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Engine and powerplant

STC SA5423SW

FAA DRS lists SA5423SW as Current · Reissued, held by RAM Aircraft Limited Partnership, for Cessna Aircraft 340 and Cessna Aircraft 340A. Recorded change: Modification of engine cooling air louvres on top of cowling. Snapshot dated June 30, 2026.

FAA-listed holder
RAM Aircraft Limited Partnership
Aircraft configurations
2
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

SA5423SW 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 340 and Cessna Aircraft 340A. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Cessna Aircraft 3403A25Cessna Aircraft 340A3A25

Buyer checks

Confirm before sourcing

Related engine and powerplant STCs

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.

View record