SA00225IBEngine and powerplant
Installation of a Cockpit Combustion Heater Exhaust Extension on the Right-Hand Side (RHS) of the Fuselage.
FAA holder: KASI Aviation Services Inc.
Aircraft STC directory
Piper Aircraft PA-31-350 STCs
The Jun 30, 2026 FAA DRS snapshot contains 57 selected supplemental type certificates with status Current whose public applicability data names the Piper Aircraft PA-31-350. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
57
listed Current at snapshot
23
holder directories
13
modification categories
Oct 3, 2024
latest recorded revision
Modification demand surface
Other aircraft modifications26
Engine and powerplant6
Cargo and special mission4
Aircraft structures4
Flight controls3
Avionics2
Cabin and interiors2
Aircraft performance2
Landing gear and brakes2
Propellers2
Fuel systems2
Electrical systems1
Safety and emergency equipment1
Recorded holders
BLR Aerospace LLC.6Mike Jones Aircraft Sales Inc.5Kaman Corporation Aircraft Wheel and Brake LLC3S-TEC Corporation3Hartzell Engine Technologies, LLC3Garmin International Inc2Honeywell International Inc2Airline Fueling Inc.2Aviation Fabricators Inc2FFC Manufacturing2Honeywell International Inc (Bendix King)1Certex Aviation LLC1LifePort LLC1Spectrum Aeromed LLC dba Spectrum Aeromed1Knots 2U Ltd.1BE Aerospace Inc. DBA SMR Technologies, Inc.1Griggs Aircraft Refinishing LLC1Aerotech Components Inc1Electronics International Inc.1McCauley Propeller Systems1
Recently revised PA-31-350 STCs
Showing the 57 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SA02571SE (PAGE 2)Avionics
Installation of Garmin G500/G600 TXi Integrated Avionics System (Primary Flight Display, Multi-Function Display, and Engine Indicating System Display).
FAA holder: Garmin International Inc.
SA295GLOther aircraft modifications
Install Cleveland conversion kit, P/N 199-83.
FAA holder: Kaman Corporation Aircraft Wheel and Brake LLC
SA563GLOther aircraft modifications
Installation of Cleveland conversion kit, P/N 199-100.
FAA holder: Kaman Corporation Aircraft Wheel and Brake LLC
SA721GLOther aircraft modifications
Install Parker Hannifin Wheels & Brakes Conversion Kit 199-119. (PA-31-350 modified by STC SA4678SW).
FAA holder: Kaman Corporation Aircraft Wheel and Brake LLC
SA09856ACCabin and interiors
Installation of BendixKing Aerowave 100 In-flight Data Link System for non-essential, non-required aircraft Cabin Systems & Equipments.
FAA holder: Honeywell International Inc (Bendix King)
SA1151SOEngine and powerplant
Installation of Hartzell four-blade Propellers, cowling changes, winglets or wingtip extension, optional governor arm adaptor, and optional engine isolator mounts.
FAA holder: Mike Jones Aircraft Sales Inc.
SA04083CHOther aircraft modifications
Installation of universal bracket and a sight/viewing hole in the front baggage compartment.
FAA holder: Certex Aviation LLC
SA09759DSFlight controls
Installation of an S-TEC 01326 Digital Flight Control System (DFCS).
FAA holder: S-TEC Corporation
SA01161WI-DFlight controls
Installation of the Bendix/King KFC 225 Flight Control System.
FAA holder: Honeywell International Inc
SA1529CE-DOther aircraft modifications
Installation of King KAS 297 altitude selector option.
FAA holder: Honeywell International Inc
SA00528SEElectrical systems
Installation of emergency medical stretcher and base, oxygen, and electrical systems.
FAA holder: LifePort LLC
SA02303NYCargo and special mission
Installation of a Single or Dual Port Fuselage Camera Hole Cutout.
FAA holder: Infinion Certification Engineering
SA1666GLCargo and special mission
Install air ambulance conversion.
FAA holder: Spectrum Aeromed LLC dba Spectrum Aeromed
SA04144NYCabin and interiors
Restricting the aircraft to six (6) seats (2 at 95, 2 at 132, 2 at 195, *1 at 242) for operation under 14 CFR Part 68 (BasicMed). * - Optional potty seat is exempt from this requirement, providing that it is placarded THIS SEAT NOT TO BE OCCUPIED FOR TAXI, TAKE-OFF OR LANDING.
FAA holder: Avpro Technical Services LLC
SA02153LA-D PAGE 2Avionics
Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System.
FAA holder: Garmin International Inc.
SA00039SEOther aircraft modifications
Vortex generators manufactured and installed. (T-1020).
FAA holder: BLR Aerospace LLC
SA00192SEAircraft performance
Vortex generators manufactured and installation of the Super Chieftain I takeoff weight increase kit.
FAA holder: BLR Aerospace LLC.
SA00202SEAircraft performance
Installation of the Super Chieftain II landing weight increase kit.
FAA holder: BLR Aerospace LLC.
SA00378SEAircraft structures
Boundary Layer Research, Inc, Wing Rib Reinforcement Modification. (and T-1020).
FAA holder: BLR Aerospace LLC.
SA5796NMOther aircraft modifications
Vortex generators IAW Document AA1113.
FAA holder: BLR Aerospace LLC.
SA02495AKLanding gear and brakes
Modified landing gear warning system installed.
FAA holder: Warbelow's Air Ventures, Inc.
SA01935LAOther aircraft modifications
Installation of external aft body strakes.
FAA holder: Aircraft Performance Modifications
SA10594SCOther aircraft modifications
Modification of the Monroe Automotive Equipment Co. (MAECO) Shimmy Dampener.
