRE HARNESS. FAILED. PASSENGER / CREW DOORS: CABIN DOOR OPEN CAS MESSAGE WOULD NOT CLEAR WITH CABIN DOOR CLOSED. ALL LATCHES WERE CONFIRMED ENGAGED. RAN QRH PROCEDURE AND WOULD NOT - [SDR DXTA2023092796610](https://openairdocs.org/sdr/DXTA2023092796610), Sep 26, 2023: CHARGER. INOPERATIVE. DURING PREFLIGHT WITH EMER LTS SWITCH IN ARM, THE AFT BULKHEAD EXIT SIGN AND THE UNDER LAV EXIT SIGN WILL NOT ILLUMINATE. WITH THE SWITCH IN ON, NO LIGHTS WILL - [SDR DXTA2023041384110](https://openairdocs.org/sdr/DXTA2023041384110), Apr 12, 2023: PCB. DEFECTIVE. MAIN DOOR HANDLE WILL NOT OPEN FROM THE OUTSIDE WITH BATTERIES CONNECTED WORKS NORMALLY FROM THE INSIDE OR WITH THE BATTERIES DISCONNECTED. REMOVED AND REPLACED - [SDR DXTA2022031458350](https://openairdocs.org/sdr/DXTA2022031458350), Mar 11, 2022: DOOR. BINDING. MAIN DOOR: REPEAT WRITE UP. THE MAIN CABIN DOOR IS DIFFICULT TO CLOSE. IT STOPS JUST SHORT OF COMPLETELY CLOSING DURING THE LIFT SEQUENCE. // SIGNOFF// INSPECTI - [SDR 2022F00118](https://openairdocs.org/sdr/2022F00118), Nov 11, 2021: SKIN. CHAFED. CHAFE ON THE FUSELAGE SKIN FROM THE CROSS-OVER VALVE. - [SDR 2021F00399](https://openairdocs.org/sdr/2021F00399), Nov 10, 2021: NONE. DENTED. REPAIR OF RH WING LEADING EDGE DENTS. TEXTRON AVIATION ENGINEERING REPAIR LETTER DQ32339M1 DATED: 11/9/2021, WING (RIGHT) LEADING EDGE DAMAGE/GOUGE. - [SDR DXTA2021102650920](https://openairdocs.org/sdr/DXTA2021102650920), Oct 25, 2021: SEAL. DEFECTIVE. MAIN DOOR: DOOR SQUEAL IN CLIMBOUT / DESCENT FOR A SHORT PERIOD OF TIME. MAIN CABIN DOOR ALSO HARD TO OPEN AND CLOSE. // SIGNOFF // MAIN CABIN DOOR SEAL CHANGED ## Service difficulty reports on N639QS not matched to an aircraft (35) They name N639QS, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft. - [SDR DXTA2009041303590](https://openairdocs.org/sdr/DXTA2009041303590), Apr 12, 2009: MASTER CYLINDER. MALFUNCTIONED. ON LANDING ROLLOUT, CAPTAINS LT BRAKE PEDAL WOULD GO ALL THE WAY TO THE FLOOR AND GRAB VERY LITTLE. REMOVED FAULTY PILOTS LEFT MASTER CYLINDER AND INSTALLED NEW - [SDR DXTA2009030503528](https://openairdocs.org/sdr/DXTA2009030503528), Mar 5, 2009: MASTER CYLINDER. INOPERATIVE. NO RESISTANCE ON CAPTAINS SIDE LEFT BRAKE PEDAL. REMOVED AND REPLACED PILOTS LT MASTER CYL WITH O/H UNIT. BLED BRAKE SYSTEM LEAK CHECK GOOD, TAXI CHECK BRAKE OP - [SDR DXTA2009030403528](https://openairdocs.org/sdr/DXTA2009030403528), Mar 4, 2009: MASTER CYLINDER. INOPERATIVE. REMOVED AND REPLACED PILOTS LT MASTER CYL WITH O/H UNIT. BLED BRAKE SYSTEM LEAK CHECK GOOD, TAXI CHECK BRAKE OPS, CHECK GOOD, ALL 4 BRAKE PEDALS ARE FIRM. WORK - [SDR DXTA200811303381](https://openairdocs.org/sdr/DXTA200811303381), Nov 30, 2008: WIRE. BURNED. WITH