# N520WS: 1988 Beech 400 - Status: Valid registration - Airframe: [Beech 400](https://openairdocs.org/model/beech-400) (registry code 1155400, 9 seats) - Engine: [Pratt & Whitney Canada JT15D 5 series](https://openairdocs.org/engine/pratt-whitney-canada-jt15d-5-series) (registry code 52113) - Data sheets: [TCDS A16SW](https://openairdocs.org/tcds/A16SW) (Textron Aviation Inc.) (OpenAirDocs) - Serial number: RJ-53 - Year built: 1988 - Type: Fixed wing multi engine - Engine type: Turbo-fan - Airworthiness: Standard, transport - Airworthiness date: December 13, 1988 - Certificate issued: January 27, 2021 - Expires: January 31, 2028 - Mode S code: A68AF3 - Registered owner: [Mmu Aviation LLC](https://openairdocs.org/faa-owner/MMU%20AVIATION%20LLC) - Location: [West Orange, NJ](https://openairdocs.org/faa-place/NJ/West%20Orange) - Owner type: LLC - Owner's area on the map: 40.7858° N, 74.2651° W: Placed by OpenAirDocs at the center of ZIP code 07052, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=520WS - Page: https://openairdocs.org/aircraft/N520WS From the FAA registry file of October 22, 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. The registry lists only the engine series, so ADs for every Pratt & Whitney Canada JT15D 5 model are included. ## ADs that may apply (OpenAirDocs): 29 in force ### Matched by airframe (Beech 400) - [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 2022-03-15](https://openairdocs.org/ad/2022-03-15): Fuel Quantity Indicator · Garmin G3X Touch Electronic Flight Instrument System (STC SA01899WI or SA02658SE). Effective Mar 21, 2022 - [AD 2014-21-06](https://openairdocs.org/ad/2014-21-06): Flight Controls · Textron 400, 400A, 400T and 1 more. Effective Nov 28, 2014 - [AD 2014-15-15](https://openairdocs.org/ad/2014-15-15): Stabilizers · Textron 400, 400A, 400T and 1 more. Effective Sep 5, 2014 - [AD 2011-01-09](https://openairdocs.org/ad/2011-01-09): Oxygen · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 290 more. Effective Feb 9, 2011 - [AD 2009-07-02](https://openairdocs.org/ad/2009-07-02): Flightcrew seats · Textron 400, 400A, MU-300 and 1 more. Effective Apr 30, 2009 - [AD 2006-16-18 R1](https://openairdocs.org/ad/2006-16-18-R1): Installing a warning placard on the TAWS/RMI · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 100 more. Effective Jul 18, 2008 - [AD 2007-19-05](https://openairdocs.org/ad/2007-19-05): Engine cowling panels · Textron 400, 400A and 400T. Effective Oct 23, 2007 - [AD 2006-21-02](https://openairdocs.org/ad/2006-21-02): Operating Limitations, Abnormal Procedures, and Normal Procedures · Textron 400, 400A, 400T and 1 more. Effective Oct 25, 2006 - [AD 2006-15-16](https://openairdocs.org/ad/2006-15-16): Generator control unit (GCU) installation kits · Textron 400 and 400A. Effective Sep 5, 2006 - [AD 2005-01-19](https://openairdocs.org/ad/2005-01-19): Mode S transponders · GARMIN International GTX 330D, GTX 330, GTX 33D and 830 more. Effective Feb 23, 2005 - [AD 2004-22-02](https://openairdocs.org/ad/2004-22-02): Spoiler mixer bay · Textron 400, 400A, 400T and 2 more. Effective Dec 1, 2004 - [AD 2002-01-23](https://openairdocs.org/ad/2002-01-23): Left Engine Forward Carry-Through Mount Bracket · Textron 400, 400A, 400T and 2 more. Effective Feb 14, 2002 - [AD 2001-24-11](https://openairdocs.org/ad/2001-24-11): AFM - Emergency Procedures Section - Loss of Airspeed · Textron 400, 400A, 400T and 2 more. Effective Dec 11, 2001 - [AD 2001-03-06](https://openairdocs.org/ad/2001-03-06): Bleed Air Supply Tube Assembly · Textron 400, 400A, MU-300 and 1 more. Effective Mar 22, 2001 - [AD 2000-25-04](https://openairdocs.org/ad/2000-25-04): Anti-Skid