# N56DF: 1980 Piper PA-44-180T - Status: Valid registration - Airframe: [Piper PA-44-180T](https://openairdocs.org/model/piper-pa-44-180t) (registry code 7104404, 4 seats) - Engine: [Lycoming T0-360 series](https://openairdocs.org/engine/lycoming-t0-360-series) (registry code 41528) - Data sheets: [TCDS A19SO](https://openairdocs.org/tcds/A19SO) (Piper Aircraft Inc.), [TCDS E26EA](https://openairdocs.org/tcds/E26EA) (Lycoming Engines) (OpenAirDocs) - Serial number: 44-8107030 - Year built: 1980 - Type: Fixed wing multi engine - Engine type: Reciprocating - Airworthiness: Standard, normal - Airworthiness date: November 24, 1980 - Certificate issued: March 11, 2023 - Expires: March 31, 2030 - Mode S code: A724E2 - Registered owner: [Thorpe Arthur N Jr](https://openairdocs.org/faa-owner/THORPE%20ARTHUR%20N%20JR) - Location: [Salisbury, MD](https://openairdocs.org/faa-place/MD/Salisbury) - Owner type: Individual - Owner's area on the map: 38.3494° N, 75.6785° W: Placed by OpenAirDocs at the center of ZIP code 21801, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=56DF - Page: https://openairdocs.org/aircraft/N56DF From the FAA registry file of October 21, 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 Lycoming T0-360 model are included. ## ADs that may apply (OpenAirDocs): 31 in force ### Matched by airframe (Piper PA-44-180T) - [AD 2023-09-09](https://openairdocs.org/ad/2023-09-09): Exhaust Turbine System (Recip) · Aerostar PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P) and 292 more. Effective Jul 17, 2023 - [AD 2022-03-15](https://openairdocs.org/ad/2022-03-15): Fuel Quantity Indicator · Garmin G3X Touch Electronic Flight Instrument System (STC SA01899WI). Effective Mar 21, 2022 - [AD 2015-26-08](https://openairdocs.org/ad/2015-26-08): Rudder Control System · Piper PA-44-180 and PA-44-180T. Effective Jan 20, 2016 - [AD 2013-02-13](https://openairdocs.org/ad/2013-02-13): Stabilizer Control System · Piper PA-28-140, PA-28-150, PA-28-151 and 33 more. Effective Mar 11, 2013 - [AD 2010-15-10](https://openairdocs.org/ad/2010-15-10): Control wheel shafts · Piper PA-28-140, PA-28-150, PA-28-151 and 33 more. Effective Aug 31, 2010 - [AD 2005-15-10](https://openairdocs.org/ad/2005-15-10): Combustion heater fuel pumps · Piper PA-34-200T, PA-34-220T, PA-44-180 and 1 more. Effective Aug 26, 2005 - [AD 2004-25-16 R1](https://openairdocs.org/ad/2004-25-16-R1): Fuel regulator shutoff valve · Bombardier CL-215-1A10, CL-215-6B11 (CL-215T Variant), CL-215-6B11 (CL-415 Variant) and 64 more. Effective Jun 20, 2005 - [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 98-21-21 R1](https://openairdocs.org/ad/98-21-21-R1): Electric Inflatable Door Seals · Cessna 17-30, 17-30A, 17-31 and 267 more. Effective May 1, 2000 - [AD 85-02-05 R1](https://openairdocs.org/ad/85-02-05-R1): Piper P/N s 81090-02, 683-107 Placard Installation · Lavia Argentina PA-25, PA-25-235, PA-25-260 and 32 more. Effective Nov 21, 1997 - [AD 96-10-03](https://openairdocs.org/ad/96-10-03): Flap Handle Attach Bolt · Piper PA-28-140, PA-28-150, PA-28-151 and 28 more. Effective Jun 14, 1996 - [AD 94-14-14](https://openairdocs.org/ad/94-14-14): Nose Landing Gear Modification · Piper PA-28R-180, PA-28R-200, PA-28R-201 and 5 more. Effective Aug 19, 1994 - [AD 94-13-11](https://openairdocs.org/ad/94-13-11): Main Landing Gear Trunnion · Piper PA-34-200, PA-34-200T, PA-34-220T and 2 more. Effective Aug 