# N574QS: 2008 Cessna 560XL

- Status: Valid registration
- Airframe: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (registry code 2076702, 13 seats)
- Engine: [Pratt & Whitney Canada PW545B](https://openairdocs.org/engine/pratt-whitney-canada-pw545b) (registry code 52186)
- Data sheets: [TCDS A22CE](https://openairdocs.org/tcds/A22CE) (Textron Aviation Inc.), [TCDS E00059EN](https://openairdocs.org/tcds/E00059EN) (Pratt & Whitney Canada Corp.) (OpenAirDocs)
- Serial number: 560-5820
- Year built: 2008
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: December 13, 2008
- Certificate issued: October 2, 2023
- Expires: October 31, 2030
- Mode S code: A75EB4
- Registered owner: [Netjets Sales Inc](https://openairdocs.org/faa-owner/NETJETS%20SALES%20INC)
- Location: [Oklahoma City, OK](https://openairdocs.org/faa-place/OK/Oklahoma%20City)
- Owner type: Corporation
- Owner's area on the map: 35.5467° N, 97.5646° W: Placed by OpenAirDocs at the center of ZIP code 73116, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=574QS
- Page: https://openairdocs.org/aircraft/N574QS

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): 19 in force

### Matched by airframe (Cessna 560XL)

- [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 2025-11-09](https://openairdocs.org/ad/2025-11-09): Fire Protection · Textron 560 and 560XL. Effective Jul 11, 2025
- [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 2020-26-05](https://openairdocs.org/ad/2020-26-05): POWER LEVER · Textron 560XL. Effective Dec 17, 2020
- [AD 2017-04-14](https://openairdocs.org/ad/2017-04-14): Electrical power · Textron 560XL. Effective Mar 9, 2017
- [AD 2012-26-15 R1](https://openairdocs.org/ad/2012-26-15-R1): Navigation · Agusta AW139, A318-111, A318-112 and 70 more. Effective Dec 3, 2014
- [AD 2014-18-01](https://openairdocs.org/ad/2014-18-01): Navigation · Bombardier ATR42-200, ATR42-300, ATR42-320 and 23 more. Effective Oct 14, 2014
- [AD 2013-09-11](https://openairdocs.org/ad/2013-09-11): Air Conditioning · Cessna 500, 501, 550 and 5 more. Effective Jul 5, 2013
- [AD 2012-09-01](https://openairdocs.org/ad/2012-09-01): Landing Gear · Cessna 560XL. Effective Jun 7, 2012
- [AD 2012-06-01](https://openairdocs.org/ad/2012-06-01): Fuselage · Cessna 560XL. Effective Apr 25, 2012
- [AD 2010-07-02](https://openairdocs.org/ad/2010-07-02): Integrated navigation units (INUs) · 328 Support Services 328-100, 328-300, Jetstream Model 4101 and 26 more. Effective May 3, 2010
- [AD 2007-11-17](https://openairdocs.org/ad/2007-11-17): Wires for the positive and negative terminal studs of the engine and/or auxiliary power unit (APU) fire extinguishing bottles. · Cessna 500, 501, 550 and 5 more. Effective Jul 6, 2007
- [AD 2001-23-17](https://openairdocs.org/ad/2001-23-17): GNS 430 units · Cessna 172, 182, 206 and 209 more. Effective Dec 28, 2001
- [AD 2001-14-09](https://openairdocs.org/ad/2001-14-09): Wiring of the Landing Light Switch and theJ-Box Fairing Light Relays · Cessna 560XL. Effective Jul 26, 2001
- [AD 2000-15-51](https://openairdocs.org/ad/2000-15-51): Aileron Cable Fairlead Tube and Aileron Cable Sector · Cessna 560XL. Effective Aug 14, 2000
- [AD 2000-03-09](https://openairdocs.org/ad/2000-03-09): Residual Ice · Cessna 560 and 560XL. Effective Apr 3, 2000
- [AD 98-25-02](https://openairdocs.org/ad/98-25-02): Top-mounted Antenna · Bell Helicopter Textron Canada 407, 172, 172A and 243 more. Effective Dec 22, 1998
- [AD 94-01-04](https://openairdocs.org/ad/94-01-04): Traffic Alert and Collision Avoidance System · Airbus A300 B4-601, A300 B4-603, A300 B4-605R and 136 more. Effective Feb 4, 1994

