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
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
Install Cleveland conversion kit, P/N 199-83.
FAA holder: Kaman Corporation Aircraft Wheel and Brake LLC
Installation of Cleveland conversion kit, P/N 199-100.
FAA holder: Kaman Corporation Aircraft Wheel and Brake LLC
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
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)
Installation of an S-TEC 01326 Digital Flight Control System (DFCS).
FAA holder: S-TEC Corporation
Installation of the Bendix/King KFC 225 Flight Control System.
FAA holder: Honeywell International Inc
Installation of King KAS 297 altitude selector option.
FAA holder: Honeywell International Inc
Installation of a Single or Dual Port Fuselage Camera Hole Cutout.
FAA holder: Infinion Certification Engineering
Install air ambulance conversion.
FAA holder: Spectrum Aeromed LLC dba Spectrum Aeromed
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
Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System.
FAA holder: Garmin International Inc.
Vortex generators manufactured and installed. (T-1020).
FAA holder: BLR Aerospace LLC
Installation of the Super Chieftain II landing weight increase kit.
FAA holder: BLR Aerospace LLC.
Boundary Layer Research, Inc, Wing Rib Reinforcement Modification. (and T-1020).
FAA holder: BLR Aerospace LLC.
Vortex generators IAW Document AA1113.
FAA holder: BLR Aerospace LLC.
Modified landing gear warning system installed.
FAA holder: Warbelow's Air Ventures, Inc.
Installation of external aft body strakes.
FAA holder: Aircraft Performance Modifications
Installation of pneumatic de-icer timer kit.
FAA holder: BE Aerospace Inc. DBA SMR Technologies, Inc.
Installation of nacelle fuel tanks.
FAA holder: Griggs Aircraft Refinishing LLC
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
Installation of C&D Associates auxiliary rear combustion heater Model CD35K heater kit, P/N CD12031K9.
FAA holder: Hartzell Engine Technologies, LLC
Installation of C&D Associates Distribution Modification Kit P/N CD29151.
FAA holder: Hartzell Engine Technologies, LLC
Installation of two nacelle locker(left side and right side) metal fuel tanks (22.6 gallons each).
FAA holder: Aircraft Restoration Corporation
Installation of Aerox MSK-A Passenger Oxygen Mask, part number 4110-702.
FAA holder: Rust's Flying Service
Installation of Inline Pneumatic Air Filter, P/N CV1J4.
FAA holder: Aerotech Components Inc
Installation of provisions for a belly mounted camera.
FAA holder: Alt-Terra Survey, Inc.
View record
Installation of winglets.
FAA holder: Mike Jones Aircraft Sales Inc.
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.
Installation of a stretcher in place of two passenger seats.
FAA holder: Airline Fueling Inc.
Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) MVP-50P.
FAA holder: Electronics International Inc.
Installation of Aero Crafters' exhaust heater system kit.
FAA holder: Aero Crafter Products Inc.
Installation of Oilamatic preoiler system.
FAA holder: Oilamatic Inc
Conversion of existing Piper air conditioning system from R12 to R134a refrigerant.
FAA holder: Steinbach & Associates, Inc.
Installation of a heated windshield panel.
FAA holder: Aviation Fabricators Inc
Installation of single lamp logo light in horizontal tail.
FAA holder: DeVore Aviation Corporation of America, a New Mexico Corporation