# N551LS: 1981 Cessna 551 - Status: Valid registration - Airframe: [Cessna 551](https://openairdocs.org/model/cessna-551) (registry code 2076605, 8 seats) - Engine: [Pratt & Whitney Canada JT15D-4 series](https://openairdocs.org/engine/pratt-whitney-canada-jt15d-4-series) (registry code 52112) - Data sheets: [TCDS A27CE](https://openairdocs.org/tcds/A27CE) (Textron Aviation Inc.) (OpenAirDocs) - Serial number: 551-0369 - Year built: 1981 - Type: Fixed wing multi engine - Engine type: Turbo-fan - Airworthiness: Standard, normal - Airworthiness date: February 28, 1992 - Certificate issued: May 29, 2019 - Expires: May 31, 2029 - Mode S code: A7042D - Registered owner: [Mixed Wing LLC](https://openairdocs.org/faa-owner/MIXED%20WING%20LLC) - Location: [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington) - Owner type: LLC - Owner's area on the map: 39.7357° N, 75.5321° W: Placed by OpenAirDocs: center of Wilmington, DE, 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=551LS - Page: https://openairdocs.org/aircraft/N551LS 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-4 model are included. ## ADs that may apply (OpenAirDocs): 24 in force ### Matched by airframe (Cessna 551) - [AD 2025-07-01](https://openairdocs.org/ad/2025-07-01): Air Data Computer · Synthetic Vision Electronic Flight Information System (Arrow STC SR09595RC or ST01523WI). Effective May 15, 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 2015-17-12](https://openairdocs.org/ad/2015-17-12): Air conditioning · Freon air conditioning system (Textron STC SA3849SW or 3 others). Effective Sep 29, 2015 - [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 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 2007-11-17](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 2006-06-03](https://openairdocs.org/ad/2006-06-03): Airplane flight manual (AFM) · Cessna 500, 501, 550 and 3 more. Effective Apr 20, 2006 - [AD 2004-08-15](https://openairdocs.org/ad/2004-08-15): TAWS8000 terrain awareness warning systems (TAWS) · Cessna 421, 500, 501 and 18 more. Effective Jun 7, 2004 - [AD 2004-09-05](https://openairdocs.org/ad/2004-09-05): Brake Stator Disks · Cessna 500, 501, 550 and 1 more. Effective Jun 2, 2004 - [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 2001-22-14](https://openairdocs.org/ad/2001-22-14): Fire Extinguishing System Bottle Cartridges · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 105 more. Effective Dec 10, 2001 - [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 98-04-38](https://openairdocs.org/ad/98-04-38): AFM - Limitations Section - Icing · Cessna 500, 501, 550 and 2 more. Effective Mar 25, 1998 - [AD 93-05-15](https://openairdocs.org/ad/93-05-15): Thrust Reverser Throttle Load Limiter · Cessna 500, 501, 550 and 4 more. Effective Apr 23, 1993 - [AD 90-07-10 R1](https://openairdocs.org/ad/90-07-10-R1): Air Conditioning System · Cessna 550, 551 and S550 with STC SA2698SW. Effective May 29, 1990 - [AD 90-06-13](https://openairdocs.org/ad/90-06-13): Vertical Gyro · Bombardier DHC-8-101, DHC-8-102, DHC-8-103 and 14 more. Effective Mar 30, 1990 - [AD 89-16-10](https://openairdocs.org/ad/89-16-10): Fuel Flow Transmitter · Cessna 550 and 551. Effective Sep 7, 1989 - [AD 80-09-09](https://openairdocs.org/ad/80-09-09): Dual Flight Director Installation · Cessna 500, 501, 550 and 1 more. Effective May 12, 1980 - [AD 79-12-06](https://openairdocs.org/ad/79-12-06): Upper & Lower Spar Cap Stems · Cessna 500, 501, 550 and 1 more. Effective Apr 10, 1980 ### Matched by engine (Pratt & Whitney Canada JT15D-4 series) - [AD 93-18-08](https://openairdocs.org/ad/93-18-08): High Pressure Turbine (HPT) Assembly · Pratt & Whitney Canada JT15D-1, JT15D-1A, JT15D-1B and 4 more. Effective Nov 24, 1993 - [AD 91-15-02](https://openairdocs.org/ad/91-15-02): Gas Generator Case · Pratt & Whitney Canada JT15D-4B. Effective Aug 22, 1991 - [AD 87-10-01](https://openairdocs.org/ad/87-10-01): Fan Blades · Pratt & Whitney Canada JT15D-1, JT15D-1A, JT15D-1B and 3 more. Effective Jul 15, 1988 - [AD 78-17-06](https://openairdocs.org/ad/78-17-06): Fuel Manifold Adapter Assemblies · Pratt & Whitney Canada JT15D-4. Effective Aug 31, 1978 - [AD 74-26-05](https://openairdocs.org/ad/74-26-05): Fuel Control Units · Pratt & Whitney Canada JT15D-1 and JT15D-4. Effective Jan 2, 1975 ## Information bulletins (advisory) (3 in force) - [SAIB AIR-21-15R1](https://openairdocs.org/saib/AIR-21-15R1): Navigation System. Issued Sep 16, 2021 - [SAIB NM-14-08](https://openairdocs.org/saib/NM-14-08): Fuselage: Aerodynamic Fairings. Issued Jan 23, 2014 - [SAIB NM-10-13](https://openairdocs.org/saib/NM-10-13): Navigation: Flight Management System. Issued Jan 7, 2010 - [SAIB AIR-21-15](https://openairdocs.org/saib/AIR-21-15) (historical): Navigation System. Issued Aug 26, 2021 ## NTSB investigations None matched to N551LS. ## FAA accident and incident reports None matched to N551LS. ## 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) (161, 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 551) - [STC SA12345IB](https://openairdocs.org/stc/SA12345IB): Replacement of the Halon Type 1211 portable fire extinguisher with the 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 SA02017WI](https://openairdocs.org/stc/SA02017WI): The Installation of the Parker-Meggitt iPRESS™ System. 3S Certification LLC - [STC SA11158SC](https://openairdocs.org/stc/SA11158SC): Demonstration of aircraft tolerance to potential electromagnetic interference from certain Transmitting Potable Electronic Devices (T-PEDS). Liberty Partners Inc - [STC SA09887AC](https://openairdocs.org/stc/SA09887AC): Installation of an Avionica MK-III mini Quick Access Recorder (QAR) and optional 4G or LTE Avionica Cellular Module (avCM. Aircraft Systems and Manufacturing Inc - [STC SA04051CH](https://openairdocs.org/stc/SA04051CH): Certification of Automatic Dependent Surveillance - Broadcast (ADS-B) Out System with Rockwell Collins TDR-94/-94D Transponders. CMD Flight Solutions LLC - [STC ST02432LA](https://openairdocs.org/stc/ST02432LA): Installation of Dual Garmin GTN 6XX/7XX Series Global Navigation System with Structural Antenna and WAAS approval; Garmin GMA 35 Audio Panel; Dual Garmin GTX 33 Mode S Transponders; Garmin GWX 70 Weather Radar; and Garmin GDL-88 ADS-B Transceiver on airplane models with a SPZ-500AFCS. JETTECH LLC - [STC SA02658SE](https://openairdocs.org/stc/SA02658SE): Installation of Garmin GI 275 Multi-Function Display System. Garmin International Inc - [STC SA2005SO](https://openairdocs.org/stc/SA2005SO): Installation of a third stand-by attitude gyro and dedicated power supply AIM P/N PE 24-1RM. Summit Aviation Inc - [STC SA02010WI](https://openairdocs.org/stc/SA02010WI): Installation of the Mid-Continent Instruments & Avionics MD23 FLEX Custom Function Display (CFD). Mid-Continent Instruments and Avionics - [STC ST00011WI](https://openairdocs.org/stc/ST00011WI): Installation of Concorde RG380E/40 and 40B battery. Aero-Mach Wilco LLC - [STC SA1298GL](https://openairdocs.org/stc/SA1298GL): Installation of Cleveland main wheels and brakes. Kaman Corporation Aircraft Wheel and Brake LLC - [STC SA883GL](https://openairdocs.org/stc/SA883GL): Install aircraft wheel and brake conversion kit 199-137. Kaman Corporation Aircraft Wheel and Brake LLC - [STC SA02273SE](https://openairdocs.org/stc/SA02273SE): Installation of a Crane Aerospace & Electronics Tire Sensor Assembly. ELDEC Corporation - [STC SA02265SE](https://openairdocs.org/stc/SA02265SE): Installation of a camera housing. Airborne Sensor LLC - [STC SA8458SW](https://openairdocs.org/stc/SA8458SW): Installation of quick release nose radome latch mechanisms. Sierra Industries Ltd - [STC SA01156WI](https://openairdocs.org/stc/SA01156WI): Installation of IS&S Air Data System with Reduced Vertical Separation Minimum (RVSM) compliant Dual Air Data System. Blackhawk Aerospace Technologies Inc - [STC SA01196WI](https://openairdocs.org/stc/SA01196WI): Installation of Universal Avionics EFI-550 2-Display EFIS System. Data required: (1) Columbia Avionics, Inc. Master Document List No. 30141145, Revision 3, dated September 24, 2003; and (2) FAA Approved Flight Manual Supplement 30141160, dated September 30, 2003, or later FAA Approved Revisions to (1) or (2). Blackhawk Aerospace Technologies Inc - [STC SA01469WI](https://openairdocs.org/stc/SA01469WI): Installation of Universal Avionics EFI-890R Flat Panel EFIS System. Blackhawk Aerospace Technologies Inc - [STC SA01697WI](https://openairdocs.org/stc/SA01697WI): Installation of Garmin GTN Series GPS/Comm/Nav Systems with optional Garmin GDL-69/A XM Weather Data Link, GTX-33 Series Transponders and optional Bendix/King KMR-675 Marker Beacon Receiver. Blackhawk Aerospace Technologies Inc - [STC ST00662WI](https://openairdocs.org/stc/ST00662WI): Installation of Bendix/King EFS-50 Two-Tube (EFIS) Electronic Flight Instrumentation System. Blackhawk Aerospace Technologies Inc - [STC ST01162WI](https://openairdocs.org/stc/ST01162WI): Reduced Vertical Separation Minimum (RVSM) group airworthiness approval of the Cessna Aircraft Model 500, 501, 550 and 551. Blackhawk Aerospace Technologies Inc - [STC ST02989AT](https://openairdocs.org/stc/ST02989AT): Installation of a modified Glareshield. Continental Aerospace Technologies Inc - [STC SA02075SE](https://openairdocs.org/stc/SA02075SE): Installation of a Mid-Continent MD835( ) Lithium Ion Battery. Mid-Continent Instrument Co. Inc - [STC ST02642AT](https://openairdocs.org/stc/ST02642AT): Installation of a RVSM Air Data System. Carlisle Interconnect Technologies Inc - [STC SA04514NY](https://openairdocs.org/stc/SA04514NY): Single/Dual Transponder System ADS-B Upgrade. Scandinavian Avionics Design ApS - [STC SA01452CH](https://openairdocs.org/stc/SA01452CH): Installation of an air ambulance conversion kit. Med-Pac Inc - [STC SA01714WI](https://openairdocs.org/stc/SA01714WI): Installation of a Garmin transponders: (a) GTX 330/330D/33/33D with ADS-B Out functionality; (b) GTX 335/335R/345/345R with ADS-B Out and In functionality; or (c) GTX 335R/345R with ADS-B Out functionality in select airplanes installed with G950/G1000 systems. Garmin International Inc - [STC SA2698SW](https://openairdocs.org/stc/SA2698SW): Installation of freon air conditioning