### Matched by engine (Pratt & Whitney Canada PW545B)

- [AD 2010-18-09](https://openairdocs.org/ad/2010-18-09): Bleed valve/servo valve · Pratt & Whitney Canada PW545A, PW545B and PW530A. Effective Sep 10, 2010

### Historical (superseded or no longer in force)

- [AD 2012-26-15](https://openairdocs.org/ad/2012-26-15) (historical): Navigation · Agusta AW139, A318-111, A318-112 and 71 more. Effective Jan 24, 2013
- [AD 2006-22-05](https://openairdocs.org/ad/2006-22-05) (historical): Integrated navigation units (INUs) · 328 Support Services 328-100, 328-300, Jetstream Model 4101 and 27 more. Effective Dec 1, 2006
- [AD 2006-04-10](https://openairdocs.org/ad/2006-04-10) (historical): Identification sleeves · Cessna Aircraft Company, The 500, 550, 560 and 3 more. Effective Mar 24, 2006

## Information bulletins (advisory) (4 in force)

- [SAIB AIR-21-15R1](https://openairdocs.org/saib/AIR-21-15R1): Navigation System. Issued Sep 16, 2021
- [SAIB CE-10-29R1](https://openairdocs.org/saib/CE-10-29R1): Lights  Aft Side Ledger Divider Light. Issued May 21, 2010
- [SAIB NM-10-13](https://openairdocs.org/saib/NM-10-13): Navigation: Flight Management System. Issued Jan 7, 2010
- [SAIB 2024-06](https://openairdocs.org/saib/2024-06): Oil Servicing Issues on Pratt & Whitney Canada PW545 Series Engines. Issued Nov 18, 2024
- [SAIB AIR-21-15](https://openairdocs.org/saib/AIR-21-15) (historical): Navigation System. Issued Aug 26, 2021
- [SAIB CE-10-29](https://openairdocs.org/saib/CE-10-29) (historical): Lights  Aft Side Ledger Divider Light. Issued Apr 28, 2010

## NTSB investigations

None matched to N574QS.

## FAA accident and incident reports

None matched to N574QS.

