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Aircraft STC directory

Cessna Aircraft 172C STCs

The Jun 30, 2026 FAA DRS snapshot contains 140 selected supplemental type certificates with status Current whose public applicability data names the Cessna Aircraft 172C. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

140
listed Current at snapshot
81
holder directories
14
modification categories
May 20, 2025
latest recorded revision

Modification demand surface

Other aircraft modifications56Avionics18Engine and powerplant14Aircraft structures11Flight controls11Fuel systems7Landing gear and brakes7Cabin and interiors6Electrical systems3Propellers2Safety and emergency equipment2Aircraft performance1Cargo and special mission1Aircraft connectivity1

Recorded holders

Del-Air5Knots 2U Ltd.5Aircraft Development Co5Curry Aviation LLC4Avidyne Corporation3Brittain Industries, Inc3D'Shannon Products Ltd.3Athena Aircraft, LLC2Baumann Floats LLC2Steve's Aircraft2Selkirk Aviation2Stene Aviation Inc2Great Lakes Aero Products Inc2BAS Inc2Franklin Aircraft Engines Inc.2Horizon Instruments Inc2J P Instruments2Garmin AT Inc.2Honeywell International Inc2Technisonic Industries Limited2

Recently revised 172C STCs

Showing the 100 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA01801ATEngine and powerplant

For the Cessna 172 airplane models incorporating Lycoming O-320 engines: Modification of the standard exhaust system as documented in Laminar Flow Systems Installation Instructions Document, "Laminar Flow System Extractor Exhaust System" Revision A, dated, November 20, 1998 and Technical Drawing List, Book No. PFS-B-800, dated, November 16, 1998 or per Power Flow Systems, Inc. Installation Instructions Document PFS-0058-00, Rev. A, dated October 5, 2001 and Master Drawing List, Report No. PFS-0032-00, Rev. IR, dated August 10, 2000, or later FAA approved revisions. For the Cessna 172 airplane models incorporating Lycoming O-320 ,O-360 0r IO-360 engines: Modify the standard exhaust system as document in Power Flow Systems, Inc. Installation Instructions Document PFS-13250-00, Rev B, dated, December 9, 2002 and Master Drawing list PFS-13240-00, Rev, IR, dated October 3, 2002.

FAA holder: Power Flow Systems Inc

View record
SA293NWOther aircraft modifications

Installation of Franklin 6A-350-C1 or 6A-350-C2 engines, Hartzell HC-C2YF-1BF/F8459A -4 to -8, HC-C2YF-1BF/F8459A-4Q to -8Q, or McCauley 2A31C21/84S-4 to -8 propellers in accordance with Seaplane Flying, Inc. Assembly and Installation Instructions SF 20690, SF20821, or SF 20820, on Cessna Models 170A, 170B, 172, 172A, 172B through P, 175, 175A, 175B and 175C as defined in AML. 2.) Installation of Franklin 6A-350-C1R engines, Hartzell HC-C2YF-1BF/F8459A-4 to -8, HC-C2YF-1BF/F8459-4Q to -8, McCauley 2A31C21/84S-4 to -8 or 2A34C201/90DA-10 to -14 propellers in accordance with Seaplane Flying Inc. Assembly and Installation Instructions SF 20690 on Cessna Models 170A, 170B (Serial Numbers 20267 to 26504) as defined in AML.

FAA holder: Franklin Aircraft Engines Inc.

View record