system. Air Comm Corporation - [STC SA2916SW](https://openairdocs.org/stc/SA2916SW): Installation of alternate gear horn switch. Air Comm Corporation - [STC SA04176NY](https://openairdocs.org/stc/SA04176NY): Installation of Cabin Entry Step Assembly. Skyway Group Inc - [STC SA00153SE](https://openairdocs.org/stc/SA00153SE): Installation of emergency medical stretcher, oxygen, and electrical systems. LifePort LLC - [STC ST01898WI](https://openairdocs.org/stc/ST01898WI): Installation of the RVSM capable Garmin G600 with GDU-1060 Touch Screen Primary Flight Display (PFD). JETTECH LLC - [STC SA04165NY](https://openairdocs.org/stc/SA04165NY): Installation of Latitude Technologies Skynode S200 Satcom system must be performed. Latitude Technologies Corporation - [STC SA02013CH](https://openairdocs.org/stc/SA02013CH): Installation of Avidyne Corporation Traffic Advisory System (TAS). Avidyne Corporation - [STC SA01933LA-D](https://openairdocs.org/stc/SA01933LA-D): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System. Garmin International Inc - [STC SA03973NY](https://openairdocs.org/stc/SA03973NY): Replacement of existing TCAS 7.0 by TCAS 7.1. Scandinavian Avionics Design ApS - [STC ST00276WI](https://openairdocs.org/stc/ST00276WI): Installation of Kedeg Company 21BC11e Coaleser Assemly. Purolator Facet, Inc - [STC ST00366WI](https://openairdocs.org/stc/ST00366WI): Installation of Keddeg Company P/N 21BC115 Coalescer Assembly. Purolator Facet, Inc - [STC SA215RM](https://openairdocs.org/stc/SA215RM): Installation of extended width cabin door. Sierra Industries Inc - [STC SA3885NM](https://openairdocs.org/stc/SA3885NM): Installation of medical air transport unit. Sierra Industries Ltd - [STC SA4099NM](https://openairdocs.org/stc/SA4099NM): Installation of a replacement cabin door hinge assembly. Sierra Industries Ltd - [STC ST09630AC](https://openairdocs.org/stc/ST09630AC): Installation of Meggitt Avionics Engine Instrument Display System. Sierra Industries Ltd - [STC ST09718AC](https://openairdocs.org/stc/ST09718AC): Installation of Artex C406 (406 MHz) Series emergency locator transmitter, antenna, and remote switch assembly. Sierra Industries Ltd - [STC SA09010SC](https://openairdocs.org/stc/SA09010SC): Installation of a pilot's control wheel mounted, alternate gear horn silence switch. Sierra Industries Ltd - [STC SA09229SC](https://openairdocs.org/stc/SA09229SC): Removal of mechanical factory nose baggage door stop assemblies and installation of pneumatic gas cylinder baggage door openers. Sierra Industries Ltd - [STC SA09862AC](https://openairdocs.org/stc/SA09862AC): Removal of original equipment manufacturer ladder and installation of a new design cabin entrance step assembly. Sierra Industries Ltd - [STC SA8828SW](https://openairdocs.org/stc/SA8828SW): Installation of inertial reel assembly on pilot and co-pilot shoulder harnesses. Sierra Industries Ltd - [STC SA1732CE](https://openairdocs.org/stc/SA1732CE): Dual camera installation. Textron Aviation Inc - [STC SA1886CE](https://openairdocs.org/stc/SA1886CE): Installation of 36-inch cargo door. Textron Aviation Inc All 161: https://openairdocs.org/aircraft/N551LS/stcs.md ## Related - Other Cessna 551 aircraft: https://openairdocs.org/model/cessna-551/aircraft.md - The Pratt & Whitney Canada JT15D-4 series engine: https://openairdocs.org/engine/pratt-whitney-canada-jt15d-4-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.