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Aircraft STC directory

Cessna Aircraft 170B STCs

The Jun 30, 2026 FAA DRS snapshot contains 80 selected supplemental type certificates with status Current whose public applicability data names the Cessna Aircraft 170B. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

80
listed Current at snapshot
45
holder directories
12
modification categories
Apr 1, 2025
latest recorded revision

Modification demand surface

Other aircraft modifications22
Engine and powerplant14
Avionics8
Flight controls7
Aircraft structures6
Fuel systems6
Propellers5
Landing gear and brakes5
Cabin and interiors4
Electrical systems1
Aircraft connectivity1
Safety and emergency equipment1

Recorded holders

Del-Air3International Cessna 170 Association3PK Floats Inc3Steve's Aircraft3Stene Aviation Inc3D'Shannon Products Ltd.3Curry Aviation LLC2Avidyne Corporation2Brittain Industries, Inc2Airglas Inc.2Great Lakes Aero Products Inc2BAS Inc2Stoots Aviation/David A. Stoots2Acron Aviation Inc.1F.Atlee Dodge Aircraft Services1Athena Aircraft, LLC1McFarlane Aviation LLC1Kaman Corporation Aircraft Wheel and Brake LLC1Genesys Aerosystems Inc.1Baumann Floats LLC1

Recently revised 170B STCs

Showing the 80 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA3-13Engine and powerplant

Install 170 hp Lycoming O-340-A1A engine and Hartzell HC-82XL-1DB/8433-12 propeller according to Doyn data listed on Engineering Releases 100 (3/22/58), 1010 (3/16/57), 1011 (8/28/57), 1012 (7/15/57), 1014 (3/30/57), 1050 (7/13/57), 1051 (& DCN 1, 12/10/57), 1052 (7/19/57), 1053 (7/19/57), 1099 (3/22/58), and Instructions (2 sheets, undated) Data required for parts manufacture: As listed on Engineering Releases 1001 (1/18/57), 1002 (12/21/57), 1003 (5/1/57), 1004 (7/13/57), 1005 (7/12/57), 1006 (3/30/57), 1007 (4/12/57), 1008 (2/27/57), 1009 (10/23/57), 1015 (2/25/56).

FAA holder: D'Shannon Products Ltd.

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SA3-672Engine and powerplant

Installation of Lycoming O-360-A1A, A1D, or B1B engine with McCauley 2D36C14-X/78KM-4 propeller or Lycoming O-360-A1A and A1D engines with Hartzell HC-C2YK-1A/7666A-2 propeller. Data required: Doyn Aircraft, Inc. Drawings: 1000, 1005 Rev. C, 1006 Rev. C, 1009, 1010 Rev. A, 1011, 1012 Rev. A, 1013, 1014, 1015, 1016, 1099, 1100 Rev. B, 1101 Rev. A, 1102, 1103 Rev. A, 1104, 1107, 1150. Drawing Changes Notices: 1005-5A, 1006-8A, 1006-6, 1009-2A, 1199-1A, 1199-2A, and 1199-3A.

FAA holder: D'Shannon Products Ltd.

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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.

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