SA1187CEAvionics
Installation of King Model KCS 55A pictorial navigation (compass) system with optional KA 52 autopilot adapter.
FAA holder: Honeywell International Inc
Aircraft STC directory
New Piper Aircraft PA-31-350 STCs
The Jun 30, 2026 FAA DRS snapshot contains 24 selected supplemental type certificates with status Current whose public applicability data names the New 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.
24
listed Current at snapshot
16
holder directories
9
modification categories
Mar 31, 2020
latest recorded revision
Modification demand surface
Other aircraft modifications9
Avionics4
Cargo and special mission4
Engine and powerplant2
Electrical systems1
Fuel systems1
Cabin and interiors1
Landing gear and brakes1
Aircraft structures1
Recorded holders
Honeywell International Inc2Paul/ Lanna Egan LLC2Aviation Fabricators Inc2Hageland Aviation Services, Inc1SMR Technologies Inc1M-20 Oil Separators LLC1Shadin Company Inc1Avidyne Corporation1JAARS Inc.1Black Cat Aviation Inc.1Fargo Jet Center1LP Aero Plastics1SMR Technologies1TCB Composite Co.1Rockwell Collins Inc1Steinbach & Associates, Inc.1
Recently revised PA-31-350 STCs
Showing the 24 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SA1166CEAvionics
Installation of King KFC-200, 2 axis (3 optional) flight control system, autopilot only or autopilot with flight director.
FAA holder: Honeywell International Inc
SA3612NMElectrical systems
Installation of SAFT type 2376 nickel-cadmium battery.
FAA holder: Frontier Flying Service Inc.
SA3642NMEngine and powerplant
Installation of Hartzell HC-E3YR-2ATF/FC8468( )-8Q (left engine) and HC-E3YR-2ALTF/FJC8468( )-8Q (right engine) propeller assemblies. PA-31-350 (T-1020) and PA-31-350 (Chieftain). Serial numbers 31-7405218, 238, 485, 490; 31-7552043, 076; and 31-7652144 are ineligible for this installation.
FAA holder: Frontier Flying Service Inc.
SA02118AKOther aircraft modifications
Installation of damage protection plates to the inboard, lower side of the flaps.
FAA holder: Hageland Aviation Services, Inc.
SA1035GLCargo and special mission
Install Egan Aviation Air Ambulance Stretcher P/N 125 using Installation Kit P/N 800.
FAA holder: Paul/ Lanna Egan LLC
SA00505SEOther aircraft modifications
Installation of SMR technologies pneumatic de-icers.
FAA holder: SMR Technologies Inc
SA02033AT (PAGE 6)Engine and powerplant
Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line (47J series w stc's SH4-235SW, SH4-826SW or SH479SW).
FAA holder: M-20 Oil Separators LLC
SA454GLFuel systems
Installation of Shadin Co. fuel flow indicating system.
FAA holder: Shadin Company Inc
SA00161BO (3 OF 3Avionics
Installation of Avidyne Corporation FlightMax 700-00007-( ) EX500 Multi-Function Display.
FAA holder: Avidyne Corporation
SA02655AT (2 OF 2)Other aircraft modifications
Installation of JAARS Model F5K Automatic Flight Following System (AFFS) in Helio H-295 type aircraft.
FAA holder: JAARS Inc.
SA1130SWOther aircraft modifications
Installation of side facing seats in accordance with (1) Custom Aircraft Conversions, Inc. Drawing List 7057, Revision B, dated 3/20/70, and E.O. No. 2, dated 11/6/71; or (2) Aviation Fabricators, Inc. STC Drawing List AF-206, Rev. (D), dated 5/5/98, or later FAA approved revision.
FAA holder: Aviation Fabricators Inc
SA00057WICabin and interiors
Installation of single place composite commuter seats on the seat rail.
FAA holder: Aviation Fabricators Inc
SA1010NWCargo and special mission
Installation of a single or dual camera ports, optional camera door package, and associated components.
FAA holder: Hoogstra J. D.
SA1306SOOther aircraft modifications
Installation of a 2-place couch in accordance with Drawing Number CA2001, Revision "C", dated November 19, 1981, or later FAA approved Revisions.
FAA holder: Black Cat Aviation Inc.
SA02193AKLanding gear and brakes
Installation of a secondary flap interconnected landing gear warning system (Kit No. WAV-LGWS-001).
FAA holder: Warbelow's Air Ventures, Inc.
SA3401WEOther aircraft modifications
Installation of single piece windshield.
FAA holder: LP Aero Plastics
SA01229NYOther aircraft modifications
Installation of SLFMR Microwave Radiometer Pod.
FAA holder: Rick Aviation
SA01384CHOther aircraft modifications
Installation of various de-icer harnesses.
FAA holder: SMR Technologies
SA00554ATAircraft structures
Installation of composite aft spinner bulkhead and/or composite spinner.
FAA holder: TCB Composite Co.
SA1807SWAvionics
AP106 2-axis or 3-axis autopilot including yaw damper and FD-108 flight director.
FAA holder: Rockwell Collins Inc
ST09524SCOther aircraft modifications
Piper conversion of air conditioning systems from using R12 to R134a refrigerant on aircraft models listed. For PA-31-300 s/n 31-660, 31-712 thru 31-900, 31-7300901& up. For PA-31-325 sns 31-7400990 & up. PA-31-350 sns, 31-5001& 31-5003, 31-7305005 up.
FAA holder: Steinbach & Associates, Inc.