Skip to content
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.

Share
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

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

FAA record reference

STC number
SA5423SW
Product
Aircraft · Small Multi-Engine
Country
United States
Application date
March 17, 1983
Revision date
October 8, 2001
CFR references
Part 3, Part 21