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Aircraft STC directory

Cessna Aircraft 172L STCs

The Jun 30, 2026 FAA DRS snapshot contains 141 selected supplemental type certificates with status Current whose public applicability data names the Cessna Aircraft 172L. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

141
listed Current at snapshot
81
holder directories
13
modification categories
May 20, 2025
latest recorded revision

Modification demand surface

Other aircraft modifications54
Engine and powerplant18
Avionics18
Flight controls11
Aircraft structures9
Landing gear and brakes7
Cabin and interiors7
Propellers5
Fuel systems5
Aircraft performance2
Cargo and special mission2
Electrical systems2
Safety and emergency equipment1

Recorded holders

Aircraft Development Co5Curry Aviation LLC4Brittain Industries, Inc4Knots 2U Ltd.4Del-Air4Selkirk Aviation3Honeywell International Inc3Power Flow Systems Inc.2Outpost X Aviation Inc.2Athena Aircraft, LLC2Air Plains Services Corporation2Baumann Floats LLC2RAM Aircraft Limited Partnership2Airwolf Filter Corporation2Dynamic Propeller2BAS Inc2D'Shannon Products Ltd.2J P Instruments2Garmin AT Inc.2Penn Yan Aero Service Inc2

Recently revised 172L 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