# N331GP: 1979 Piper PA-44-180 - Status: Valid registration - Airframe: [Piper PA-44-180](https://openairdocs.org/model/piper-pa-44-180) (registry code 7104402, 4 seats) - Engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514) - Data sheets: [TCDS A19SO](https://openairdocs.org/tcds/A19SO) (Piper Aircraft Inc.) (OpenAirDocs) - Serial number: 44-7995277 - Year built: 1979 - Type: Fixed wing multi engine - Engine type: Reciprocating - Airworthiness: Standard, normal - Airworthiness date: March 26, 1979 - Mode S code: A39A2A - Registered owner: [Dodson International Parts Inc](https://openairdocs.org/faa-owner/DODSON%20INTERNATIONAL%20PARTS%20INC) - Location: [Rantoul, KS](https://openairdocs.org/faa-place/KS/Rantoul) - Owner type: Corporation - Owner's area on the map: 38.5420° N, 95.1245° W: Placed by OpenAirDocs at the center of ZIP code 66079, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=331GP - Page: https://openairdocs.org/aircraft/N331GP 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 O&VO-360 model are included. ## ADs that may apply (OpenAirDocs): 65 in force ### Matched by airframe (Piper PA-44-180) - [AD 2024-10-04](https://openairdocs.org/ad/2024-10-04): Wing, Attach Fittings · Piper PA-28-181, PA-28R-201, PA-44-180 and 1 more. Effective Jun 6, 2024 - [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 2009-05-05](https://openairdocs.org/ad/2009-05-05): Primary Flight Displays · Avidyne Primary Flight Display (S-TEC STC SA09543AC-D or 2 others). Effective Apr 3, 2009 - [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 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 2004-14-12](https://openairdocs.org/ad/2004-14-12): Control wheel attaching hardware · Piper PA-28-161, PA-28-181, PA-28R-201 and 8 more. Effective Aug 10, 2004 - [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 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 - [AD 81-10-04](https://openairdocs.org/ad/81-10-04): Aileron Modification · Piper PA-44-180. Effective Apr 30, 1981 - [AD 81-10-01](https://openairdocs.org/ad/81-10-01): Nose Cone Spars · Piper PA-44-180. Effective Apr 30, 1981 - [AD 80-21-11](https://openairdocs.org/ad/80-21-11): Left and Right Ailerons · Piper PA-44-180. Effective Oct 17, 1980 - [AD 80-14-03](https://openairdocs.org/ad/80-14-03): Bendix, King or Narco Transmitters · Piper PA-28-161, PA-28-181, PA-28-201T and 16 more. Effective Jul 1, 1980 - [AD 80-12-03](https://openairdocs.org/ad/80-12-03): Nose Landing Gear · Piper PA-44-180. Effective Jun 3, 1980 - [AD 79-12-11](https://openairdocs.org/ad/79-12-11): Fuel Primer Modification Kits · Piper PA-44-180. Effective Jun 21, 1979 - [AD 79-05-11](https://openairdocs.org/ad/79-05-11): Engine Power Control Loss · Piper PA-44-180. Effective Mar 15, 1979 - [AD 79-02-02](https://openairdocs.org/ad/79-02-02): Fuel Supply Lines · Piper PA-44-180. Effective Jan 24, 1979 - [AD 78-25-03](https://openairdocs.org/ad/78-25-03): Hose Assemblies · Piper PA-23-250, PA-28R-180, PA-28R-200 and 11 more. Effective Jan 15, 1979 ### Matched by engine (Lycoming O&VO-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 2022-16-03](https://openairdocs.org/ad/2022-16-03): Engine (RECIPROCATING) · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 236 more. Effective Aug 15, 2022 - [AD 2020-25-12](https://openairdocs.org/ad/2020-25-12): Reciprocating Engine Power Section · Superior Air Parts IO-360-A1A1, IO-360-A1A2, IO-360-A2A1 and 146 more. Effective Jan 15, 2021 - [AD 2017-16-11](https://openairdocs.org/ad/2017-16-11): Reciprocating Engine Power Section · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-360-B1G6 and 93 more. Effective Aug 15, 2017 - [AD 2012-19-01](https://openairdocs.org/ad/2012-19-01): Crankshafts · Lycoming Engines AEIO-360-A1A, AEIO-360-A1B, AEIO-360-A1B6 and 321 more. Effective Oct 24, 2012 - [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 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 