Valve Assembly · Textron 400, 400A, 400T and 2 more. Effective Jan 17, 2001 - [AD 99-21-26](https://openairdocs.org/ad/99-21-26): Airplane Flight Manual Changes - Icing Conditions · Textron 400, 400A, 400T and 1 more. Effective Nov 22, 1999 - [AD 98-08-20](https://openairdocs.org/ad/98-08-20): Autopilot Servo Actuators · Alliedsignal Avionics Autopilot Servo Actuators, Mystere-Falcon 20 - C5, Mystere-Falcon 20 - D5 and 17 more. Effective Jun 2, 1998 - [AD 98-06-30](https://openairdocs.org/ad/98-06-30): Outflow/Safety Valves · Textron 400, 400A, 400T and 2 more. Effective Apr 24, 1998 - [AD 95-25-06](https://openairdocs.org/ad/95-25-06): Modify Standby Instrument Lighting System · Textron 400, 400A and 400T. Effective Jan 16, 1996 - [AD 95-18-04](https://openairdocs.org/ad/95-18-04): Autopilot & Rudder Boost Improvement Kit · Textron 400 and 400A. Effective Oct 10, 1995 - [AD 94-19-06](https://openairdocs.org/ad/94-19-06): Crew Oxygen Masks · 328 Support Services 328-100, 328-300, 500 and 17 more. Effective Oct 6, 1994 - [AD 93-01-08](https://openairdocs.org/ad/93-01-08): Airplane Flight Manual (AFM) Revision · Textron 400, 400A, 400T and 1 more. Effective Mar 4, 1993 - [AD 92-15-02](https://openairdocs.org/ad/92-15-02): Engine Mounting System · Textron 400, MU-300 and MU-300-10. Effective Aug 18, 1992 - [AD 90-17-05](https://openairdocs.org/ad/90-17-05): Airplane Flight Manual (AFM) Changes - Fuel · Textron 400, MU-300 and MU-300-10 with STC SA1596NM or 2 others. Effective Sep 17, 1990 ### Matched by engine (Pratt & Whitney Canada JT15D 5 series) - [AD 2008-24-10](https://openairdocs.org/ad/2008-24-10): Fuel Control Hydro Mechanical Unit (HMU) P3 servo · Pratt & Whitney Canada JT15D-5, JT15D-5B, JT15D-5F and 1 more. Effective Jan 2, 2009 - [AD 93-19-03](https://openairdocs.org/ad/93-19-03): Flow Divider Start Salve Diaphragm · Pratt & Whitney Canada JT15D-5A. Effective Oct 12, 1993 - [AD 91-01-03](https://openairdocs.org/ad/91-01-03): Hydromechanical Fuel Control Units · Pratt & Whitney Canada JT15D-5, PW118, PW118A and 3 more. Effective Jan 7, 1991 ### Historical (superseded or no longer in force) - [AD 96-17-10](https://openairdocs.org/ad/96-17-10) (historical): Outflow/Safety Valve · Raytheon 200 Model or Series (all), 2000, 300 and 5 more. Effective Sep 24, 1996 - [AD 92-22-15](https://openairdocs.org/ad/92-22-15) (historical): Pratt & Whitney Canada JT15D-5A. Effective Oct 21, 1992 ## Information bulletins (advisory) (3 in force) - [SAIB SW-18-31](https://openairdocs.org/saib/SW-18-31): NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM. Issued Nov 21, 2018 - [SAIB CE-18-24](https://openairdocs.org/saib/CE-18-24): Flap Cable Inspection. Issued Aug 27, 2018 - [SAIB NE-07-03](https://openairdocs.org/saib/NE-07-03): Dual-engine flameouts. Issued Oct 12, 2006 ## NTSB investigations None matched to N520WS. ## FAA accident and incident reports (1) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Incident 20091121053249I](https://openairdocs.org/incident/20091121053249I), Nov 21, 2009: Beech 400 (N520WS), Denver, CO, Minor damage. Pilot departed runway 8 at ftg. Upon gear retraction, he experienced difficulty maintaining wings level flight. He elected to make an emergency landing on… ## Service difficulty reports None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. ## STCs that may be installed (OpenAirDocs) (117, 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 (Beech 400) - [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 ST04187NY](https://openairdocs.org/stc/ST04187NY): Installation of of Enode Engine Data Acquisition Unit & Ionode Digital