12, 1994 - [AD 86-20-11](https://openairdocs.org/ad/86-20-11): Ammeter Replacement · Piper PA-44-180T. Effective Oct 17, 1986 - [AD 81-16-10](https://openairdocs.org/ad/81-16-10): Outboard Leading Edge Skin · Piper PA-44-180 and PA-44-180T. Effective Sep 17, 1981 ### Matched by engine (Lycoming T0-360 series) - [AD 2026-04-11](https://openairdocs.org/ad/2026-04-11): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 605 more. Effective Apr 8, 2026 - [AD 2012-03-07](https://openairdocs.org/ad/2012-03-07): Carburetor · Lycoming Engines GO-435, GO-435-C2 (O-435-17), GO-435-C2A and 389 more. Effective Mar 27, 2012 - [AD 2011-13-03](https://openairdocs.org/ad/2011-13-03): Turbocharger Turbine · Lycoming Engines LTO-360-E1A6D, O-540-L3C5D, TIGO-541-E1A and 20 more. Effective Jul 13, 2011 - [AD 2010-07-08](https://openairdocs.org/ad/2010-07-08): Turbochargers · Kelly Aerospace Energy Systems HIO-360-E1AD, HIO-360-E1BD, HIO-360-F1AD and 137 more. Effective Apr 19, 2010 - [AD 2009-26-12](https://openairdocs.org/ad/2009-26-12): Cylinder assemblies · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 264 more. Effective Feb 4, 2010 - [AD 2006-12-07](https://openairdocs.org/ad/2006-12-07): ECi cylinder assemblies · Aerostar AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 386 more. Effective Jul 11, 2006 - [AD 2004-10-14](https://openairdocs.org/ad/2004-10-14): Crankshaft gear · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 642 more. Effective Jun 25, 2004 - [AD 2002-12-07](https://openairdocs.org/ad/2002-12-07): Oil Filter Converter Plate Gasket or the Converter Plate Kit · Lycoming Engines HIO-360-E1AD, HIO-360-E1BD, HIO-360-F1AD and 95 more. Effective Jul 3, 2002 - [AD 98-02-08](https://openairdocs.org/ad/98-02-08): Crankshaft · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 216 more. Effective Mar 30, 1998 - [AD 97-15-11](https://openairdocs.org/ad/97-15-11): Cylinder kits · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 538 more. Effective Aug 12, 1997 - [AD 96-23-03](https://openairdocs.org/ad/96-23-03): High pressure fuel pumps · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 174 more. Effective Dec 23, 1996 - [AD 96-09-10](https://openairdocs.org/ad/96-09-10): Oil pump · Lycoming Engines AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A and 334 more. Effective Jul 15, 1996 - [AD 92-12-05](https://openairdocs.org/ad/92-12-05): Piston Pins · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 532 more. Effective Jul 10, 1992 - [AD 90-04-06 R1](https://openairdocs.org/ad/90-04-06-R1): Propeller Governor External Oil Line · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 427 more. Effective May 28, 1991 - [AD 80-04-03 R2](https://openairdocs.org/ad/80-04-03-R2): Hydraulic Lifter · Lycoming Engines LO-360-E1A6D, LTO-360-E1A6D, O-320-H1AD and 7 more. Effective Apr 25, 1988 - [AD 80-02-13](https://openairdocs.org/ad/80-02-13): Turbocharger Oil Drain Flange · Lycoming Engines TO-360-C1A6D. Effective Jan 22, 1980 ### Historical (superseded or no longer in force) - [AD 2003-11-14](https://openairdocs.org/ad/2003-11-14) (historical): Combustion heater fuel pump · Piper PA-34-200T, PA-34-220T, PA-44-180 and 1 more. Effective Jun 20, 2003 - [AD 2024-21-02](https://openairdocs.org/ad/2024-21-02) (historical): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 548 more. Effective Dec 5, 2024 - [AD 81-18-04 