2007-04-19 R1](https://openairdocs.org/ad/2007-04-19-R1): SAP cylinder assemblies · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 314 more. Effective May 7, 2007 - [AD 2006-10-21](https://openairdocs.org/ad/2006-10-21): ECi connecting rods · Engine Components Reciprocating Engine Connecting Rods, AEIO-360-B1B, AEIO-360-B1D and 171 more. Effective Jun 22, 2006 - [AD 2006-06-16](https://openairdocs.org/ad/2006-06-16): Crankshaft · Lycoming Engines AEIO-360-A1B6, AEIO-360-A1E6, IO-360-A1B6 and 18 more. Effective Apr 27, 2006 - [AD 2005-19-11](https://openairdocs.org/ad/2005-19-11): Crankshafts · Lycoming Engines AEIO-360-A1B6, AEIO-360-A1E6, AEIO-540-D4A5 and 59 more. Effective Oct 21, 2005 - [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 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 1998 - [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 96-09-10](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 95-26-02](https://openairdocs.org/ad/95-26-02): Aviation Gasoline · Lycoming Engines IO-320-B1A, IO-320-B1B, IO-320-B1C and 182 more. Effective Jan 24, 1996 - [AD 95-07-01](https://openairdocs.org/ad/95-07-01): Connecting Rod Bolt · Lycoming Engines AEIO-360-A1E, AEIO-360-B1G6, AEIO-360-H1A and 177 more. Effective Apr 12, 1995 - [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 87-10-06 R1](https://openairdocs.org/ad/87-10-06-R1): Rocker Arm Assembly · Lycoming Engines IO-360-B4, IVO-360-A1A, O-340-A1A and 243 more. Effective Sep 1, 1989 - [AD 89-04-02](https://openairdocs.org/ad/89-04-02): Carburetors · Continental Motors O-470-11, O-470-11-CI, O-470-11B and 175 more. Effective Mar 8, 1989 - [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 81-16-05](https://openairdocs.org/ad/81-16-05): Magnetos · Lycoming Engines AEIO-320-E1B, AEIO-320-E2B, AEIO-360-B1G6 and 234 more. Effective Aug 6, 1981 - [AD 80-14-07](https://openairdocs.org/ad/80-14-07): Upper Exhaust Valve Spring Seats · Lycoming Engines LO-360-E1A6D, O-320-H1AD, O-320-H1BD and 5 more. Effective Jul 7, 1980 - [AD 79-10-03 R2](https://openairdocs.org/ad/79-10-03-R2): Engine Mounting Bracket Attaching Bolts · Lycoming Engines LO-360-E1A6D, O-320-H2AD and O-360-E1A6D. Effective Jul 1, 1980 - [AD 80-06-05](https://openairdocs.org/ad/80-06-05): Magnetos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 254 more. Effective Mar 28, 1980 - [AD 79-15-02](https://openairdocs.org/ad/79-15-02): Channel Plug In Carburetor · Lycoming Engines LO-360-A1G6D and O-360-A1G6D. Effective Jul 20, 1979 - [AD 75-08-09](https://openairdocs.org/ad/75-08-09): Oil Pump Drive Shaft · Lycoming Engines AEIO-360-A1B, AEIO-360-A1B6, AEIO-360-A1C and 365 more. Effective Aug 18, 1977 - [AD 73-23-01](https://openairdocs.org/ad/73-23-01): Piston Pin Assembly · Lycoming Engines AIO-360-A1A, AIO-360-A1B, AIO-360-A2A and 215 more. Effective Jan 13, 1977 - [AD 69-24-03](https://openairdocs.org/ad/69-24-03): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 321 more. Effective Nov 29, 1969 - [AD 66-06-03](https://openairdocs.org/ad/66-06-03): Connecting Rod Assemblies · Lycoming Engines GO-435-C2 (O-435-17), GO-435-C2A, GO-435-C2A2 and 317 more. Effective Jan 16, 1969 - [AD 67-01-04](https://openairdocs.org/ad/67-01-04): Oil Filters · Full flow oil filter (Superior Flow STC SA401SW or 2 others). Effective Jan 2, 1967 - [AD 66-20-04](https://openairdocs.org/ad/66-20-04): Oil Filter Adapter Gasket · Lycoming Engines IO-320-A1A, IO-320-A2A, IO-320-B1A and 121 more. Effective Aug 27, 1966 - [AD 64-16-05](https://openairdocs.org/ad/64-16-05): AC Pumps · Lycoming Engines HIO-360-B1A, HIO-360-B1B, IO-320-B1A and 86 more. Effective Jul 10, 1964 - [AD 63-22-03](https://openairdocs.org/ad/63-22-03): Carburetors · Continental Motors GO-300-A, GO-300-B, GO-300-C and 143 more. Effective Dec 2, 1963 - [AD 59-10-07](https://openairdocs.org/ad/59-10-07): Cylinder Baffle Clamps · Lycoming Engines GO-480-A1A, GO-480-B, GO-480-B1A6 and 58 more ### Historical (superseded or no longer in force) - [AD 2008-06-28 R1](https://openairdocs.org/ad/2008-06-28-R1) (historical): Primary Flight Displays (PFDs) · Avidyne Primary Flight Displays, 441, LC41-550FG and 22 more. Effective Apr 10, 2008 - [AD 2008-06-28](https://openairdocs.org/ad/2008-06-28) (historical): Primary flight display · Avidyne Primary Flight Display (S-TEC STC SA09543AC-D or 2 others). Effective Apr 10, 2008 - [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 2008-19-05](https://openairdocs.org/ad/2008-19-05) (historical): Parallel Valve'' reciprocating engines · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 262 more. Effective Oct 20, 2008 - [AD 2006-20-09](https://openairdocs.org/ad/2006-20-09) (historical): Certain crankshafts replacing · Lycoming Engines AEIO-360-A1B6, AEIO-360-A1E6, AEIO-540-D4A5 and 82 more. Effective Nov 3, 2006 - [AD 2005-26-10](https://openairdocs.org/ad/2005-26-10) (historical): ECi cylinder assemblies. · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 413 more. Effective Jan 31, 2006 - [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) (21 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-11-37](https://openairdocs.org/saib/CE-11-37): Engine Oil: Oil Filter Interference. Issued May 31, 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 CE-08-13](https://openairdocs.org/saib/CE-08-13): Electrical Power. Issued Feb 27, 2008 - [SAIB CE-07-08](https://openairdocs.org/saib/CE-07-08): Avidyne Primary Flight display (PFD). Issued Oct 31, 2006 - [SAIB CE-01-30](https://openairdocs.org/saib/CE-01-30): . Issued Jul 11, 2001 - [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-13-06](https://openairdocs.org/saib/NE-13-06): Pushrod Shroud Spring Retainers, Engine Components Part No. AEL14995, for Lycoming Engines 320, 360, and 540 Series Engines. Issued Nov 21, 2012 - [SAIB NE-08-26R3](https://openairdocs.org/saib/NE-08-26R3): Magneto/Distributor. Issued Mar 31, 2011 - [SAIB NE-06-32R1](https://openairdocs.org/saib/NE-06-32R1): Reciprocating Engine - Crankshaft. Issued Sep 10, 2008 - [SAIB NE-03-18](https://openairdocs.org/saib/NE-03-18): . Issued Jan 22, 2003 - [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-08-26R1](https://openairdocs.org/saib/NE-08-26R1) (historical): Dual Magnetos. Issued Jul 8, 2008 - [SAIB NE-08-32](https://openairdocs.org/saib/NE-08-32) (historical): Propeller Governor Set Screw. Issued Jul 3, 2008 - [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 (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB WPR10LA210](https://openairdocs.org/ntsb/WPR10LA210), Apr 21, 2010: Piper PA-44-180 (N331GP), Tooele, UT, substantial damage. Probable cause: The complete loss of power in one engine due to fuel starvation as a result of the pilot's failure to reposition the cross-feed valve prior to takeoff and the flight instructor's failure to monitor… ## FAA accident and incident reports (2) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 20100420032629A](https://openairdocs.org/incident/20100420032629A), Apr 20, 2010: Piper PA-44-180 (N331GP), Toole, UT, Substantial damage. Flight instructor stated that after a touch and go, the student throttled up both engines and over the departure end of the runway numbers the left engine went… - [Incident 19991112031609I](https://openairdocs.org/incident/19991112031609I), Nov 12, 1999: Piper PA44180 (N331GP), Uvalde, TX, Minor damage. (-23) Pilot reported that as aircraft was on take-off roll on runway 15/33 three deer ran across the runway in front of the aircraft. The pilot attempted to… ## Service difficulty reports None filed for this aircraft. ## Related - Other Piper PA-44-180 aircraft: https://openairdocs.org/model/piper-pa-44-180/aircraft.md - STCs for the Piper PA-44-180: https://openairdocs.org/model/piper-pa-44-180/stcs.md - The Lycoming O&VO-360 series engine: https://openairdocs.org/engine/lycoming-o-vo-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.