## Service difficulty reports (21)

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 DXTA2026071308756](https://openairdocs.org/sdr/DXTA2026071308756), Jul 9, 2026: NUT. MISSING. THE HANDLE FOR LIFTING AND LOWERING THE MAIN CABIN DOOR IS MISSING HARDWARE. THE STRUT THAT CONNECTS THE HANDLE TO THE DOOR IS MISSING A NUT AND THE SCREW HAS B
- [SDR DXTA2025112505827](https://openairdocs.org/sdr/DXTA2025112505827), Nov 24, 2025: DOOR. LACK OF LUBE. THE MAIN DOOR HANDLE IS DIFFICULT TO CLOSE DUE TO EXCESSIVE RESISTANCE. OPENING IS EASIER BUT STILL DIFFICULT CORRECTIVE ACTION: OPENED AND CLOSED MED AND DUPLI
- [SDR DXTA2025030502564](https://openairdocs.org/sdr/DXTA2025030502564), Mar 2, 2025: G SWITCH. TRIPPED. EMERGENCY LIGHTING: WITH EMERGENCY LIGHT SWITCH IN ARM POSITION AFT CABIN EMERGENCY LIGHTS AND OVERWING EXTERIOR EMERGENCY LIGHTS REMAIN ILLUMINATED. IN OFF ALL
- [SDR DXTA2024090900445](https://openairdocs.org/sdr/DXTA2024090900445), Sep 5, 2024: SOLENOID VALVE. DEFECTIVE. RUDDER: REPEAT WRITE UP. AFTER APPLYING TAKEOFF POWER AND BEGINNING TAKEOFF ROLL AIRCRAFT PULLS SEVERELY TO THE RIGHT AND WITH FULL LEFT RUDDER UNABLE TO MAINTA
- [SDR DXTA2023080892490](https://openairdocs.org/sdr/DXTA2023080892490), Aug 7, 2023: UNKNOWN. UNKNOWN. DOOR LOCKED INDICATOR MOVES OPPOSITE TO HANDLE. SHOWS LOCKED WHEN OPEN. MAIN DOOR HARDWARE: PIN COMING OUT ON LIFT ROD END. ITS MOVABLE BY FINGERS. REMOVED CABI
- [SDR EBVR202323210001](https://openairdocs.org/sdr/EBVR202323210001), Feb 20, 2023: UNKNOWN. EXPOSED. CHAFING TO EMERGENCY EXIT FWD STRUCTURAL SURROUND FROM SCREW HEADS IN EMERGENCY EXIT SURROUND PANEL.
- [SDR DXTA2022111473960](https://openairdocs.org/sdr/DXTA2022111473960), Nov 14, 2022: INDICATOR. OUT OF POSITION. MAIN DOOR VISUAL INDICATOR: WITH THE CABIN DOOR UNLOCKED, THE DOOR LOCKED INDICATOR ON THE STEP IS MOSTLY VISIBLE. WITH THE DOOR LOCKED, THE DOOR LOCKED INDICAT
- [SDR DXTA2022111473920](https://openairdocs.org/sdr/DXTA2022111473920), Nov 13, 2022: TORQUE TUBE. LACK OF LUBE. MAIN DOOR: WHEN OPENING THE MAIN CABIN DOOR FROM THE OUTSIDE, THE DOOR PINS RETRACT NORMALLY. WHEN ATTEMPTING TO PUT THE DOOR HANDLE BACK INTO THE CENTERED POSI
- [SDR DXTA2022051161590](https://openairdocs.org/sdr/DXTA2022051161590), May 10, 2022: NONE. NONE. MAIN DOOR HANDLE: MAIN CABIN DOOR HANDLE IS EXTREMELY STIFF AND DIFFICULT TO OPEN AND CLOSE BOTH INSIDE AND AND OUTSIDE OF THE AIRCRAFT///CORRECTIVE ACTION///LU
- [SDR DXTA2022022857520](https://openairdocs.org/sdr/DXTA2022022857520), Feb 28, 2022: NONE. NONE. AFTER STARTING THE APU, WE WAITED APPROXIMATELY 3 MIN BEFORE THE BLEED AIR WAS TURNED ON. WITHIN 15 SECONDS OF TURNING THE APU BLEED AIR ON, THE CABIN STARTED T
