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Aircraft STC directory

Cessna Aircraft 172Q STCs

The Jun 30, 2026 FAA DRS snapshot contains 92 selected supplemental type certificates with status Current whose public applicability data names the Cessna Aircraft 172Q. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

92
listed Current at snapshot
54
holder directories
11
modification categories
May 20, 2025
latest recorded revision

Modification demand surface

Other aircraft modifications36Avionics14Engine and powerplant9Flight controls9Landing gear and brakes6Cabin and interiors6Aircraft structures5Electrical systems3Fuel systems2Aircraft performance1Cargo and special mission1

Recorded holders

Knots 2U Ltd.5Aircraft Development Co5Brittain Industries, Inc3Selkirk Aviation3Athena Aircraft, LLC2Baumann Floats LLC2BAS Inc2D'Shannon Products Ltd.2Technisonic Industries Limited2S-TEC Corporation2Power Flow Systems Inc.1Curry Aviation LLC1Genesys Aerosystems Inc.1Flight Boss Ltd.1Ballistic Recovery Systems Inc.1PECO Inc1Airwolf Filter Corporation1McFarlane Aviation Inc1Griggs Aircraft Refinishing LLC1True Lock LLC1

Recently revised 172Q STCs

Showing the 92 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

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