FAA holder: Knots 2U, Ltd
SA00377BOOther aircraft modifications
Installation of pneumatic de-icer timer kit.
FAA holder: BE Aerospace Inc. DBA SMR Technologies, Inc.
SA1161SWEngine and powerplant
Installation of nacelle fuel tanks.
FAA holder: Griggs Aircraft Refinishing LLC
SA00944CHOther aircraft modifications
Replace Janitrol combustion heater Model 81D94-X (XX) with C&D Associates combustion heater Model CD25K, CD35K, and CD45K.
FAA holder: Hartzell Engine Technologies, LLC
SA01751CHOther aircraft modifications
Installation of C&D Associates auxiliary rear combustion heater Model CD35K heater kit, P/N CD12031K9.
FAA holder: Hartzell Engine Technologies, LLC
SA02973CHOther aircraft modifications
Installation of C&D Associates Distribution Modification Kit P/N CD29151.
FAA holder: Hartzell Engine Technologies, LLC
SA1744SOEngine and powerplant
Installation of two nacelle locker(left side and right side) metal fuel tanks (22.6 gallons each).
FAA holder: Aircraft Restoration Corporation
SA02445AKSafety and emergency equipment
Installation of Aerox MSK-A Passenger Oxygen Mask, part number 4110-702.
FAA holder: Rust's Flying Service
SA02205AKLanding gear and brakes
Removal of Piper PA-31 series main landing gear inboard doors.
FAA holder: Arthur King
SA289CHOther aircraft modifications
Installation of Inline Pneumatic Air Filter, P/N CV1J4.
FAA holder: Aerotech Components Inc
SA01924CHCargo and special mission
Installation of provisions for a belly mounted camera.
FAA holder: Alt-Terra Survey, Inc.
SA02331AKAircraft structures
Installation of a Secondary Forward Baggage Door Latch in accordance with Plane Miracles LLC Master Data List, MDL1125AK, Revision IR, dated January 6, 2009, or later FAA approved revision.
FAA holder: Karl Zeiset
ST01494LA (PG 2)Other aircraft modifications
Installation of the FiberLite Aircraft Lighting System in accordance with Master Document List listed on Aircraft Model List (AML) Number ST01494LA, or later FAA approved revisions. No flight manual is required.
FAA holder: Superior Panel Technology
SA09285AC-DOther aircraft modifications
Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-727-20/30, according to Bulletin No. 827, Revision 6, dated 1-21-11 and Master Drawing List No. 921029, Revision F, dated 1-21-11 or later FAA Approved revisions of the above data (28 Volt System).
FAA holder: S-TEC Corporation
SA00014ATOther aircraft modifications
Installation of Lycoming model L/TIO-540-J2B engines in accordance with Colemill Enterprises, Inc. Installation Instructions for Modification of Piper Navajo Model PA-31-350 dated October 9, 1992, or later FAA approved, revision.
FAA holder: Mike Jones Aircraft Sales Inc.
SA00336ATOther aircraft modifications
Installation of winglets.
FAA holder: Mike Jones Aircraft Sales Inc.
SA1421SOFlight controls
Installation of 40:1 gear ratio wing flap transmissions and related changes in accordance with Colemill Enterprises, Inc., Installation Instructions dated February 16, 1983, or later FAA approved revision. This modification provides and equivalent means of compliance with paragraphs (a)1, (a)2, and (a)4 of AD 82-27-13 and restores the 40 (full) flap travel.
FAA holder: Mike Jones Aircraft Sales Inc.
SA2998SOPropellers
Installation of McCauley propeller governor (as shown in table on Page 2) in accordance with Colemill Enterprises installation instructions CM900-10 February 15, 1991.
FAA holder: Mike Jones Aircraft Sales Inc.
SA3610SWOther aircraft modifications
Installation of a stretcher in place of two passenger seats.
FAA holder: Airline Fueling Inc.
SA00961WIOther aircraft modifications
Stretcher installation per Aviation Fabricators STC Drawing List AF-204, Rev A, dtd 7/7/97, stamped "FAA Approved" with an approval date of 4/13/01 or later FAA approved revision.
FAA holder: Aviation Fabricators Inc
SA01143ATFuel systems
Installation of left hand side and right hand side main tank fuel cell assemblies. (PA-31-350 S/N 5 THRU 7300923).
FAA holder: FFC Manufacturing
SA01988SE (PAGE 6)Engine and powerplant
Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) MVP-50P.
FAA holder: Electronics International Inc.
SA240CHEngine and powerplant
Installation of Aero Crafters' exhaust heater system kit.
FAA holder: Aero Crafter Products Inc.
SA00857CHPropellers
Installation of McCauley Propeller Model B3DF36C526/80HJA-0 and B3DF36C527/L80HJA-0, spinner assembly and optional de-icer.
FAA holder: McCauley Propeller Systems
SA09397AC-DOther aircraft modifications
Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-849.
FAA holder: S-TEC Corporation
SA00448DEOther aircraft modifications
Installation of Oilamatic preoiler system.
FAA holder: Oilamatic Inc
SA09524SCOther aircraft modifications
Conversion of existing Piper air conditioning system from R12 to R134a refrigerant.
FAA holder: Steinbach & Associates, Inc.
SA00963WIOther aircraft modifications
Installation of a heated windshield panel.
FAA holder: Aviation Fabricators Inc
SA1008EAOther aircraft modifications
Installation of single lamp logo light in horizontal tail.
FAA holder: DeVore Aviation Corporation of America, a New Mexico Corporation