- [SDR DXTA2021090148010](https://openairdocs.org/sdr/DXTA2021090148010), Aug 31, 2021: COUNTERBALANCE. OUT OF ADJUST. MAIN DOOR: WHEN OPENING AND CLOSING, DOOR STOPS MIDWAY AND TAKES CONSIDERABLE PRESSURE TO FINISH CLOSING OR OPENING. LUBED AND ADJUSTED COUNTERBALANCE MAIN ENTR
- [SDR DXTA2021070144510](https://openairdocs.org/sdr/DXTA2021070144510), Jun 30, 2021: LOCK. MALFUNCTIONED. MAIN DOOR LOCK: DOOR PINS RETRACT INTO DOOR WHEN HANDLE MOVED TO OPEN POSITION AND EXTEND WHEN HANDLE MOVED TO NEUTRAL POSITION.///SIGN-OFF///CLEANED DEBRIS FRO
- [SDR DXTA2021021204719](https://openairdocs.org/sdr/DXTA2021021204719), Feb 11, 2021: SWITCH. DEFECTIVE. CABIN DOOR ANNUNCIATOR CAME ON INFLIGHT AND STAYED ON CLIMBING THROUGH FL360. NO OTHER INDICATIONS PRESENT. TROUBLESHOT CABIN DOOR ANNUNCIATOR COMING ON IN FLIG
- [SDR DXTA2021021004705](https://openairdocs.org/sdr/DXTA2021021004705), Feb 9, 2021: PCB. DEFECTIVE. UPON REACHING FL390 THE CABIN DOOR ANNUNCIATOR ILLUMINATED. ALL GREEN FLAGS WERE VISIBLE AND NO OTHER WARNING LIGHTS (SIX PACK) WERE ILLUMINATED.///SIGN-OFF///R
- [SDR DXTA2012101605149](https://openairdocs.org/sdr/DXTA2012101605149), Oct 15, 2012: APU. ODOR. WITH APU RUNNING AND BLEED AIR ON, CABIN AND COCKPIT BEGAN FILLING WITH SMOKE. COMPLIED WITH BOROSCOPE INSPECTION OF THE APU INLET AND FOUND THE INSIDE FAN SEAL
- [SDR CWQR20120705043](https://openairdocs.org/sdr/CWQR20120705043), Jul 5, 2012: HINGE BRACKET. CRACKED. DURING SCHEDULED MX, FOUND RT ELEVATOR OTBD HINGE BRACKET CRACKED. CRACK WAS FOUND USING EDDY CURRENT NDT METHOD, CRACK FROM THE EDGE OF THE PART INBD TO THE FI
- [SDR CWQR20120627042](https://openairdocs.org/sdr/CWQR20120627042), Jun 27, 2012: STIFFENER. CRACKED. DURING A SCHEDULED INSPECTION, FOUND WEB ASSY CRACKED WHERE THE CABIN DOOR HANDLE ASSY ATTACHES TO IT WITH NUT PLATES. AFTER REVIEW OF IPC, DISCOVERED STIFFENER
- [SDR DXTA2011112804798](https://openairdocs.org/sdr/DXTA2011112804798), Nov 25, 2011: UPLOCK SWITCH. INOPERATIVE. ON GEAR RETRACTION, NOSE GEAR LIGHT AND GEAR UNSAFE LIGHT REMAINED ILLUMINATED. EXTENDED GEAR AND LEFT IT DOWN FOR REMAINDER OF FLIGHT. AFTER FLAP EXTENSION TO 
- [SDR DXTA2011012404431](https://openairdocs.org/sdr/DXTA2011012404431), Jan 23, 2011: STRUT. LOW PRESSURE. AFTER TAKEOFF, MLG HANDLE RAISED. MAINS RETRACTED NORMALLY & RESPECTIVE GREEN LIGHTS OUT. RED UNLOCK LIGHT REMAINED ON FOR 15 SECONDS NLG HEARD NOT FULLY RETRAC
- [SDR DXTA2009021603507](https://openairdocs.org/sdr/DXTA2009021603507), Feb 15, 2009: ROD END. OUT OF ADJUST. GEAR UNLOCK LIGHT REMAINED ON AFTER GEAR RETRACTION. RT DOOR WOULD BND UP WITH LT DOOR. ADJUSTED FWD NOSE GEAR DOOR ROD ENDS AS REQUIRED. (IAW MM 32-20-00) SWUN
- [SDR DXTA2009020903495](https://openairdocs.org/sdr/DXTA2009020903495), Feb 6, 2009: ACTUATOR. FAILED. ON CLIMB OUT THE RED GEAR UNLOCK LIGHT CAME ON. WHEN WE PULLED THE HYD PRESS CB THE NOSE GEAR WENT DOWN AND LOCKED EVEN THOUGH THE HANDLE WAS UP. M2B - R&R NOSE