Data Recorder. TBO Extension, LLC - [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 ST11216DS](https://openairdocs.org/stc/ST11216DS): Installation of automatic dependent surveillance-broadcast (ADS-B) out on Part 25 aircraft. BHE & Associates Ltd - [STC ST01881CH-D](https://openairdocs.org/stc/ST01881CH-D): Installation of a Goodrich Avionics Systems LANDMARK Terrain Awarenes and Warning System TAWS8000 (TAWS B) installation. Acron Aviation Inc - [STC ST180CH](https://openairdocs.org/stc/ST180CH): Installation of TCAS I. Acron Aviation Inc - [STC ST04740NY](https://openairdocs.org/stc/ST04740NY): Installation of LAI Windshields. Lee Aerospace Inc - [STC ST01833WI](https://openairdocs.org/stc/ST01833WI): Modification of a Rockwell Collins Global Positioning System (GPS) installation. Rockwell Collins Inc - [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 ST04723NY](https://openairdocs.org/stc/ST04723NY): Installation of LAI Windshields. Lee Aerospace Inc - [STC ST01070DE](https://openairdocs.org/stc/ST01070DE): Installation of the Curtiss-Wright Fortress Flight Data Recorder (with Cockpit Voice Recorder). Peregrine - [STC ST04552CH](https://openairdocs.org/stc/ST04552CH): Installation of replacement parts consisting of horizontal stabilizer ribs, pivot fitting, and spar attach angle in accordance with Nextant Aerospace Master Data List Document No. NT0027-MDL0-0000, Revision C, dated April 7, 2022, and FAA approved August 30, 2022, or later FAA approved revision. Instructions for Continued Airworthiness (ICA), Document No. NT0027-ICA0-0100, Revision B, dated July 21, 2022, FAA approved September 6, 2022, or later approved revision is required for this installation. Nextant Aerospace LLC - [STC ST01930LA](https://openairdocs.org/stc/ST01930LA): Installation of Sandel Avionics SN4500 Electronic Horizontal Situation Indicator (EHSI). Sandel Avionics LLC - [STC SA2065CE-D](https://openairdocs.org/stc/SA2065CE-D): Installation of Bendix/King EFS-10 Electronic Flight Instrument Systems (3 tube), single or dual KFC 400 Automatic Flight Control System (Category I and II), single or dual KAD 480 Air Data System, KNS 660 Flight Management System, KHF 950 HF Comm System, RDS 86 Color Weather Radar and Series III Radios. Honeywell International 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 ST01935WI](https://openairdocs.org/stc/ST01935WI): Installation of windshield. Lee Aerospace - [STC ST04180NY](https://openairdocs.org/stc/ST04180NY): Installation of LAI CoolView Side Cockpit Windows. Lee Aerospace Inc - [STC SA5933SW](https://openairdocs.org/stc/SA5933SW): Installation of a freon air conditioning system for use up to 18,000 feet. Air Comm Corporation - [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 ST00835DE](https://openairdocs.org/stc/ST00835DE): Installation of Automatic Dependent Surveillance - Broadcast (ADS-B) Out and In functionality using the Garmin GTX 335R and GTX 345R Transponders plus qualified position sensor. Peregrine - [STC ST03255CH](https://openairdocs.org/stc/ST03255CH): Install air ambulance conversion. Spectrum Aeromed LLC dba Spectrum Aeromed - [STC ST00347BO](https://openairdocs.org/stc/ST00347BO): Modification to upgrade a BendixKing CAS 67A TCAS II system to CAS 67B TCAS II Change 7.1. Pro Star Aviation, LLC - [STC ST04279CH](https://openairdocs.org/stc/ST04279CH): Installation of Exterior LED lights. Nextant Aerospace - [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 ST00276WI](https://openairdocs.org/stc/ST00276WI): Installation of Kedeg Company 21BC11e Coaleser Assemly. Purolator Facet, Inc - [STC SA2333SO](https://openairdocs.org/stc/SA2333SO): Installation