R2](https://openairdocs.org/ad/81-18-04-R2) (historical): Engine Oil Pump Driven Impeller and Shaft · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 376 more. Effective Jun 7, 1982 ## Information bulletins (advisory) (16 in force) - [SAIB AIR-21-10](https://openairdocs.org/saib/AIR-21-10): Wing, Attach Fittings (JASC 5740). Issued Jun 29, 2021 - [SAIB SW-18-31](https://openairdocs.org/saib/SW-18-31): NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM. Issued Nov 21, 2018 - [SAIB CE-11-12R1](https://openairdocs.org/saib/CE-11-12R1): Wings - PA-28, PA-32, PA-34, and PA-44 Rear Spar Corrosion at Fuselage Attach Fitting. Issued Dec 2, 2015 - [SAIB CE-14-23](https://openairdocs.org/saib/CE-14-23): Powerplant; Air Intake. Issued Aug 6, 2014 - [SAIB CE-11-42](https://openairdocs.org/saib/CE-11-42): Flight Controls: Control Cable/Pulley Inspections. Issued Jun 29, 2011 - [SAIB CE-11-10](https://openairdocs.org/saib/CE-11-10): Piper PA-28, PA-32, PA-34, and PA-44 Corrosion on Flap Hinges, Brackets, and Ribs. Issued Jan 5, 2011 - [SAIB CE-11-01](https://openairdocs.org/saib/CE-11-01): Stabilizers -Horizontal Stabilator Turnbuckle. Issued Oct 4, 2010 - [SAIB CE-10-30](https://openairdocs.org/saib/CE-10-30): Landing Gear Nose Gear Drag Link Bolt. Issued May 4, 2010 - [SAIB NE-06-31R6](https://openairdocs.org/saib/NE-06-31R6): Engine Lubricating Oils. Issued Sep 26, 2022 - [SAIB NE-19-08](https://openairdocs.org/saib/NE-19-08): Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders. Issued May 2, 2019 - [SAIB NE-08-32R1](https://openairdocs.org/saib/NE-08-32R1): Propeller Governor Idler Gear Shaft Set Screw. Issued May 13, 2016 - [SAIB NE-14-13](https://openairdocs.org/saib/NE-14-13): Reciprocating Engine - Cylinder Mounting Studs. Issued Mar 24, 2014 - [SAIB NE-08-26R3](https://openairdocs.org/saib/NE-08-26R3): Magneto/Distributor. Issued Mar 31, 2011 - [SAIB NE-05-40](https://openairdocs.org/saib/NE-05-40): . Issued Mar 18, 2005 - [SAIB NE-01-22](https://openairdocs.org/saib/NE-01-22): . Issued May 11, 2001 - [SAIB NE-00-22](https://openairdocs.org/saib/NE-00-22): . Issued May 23, 2000 - [SAIB CE-11-12](https://openairdocs.org/saib/CE-11-12) (historical): PA-28, PA-32, PA-34, and PA-44 Rear Spar Corrosion at Fuselage Attach Fitting. Issued Jan 5, 2011 - [SAIB NE-06-31R5](https://openairdocs.org/saib/NE-06-31R5) (historical): Engine Lubricating Oils. Issued Oct 19, 2011 - [SAIB NE-06-31R4](https://openairdocs.org/saib/NE-06-31R4) (historical): Engine Lubricating Oils. Issued Jul 6, 2011 - [SAIB NE-06-31R3](https://openairdocs.org/saib/NE-06-31R3) (historical): Engine Lubricating Oils. Issued Jul 22, 2009 - [SAIB NE-06-31R2](https://openairdocs.org/saib/NE-06-31R2) (historical): Engine Lubricating Oils. Issued Apr 29, 2009 - [SAIB NE-06-31R1](https://openairdocs.org/saib/NE-06-31R1) (historical): . Issued Apr 18, 2006 - [SAIB NE-06-31](https://openairdocs.org/saib/NE-06-31) (historical): . Issued Feb 27, 2006 ## NTSB investigations None matched to N56DF. ## FAA accident and incident reports None matched to N56DF. ## Service difficulty reports None filed for this aircraft. ## Related - Other Piper PA-44-180T aircraft: https://openairdocs.org/model/piper-pa-44-180t/aircraft.md - STCs for the Piper PA-44-180T: https://openairdocs.org/model/piper-pa-44-180t/stcs.md - The Lycoming T0-360 series engine: https://openairdocs.org/engine/lycoming-t0-360-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.