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Engine and powerplant

STC SA3-674

FAA DRS lists SA3-674 as Current · Reissued, held by D'Shannon Products Ltd., for Cessna Aircraft 175, Cessna Aircraft 175A, and Cessna Aircraft 175B. Recorded change: Installation of Lycoming O-360-A1D engine and McCauley 2D36C14/78KM-4 or Hartzell HC-C2YK-1A/7666-2 propeller in accordance with Doyn Aircraft Drawing List for Model 1700 conversion dated May 6, 1964; for Cessna Model 175B: Atlas Aviation Oil Cooler Installation dated September 12, 1967, is required. Snapshot dated June 30, 2026.

FAA-listed holder
D'Shannon Products Ltd.
Aircraft configurations
3
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of Lycoming O-360-A1D engine and McCauley 2D36C14/78KM-4 or Hartzell HC-C2YK-1A/7666-2 propeller in accordance with Doyn Aircraft Drawing List for Model 1700 conversion dated May 6, 1964; for Cessna Model 175B: Atlas Aviation Oil Cooler Installation dated September 12, 1967, is required.

SA3-674 identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.

Applicability

Aircraft named in FAA DRS

Named aircraft: Cessna Aircraft 175, Cessna Aircraft 175A, and Cessna Aircraft 175B. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Cessna Aircraft 1753A17Cessna Aircraft 175A3A17Cessna Aircraft 175B3A17

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Cessna Aircraft 175 and Cessna Aircraft 175A, and 1 more aircraft configuration model, serial range, and configuration?
  2. 02Which powerplant configuration, limits, instruments, and maintenance data apply?
  3. 03Who can legally supply the design data, kit, instructions, and ICAs?
  4. 04What parts, labor, conformity, and return-to-service work are excluded?

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