## STCs that may be installed (OpenAirDocs) (114, first 50)

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 (Cessna 560XL)

- [STC ST01305WI-D](https://openairdocs.org/stc/ST01305WI-D): Modification of a Collins ALT-50A or ALT-55B Radio Altimeter system installation to a Collins ALT-1000 or ALT-4000 Radio Altimeter system installation in accordance with Collins Drawing Index as listed on AML No. ST01305WI-D, Revision -, or later FAA approved revision. Rockwell Collins Inc
- [STC ST12461IB](https://openairdocs.org/stc/ST12461IB): Installation of Cockpit Voice Recorder with optional RIPS Upgrade. Mid- Canada Mod Center
- [STC ST01823WI](https://openairdocs.org/stc/ST01823WI): Installation of Garmin GTS Traffic Sensor with Garmin GTX 3000 Mode S Transponders with ADS-B Out. Blackhawk Aerospace Technologies Inc
- [STC ST00197IB](https://openairdocs.org/stc/ST00197IB): Installation of the Universal Quick Access Recorder (uQAR). Flight Data Technologies Inc
- [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 SA2622NM](https://openairdocs.org/stc/SA2622NM): Installation of Precise Flight Pulselite Control Unit in landing/taxi system. (767-200 B17) (DHC-8 101). Precise Flight Inc
- [STC ST02016WI](https://openairdocs.org/stc/ST02016WI): Installation of the Meggitt Wireless Tire Pressure Sensor. 3S Certification LLC
- [STC ST00892LA](https://openairdocs.org/stc/ST00892LA): Installation of Emergency Vision Assurance System (EVAS). VisionSafe LLC
- [STC ST00390BO](https://openairdocs.org/stc/ST00390BO): Installation of a SmartSky Networks Air to Ground Data Link System. Apcela IFC JV, LLC dba Apcela ATG
- [STC ST04604CH](https://openairdocs.org/stc/ST04604CH): INSTALL SMARTSKY FLAGSHIP SYSTEM. Apcela IFC JV, LLC dba Apcela ATG
- [STC ST03885AT](https://openairdocs.org/stc/ST03885AT): Installation of an Avionica, Inc. avCM Cellular Module. Aircraft Systems and Manufacturing Inc
- [STC ST02718LA](https://openairdocs.org/stc/ST02718LA): Modification to replace the existing standby instrument. Acron Aviation Inc
- [STC ST03292CH](https://openairdocs.org/stc/ST03292CH): Activation of an 802.11 a/b/g/n WiFi System. Elliott Aviation Technical Products Development, Inc
- [STC ST12042WI](https://openairdocs.org/stc/ST12042WI): Upgrade of AirCell High Speed Internet System to Gogo Business Aviation C1 System. Duncan Aviation Inc
- [STC ST09854AC](https://openairdocs.org/stc/ST09854AC): Installation of a Lumin Media Server. L2 Aviation
- [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 ST04730NY](https://openairdocs.org/stc/ST04730NY): Installation of Battery Temperature Indicator. Aero-Mach Labs Inc
- [STC ST01117DE](https://openairdocs.org/stc/ST01117DE): Installation of the Gogo ATG C1. Peregrine
- [STC ST02804SE](https://openairdocs.org/stc/ST02804SE): Installation of Starlink Aviation System. AeroMech Incorporated
- [STC ST01979WI](https://openairdocs.org/stc/ST01979WI): Installation of Gogo Business Aviation AVANCE L5/X3 System or optional AVANCE LX5 System. Gogo Business Aviation LLC
- [STC ST04742NY](https://openairdocs.org/stc/ST04742NY): Installation of SkyVue 1000 Cockpit Upgrade including dual Avidyne IFD540 FMS with LPV i. Aerospace Design & Compliance LLC
- [STC ST01833WI](https://openairdocs.org/stc/ST01833WI): Modification of a Rockwell Collins Global Positioning System (GPS) installation. Rockwell Collins Inc
- [STC ST01918WI](https://openairdocs.org/stc/ST01918WI): Installation of Garmin G5000 Integrated Flight Deck. Garmin International Inc
- [STC ST01936WI](https://openairdocs.org/stc/ST01936WI): Installation of LED lights. AeroLED's Holdings LLC
- [STC ST01083DE](https://openairdocs.org/stc/ST01083DE): Installation of the Aviation Clean Air Airborne Air & Surface Purification System. Lee Aerospace, Inc
- [STC ST04159CH](https://openairdocs.org/stc/ST04159CH): Upgrade of Honeywell Primus II Communications Units RCZ-8XX Transponders to support Certification of Automatic Dependent Surveillance -Broadcast (ADS-B) Out. CMD Flight Solutions LLC