APU OPERATING AND AVIONICS SWITCH ON, NOTICED A BURNING ODOR, THEN RED X'S ON BOTH SIDES OF NR 1 PFD, A NR 1 ADC FAIL MESSAGE. PULLED NR 1 ADC CB, ODOR CEA - [SDR DXTA2008120103381](https://openairdocs.org/sdr/DXTA2008120103381), Nov 30, 2008: UNKNOWN. ODOR. WITH APU OPERATING AND AVIONICS SWITCH ON I NOTICED A BURNING ODOR. - [SDR DXTA200802816](https://openairdocs.org/sdr/DXTA200802816), Jan 31, 2008: TRIMMER. WORN. THE TRIM (PITCH) INDICATOR WHILE IN CRUISE IS AT THE MOST FWD PART OF THE TRIM INDICATOR. REMOVED AND REPLACED THE ELEVATOR TRIM TABA CONTROL WHEEL P/N 5565756- - [SDR DXTA200802790](https://openairdocs.org/sdr/DXTA200802790), Jan 22, 2008: CONTROL COLUMN. VIBRATION. VERY HIGH DEGREE OF VIBRATION IN CONTROL COLUMN AND YOKE AT ALL SPEEDS ABOVE 250 KNOTS AND AT ALL ALTITUDES ABOVE THAT SPEED. PERFORMED ELEVATOR AND ELEVATOR TR - [SDR DXTA200702654](https://openairdocs.org/sdr/DXTA200702654), Dec 6, 2007: WIRE. DAMAGED. AFTER TAKEOFF AND POSITIVE RATE LANDING GEAR WAS SELECTED UP, THE (3) GEAR LIGHTS EXTINGUISHED BUT THE RED UNLOCK LIGHT ILLUMINATED. REMOVED AND REPLACED WIRE E - [SDR DXTA200702600](https://openairdocs.org/sdr/DXTA200702600), Nov 6, 2007: MASTER CYLINDER. BYPASSING. LT BRAKE PEDAL ON CAPTAINS SIDE GOES NEARLY TO THE FLOOR. COPILOTS SIDE NORMAL. GAINED ACCESS AND REMOVED PILOT SIDE LT BRAKE MASTER CYLINDER AND INSTALLED AN O - [SDR DXTA200702596](https://openairdocs.org/sdr/DXTA200702596), Nov 4, 2007: BRAKE ASSY. MALFUNCTIONED. LT BRAKE PEDAL ON CAPTAINS SIDE GOES NEARLY TO THE FLOOR BEFORE ENGAGING. T/S. FOUND BRAKE SYSTEM NEEDED BLED. BLED LT BRAKE SYSTEM MULTIPLE TIMES IAW MM CH 32- - [SDR DXTA200702501](https://openairdocs.org/sdr/DXTA200702501), Sep 26, 2007: BRAKE ASSY. MALFUNCTIONED. ON LANDING, LT BRAKE PEDAL WENT TO THE FLOOR WHEN PRESSURE APPLIED WITH NO LT SIDE BRAKING. AC STOPPED WITH NO INCIDENT AND AFTER PUMPING BRAKES REGAINED MINIMA - [SDR DXTA200702385](https://openairdocs.org/sdr/DXTA200702385), Aug 6, 2007: BRAKE ASSY. MALFUNCTIONED. ON LANDING, CAPTS LT BRAKE PEDAL WENT TO FLOOR WITH NO BRAKING ACTION. REMOVED AND REPLACED PILOTS LT WHEEL BRAKE MASTER CYLINDER. PERFORMED BRAKE BLEED. PERFOR - [SDR DXTA200702360](https://openairdocs.org/sdr/DXTA200702360), Jul 29, 2007: BRAKE. INOPERATIVE. LT MAIN BRAKE SPONGY ON BOTH SIDES OF COCKPIT. BLED LEFT MAIN BRAKE. OPS AND LEAK CHECK GOOD. TAXIED ACFT TO RUN-UP AREA AND BACK. NO DEFECTS NOTED. DONE IN REF - [SDR DXTA200702280](https://openairdocs.org/sdr/DXTA200702280), Jun 19, 2007: UNKNOWN. SMOKE. SMOKE WAS SEEN AND SMELLED IN THE COCKPIT. WITH APU RUNNING. [07-12-07] REMOVED AND REPLACED APU IAW 560XL M/M 49-10-00. APU LEAK CHECKS AND OPERATES NORMAL AT - [SDR