of air conditioning system. Textron Aviation Inc - [STC SA2744NM](https://openairdocs.org/stc/SA2744NM): Installation of extended range fuselage auxiliary fuel tank. Sierra Industries Ltd - [STC SA2745NM](https://openairdocs.org/stc/SA2745NM): Installation of aft fuselage fuel tank fill system. Sierra Industries Ltd - [STC ST00959AT](https://openairdocs.org/stc/ST00959AT): Consolidate STC's SA3320SO,ST00141AT, ST00244AT, ST00245AT, AND ST00667AT. (400 S/N RJ-61 ONLY). Textron Aviation Inc - [STC SA2501SO](https://openairdocs.org/stc/SA2501SO): Installation of Whelen Flashing Anticollision Light P/N 90033. Textron Aviation Inc - [STC ST02619AT](https://openairdocs.org/stc/ST02619AT): Installation of a Battery Low Voltage Warning/Shutoff System per Master Drawing List MDL RAF01106A dtd 6/10/02 or later FAA approved revision. Textron Aviation Inc - [STC ST00344AT](https://openairdocs.org/stc/ST00344AT): Installation of emergency lighting system improvement modification. Textron Aviation Inc - [STC ST00425AT](https://openairdocs.org/stc/ST00425AT): Installation of a Pulse Lighting System. Textron Aviation Inc - [STC ST00793AT](https://openairdocs.org/stc/ST00793AT): Installation of External Power Overvoltage. Protection System. Textron Aviation Inc - [STC ST00966AT](https://openairdocs.org/stc/ST00966AT): Installation of pilot and co- pilot seat crotch belt. Textron Aviation Inc - [STC ST01478AT](https://openairdocs.org/stc/ST01478AT): Install cockpit window sunvisor monorail system. Textron Aviation Inc - [STC ST02620AT](https://openairdocs.org/stc/ST02620AT): Installation of a LED Tail Position Navigation Light Replacement. Textron Aviation Inc - [STC ST02784AT](https://openairdocs.org/stc/ST02784AT): Installation of dual Innovative Solutions and Support (IS&S) Air Data Display Units (ADDU) and a single Analog Interface Unit (AIU). Textron Aviation Inc - [STC ST02851AT](https://openairdocs.org/stc/ST02851AT): Certification of Reduced Vertical Separation Minimum (RVSM) Operational Capability. Textron Aviation Inc - [STC ST09573SC](https://openairdocs.org/stc/ST09573SC): Modification of Collins Avionics VHF Communications Radio systems with 8.33 kHz frequency spacing capability. Textron Aviation Inc - [STC SA2188CE](https://openairdocs.org/stc/SA2188CE): Incorporate aircraft interior improvements. Textron Aviation Inc - [STC SA2205CE](https://openairdocs.org/stc/SA2205CE): Installation of second Collins ADF-60A system. Textron Aviation Inc - [STC SA2215CE](https://openairdocs.org/stc/SA2215CE): Installation of Fairchild Model F-800, digital flight data recorder. Textron Aviation Inc - [STC SA2216CE](https://openairdocs.org/stc/SA2216CE): Installation of Fairchild Model A100A cockpit voice recorder. Textron Aviation Inc - [STC SA2217CE](https://openairdocs.org/stc/SA2217CE): Installation of Sperry Instrument monitor system, Model CM-400. Textron Aviation Inc - [STC SA2218CE](https://openairdocs.org/stc/SA2218CE): Installation of copilot flight director, Sperry FZ-500. Textron Aviation Inc - [STC SA2219CE](https://openairdocs.org/stc/SA2219CE): Category II certification. Textron Aviation Inc - [STC SA2220CE](https://openairdocs.org/stc/SA2220CE): Installation of King Radio Corporation High Frequency Communication System Model KHF-950. Textron Aviation Inc All 117: https://openairdocs.org/aircraft/N520WS/stcs.md ## Related - Other Beech 400 aircraft: https://openairdocs.org/model/beech-400/aircraft.md - The Pratt & Whitney Canada JT15D 5 series engine: https://openairdocs.org/engine/pratt-whitney-canada-jt15d-5-series.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.