- [STC ST02427LA](https://openairdocs.org/stc/ST02427LA): Installation of Dual Garmin GTN 6XX/7XX Series Global Navigation System with Structural Antenna and WAAS approval; Garmin GMA 35 Audio Panel; and Dual Garmin GTX 33 Mode S Transponders, Weather Radar, and ADS-B Link. JETTECH LLC
- [STC ST03424CH](https://openairdocs.org/stc/ST03424CH): Certification of Automatic Dependent Surveillance - Broadcast (ADS-B) Out System with Rockwell Collins TDR-94/-94D Transponders. CMD Flight Solutions LLC
- [STC ST04575AT](https://openairdocs.org/stc/ST04575AT): Installation of the Rockwell Collins ALT-1000+/ -4000+ with 5G Filtering. Chippewa Aerospace Inc
- [STC ST02029WI](https://openairdocs.org/stc/ST02029WI): Installation of Garmin GI 275 Standby Instrument and GSB 15 USB Port. Blackhawk Aerospace Technologies
- [STC ST00098IB](https://openairdocs.org/stc/ST00098IB): Introduction of ADS-B Out. STC Twenty One Limited
- [STC ST01985WI](https://openairdocs.org/stc/ST01985WI): Installation of the Garmin GI-275 I Electronic Standby Instrument (ESI). Peregrine
- [STC ST00011WI](https://openairdocs.org/stc/ST00011WI): Installation of Concorde RG380E/40 and 40B battery. Aero-Mach Wilco LLC
- [STC ST11285DS](https://openairdocs.org/stc/ST11285DS): An update to the existing Collins Aerospace Integrated Flight Information System (IFIS) FSU-5010 and upgrade the existing XMWR-1000 to a XMWR-1000S (Sirius XM) in Part 25. BHE & Associates Ltd
- [STC ST03035NY](https://openairdocs.org/stc/ST03035NY): Replacement of certain Goodrich pneumatic deicer boots. SMR Technologies Inc
- [STC ST04258CH](https://openairdocs.org/stc/ST04258CH): Installation of Gogo Business Aviation Avance High Speed Data System. Ross Aviation Flight Maintenance
- [STC ST00411BO](https://openairdocs.org/stc/ST00411BO): Installation of Avidyne GPS/Nav/Com. Avidyne Corporation
- [STC ST01916WI](https://openairdocs.org/stc/ST01916WI): Installation of Beijing Sky Aviation Chinese Flight Inspection System. Duncan Aviation Inc
- [STC ST02635LA](https://openairdocs.org/stc/ST02635LA): Modification to replace the existing Mode S Transponder system with the ACSS NXT-600 Mode S Transponder with ADS-B Out. Aviation Communication and Surveillance Systems (ACSS) LLC
- [STC SA01452CH](https://openairdocs.org/stc/SA01452CH): Installation of an air ambulance conversion kit. Med-Pac Inc
- [STC ST00953DE](https://openairdocs.org/stc/ST00953DE): Installation of a cabin emergency lighting. West Star Aviation
- [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 ST01859WI](https://openairdocs.org/stc/ST01859WI): Installation of Gogo Business Aviation's Gogo Biz 4G Air-to-Ground System. Textron Aviation Inc Wichita Citation Service Center
- [STC ST00158BO](https://openairdocs.org/stc/ST00158BO): Installation of Universal Avionics Systems Corporation (UASC) Flight Management System (FMS). Pro Star Aviation, LLC
- [STC ST04416CH](https://openairdocs.org/stc/ST04416CH): Install Mid-Continent Instruments MD-302 Standby Instrument. Elliott Aviation Technical Products Development Inc
- [STC ST00934DE](https://openairdocs.org/stc/ST00934DE): Installation of Becker Avionics BXT6553 transponder. Peregrine
- [STC ST01780LA](https://openairdocs.org/stc/ST01780LA): Installation of a Patient Loading and Utility System. LifePort LLC
- [STC ST04340NY](https://openairdocs.org/stc/ST04340NY): Installation of TCAS 7.1 (ACAS II) upgrade of Prior Existing TCAS 7.0. Scandinavian Avionics Design ApS
- [STC ST01138CH](https://openairdocs.org/stc/ST01138CH): Install air ambulance conversion. Spectrum Aeromed LLC dba Spectrum Aeromed
- [STC ST00883DE](https://openairdocs.org/stc/ST00883DE): Installation of Grumman LitefLCR-100 Attitude Heading and Reference System (AHRS) in place of existing LCR-93 AHRS. Peregrine

All 114: https://openairdocs.org/aircraft/N574QS/stcs.md

## Related

- Other Cessna 560XL aircraft: https://openairdocs.org/model/cessna-560xl/aircraft.md
- The Pratt & Whitney Canada PW545B engine: https://openairdocs.org/engine/pratt-whitney-canada-pw545b.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.