DXTA200702133](https://openairdocs.org/sdr/DXTA200702133), Apr 23, 2007: BRAKE. FAULTY. LT BRAKE EXTREMELY SPONGY ON TAXI IN. [4-27-07] BLED BRAKE SYSTEM IAW CESSNA 560 XL M/M CHAPTER 32-42-00. OPS CHK SATISFACTORY. - [SDR DXTA200701978](https://openairdocs.org/sdr/DXTA200701978), Feb 28, 2007: PANEL. DEPARTED. ACCESS PANEL JUST AFT OF LT LANDING LIGHT IN JUST IN FRONT OF WING CAME OFF DURING FLIGHT. INSTALLED ACCESS PANEL UNDER LT WING IAW CE560XL MM CHP 53-30-00 - [SDR DXTA200701969](https://openairdocs.org/sdr/DXTA200701969), Feb 27, 2007: MASTER CYLINDER. BYPASSING. CAPTAINS LT BRAKE IS VERY SPONGY BUT WILL CATCH AFTER ALMOST FULL DEPRESSION. REMOVED AND REPLACED PILOT'S LT AND RT BRAKE MASTER CYLINDERS AND BLED SYSTEM IAW - [SDR DXTA200601635](https://openairdocs.org/sdr/DXTA200601635), Oct 5, 2006: ACTUATOR. MALFUNCTIONED. DURING TAXI AND ON 2 OCCASIONS WITHIN 5 MINUTES RED GEAR UNSAFE ILLUMINATED ACCOMPANIED BY GEAR UNSAFE HORN AND LEFT MAIN GEAR LIGHT EXTINGUISHING FOR APPROXIMA - [SDR DXTA200601610](https://openairdocs.org/sdr/DXTA200601610), Sep 21, 2006: RELAY. STUCK. DURING ROLL OUT BRAKE LOW PRESSURE AND ANTI-SKID INOP LIGHTS ILLUMINATED THEN WENT OUT. POST FLIGHT BRAKE PRESSURE PUMP UNABLE TO MAINTAIN 1400 PSI STATIC, OR 9 - [SDR DXTA200601566](https://openairdocs.org/sdr/DXTA200601566), Aug 20, 2006: ELEVATOR. BINDS. ELEVATOR HAS A BINDING/VIBRATION WHEN MOVING IN FLT TAIL IN EITHER POSITION. FIND ON THE GROUND TRIM IS OK. VISUALLY CHECKED ELEVATOR CONTROL COLUMN PUSH PULL T - [SDR DXTA200601415](https://openairdocs.org/sdr/DXTA200601415), Jun 1, 2006: ACTUATOR. FAILED. NOSE GEAR FAILED TO EXTEND FOR LANDING TWICE. 40 SECS PASSED BEFORE GREEN SAFE LIGHT ILLUMINATED ON SECOND TRY. ACCOMPLISHED GEAR EXTENSION AND RETRACTION CYCLE - [SDR DXTA200601399](https://openairdocs.org/sdr/DXTA200601399), May 18, 2006: ACTUATOR. FAULTY. AFTER TAKEOFF, WHEN LANDING GEAR WAS RETRACTED, RED UNLOCK LIGHT REMAINED ILLUMINATED, HYD PRESS AND STAB MISCOMP LIGHT ILLUMINATED. LANDING GEAR WAS LOWERED NO - [SDR DXTA200601389](https://openairdocs.org/sdr/DXTA200601389), May 12, 2006: UPLOCK SWITCH. MALFUNCTIONED. AFTER TAKEOFF WHEN LANDING GEAR WAS RETRACTED, UNLOCK LIGHT REMAINED ILLUMINATED. HYD PRESS AND STAB MISCOMP, CAUTION LIGHTS ILLUMINATED. LANDING GEAR WAS LOWER - [SDR DXTA200601377](https://openairdocs.org/sdr/DXTA200601377), May 2, 2006: CONTROLLER. INOPERATIVE. REPEAT WRITE UP - WHEN GEAR WAS LOWERED THE LT MAIN GREEN LIGHT AND THE RED GEAR UNSAFE LIGHT FLICKERED FOR ABOUT 10 SECONDS. THEN ALL MAIN GEAR LIGHTS ILLUMINA - [SDR DXTA200601372](https://openairdocs.org/sdr/DXTA200601372), Apr 30, 2006: LANDING GEAR. WARNING LIGHT. WHEN GEAR SELECTED DOWN GREEN LT MAIN AND RED UNLOCK LIGHTS WERE FLICKERING RECYCLED GEAR TWICE PROBLEM REMAINED EXECUTED GEAR WILL NOT EXTEND CHECKLIST PROBLEM - [SDR DXTA200601365](https://openairdocs.org/sdr/DXTA200601365), Apr 27, 2006: LANDING GEAR. WARNING LIGHT. REPEAT WRITE UP, WHEN GEAR EXTENDED LT MAIN NO GREEN AND RED UNLOCK REMAINED ON. CYCLED GEAR ONCE SAME SCENARIO FOLLOWED CHECKLIST AND BLEW GEAR DOWN, GOT FLICK - [SDR DXTA200601364](https://openairdocs.org/sdr/DXTA200601364), Apr 26, 2006: LANDING GEAR. WARNING LIGHT. ON FINAL APPROACH PUT LANDING GEAR DOWN LT MAIN GEAR LIGHT FLICKERED AND RED GEAR UNLOCK LIGHT FLICKERED, CYCLED GEAR DID NOT CURE. WENT AROUND CYCLED GEAR AGAI - [SDR DXTA200500963](https://openairdocs.org/sdr/DXTA200500963), Sep 11, 2005: BRAKE ASSY. UNDERSERVICED. LEFT BRAKE ON CAPTAIN'S SIDE MUSHY. BRAKE NEEDS SERVICING. - [SDR DXTA200500872](https://openairdocs.org/sdr/DXTA200500872), Jul 28, 2005: DIODE. INOPERATIVE. GEAR UNSAFE INDICATION FOR LEFT MAIN WHEEL, LIGHT FLICKERING AND UNLOCK LIGHT ON FLICKERING. RAN 'LANDING GEAR WILL NOT EXTEND' CHECKLIST WITH GEAR MANUAL BLOW - [SDR DXTA200500863](https://openairdocs.org/sdr/DXTA200500863), Jul 25, 2005: DOWNLOCK SWITCH. OUT OF RIG. ON APPROACH LOWERED GEAR LT MAIN LIGHT WAS FLICKERING, UNSAFE LIGHT FLICKERING ALSO. DID GO AROUND RAISED GEAR. LOWERED GEAR 2ND TIME SAME INDICATION. BLEW GEAR - [SDR DXTA200500847](https://openairdocs.org/sdr/DXTA200500847), Jul 20, 2005: INDICATION SYS. MALFUNCTIONED. ON FINAL APPROACH LEFT GEAR GREEN LIGHT AND RED GEAR LIGHT FLICKERING. DID CHECKLIST, ACTIVATED EMERGENCY GEAR SYSTEM GOT 3 GREEN LIGHTS, NO RED. GEAR WAS BLOWN - [SDR DXTA200500591](https://openairdocs.org/sdr/DXTA200500591), Feb 13, 2005: LINE. LEAKING. BRAKES ARE SPONGY, LEFT SIDE IS WORSE THAN THE RIGHT SIDE. LEFT BRAKE ALMOST GOES TO HTE FLOOR FOR ANY REACTION. FOUND AIR IN BRAKE SYSTEM, BLED BRAKE SYSTEM IA - [SDR DXTA200400212](https://openairdocs.org/sdr/DXTA200400212), Jan 5, 2004: BULB. INOPERATIVE. AFTER EXTENDING LANDING GEAR, LT MAIN GEAR GREEN LIGHT DOES NOT ILLUMINATE, BLOW-DOWN OF GEAR. FOUND BOTH LT GEAR INDICATOR BULBS TO BE INOPERATIVE. REMOVED BUL - [SDR DXTA200300076](https://openairdocs.org/sdr/DXTA200300076), Aug 1, 2003: ODOR. DETECTED. UPON DESCENT STRONG EXHAUST SMELL OF JET FUMES, APU WAS NOT RUNNING AT THE TIME, AND ENVIRONMENTAL SOURCES SHOWED 50 DEGREES. INSPECTED BOTH ENGINE INLETS AND T - [SDR DXTA20030076](https://openairdocs.org/sdr/DXTA20030076), Aug 1, 2003: ODOR. DETECTED. UPON DESCENT STRONG EXHAUST ODOR OF JET FUMES, APU WAS NOT RUNNING AT THE TIME, AND ENVIRONMENTAL SOURCES SHOWED 50 DEGREES. - ITEM IS UNDER INVESTIGATION. ## 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.