Skip to content

Aircraft STC directory

Cessna Aircraft 340 STCs

The Jun 30, 2026 FAA DRS snapshot contains 64 selected supplemental type certificates with status Current whose public applicability data names the Cessna Aircraft 340. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

64
listed Current at snapshot
33
holder directories
10
modification categories
Apr 1, 2025
latest recorded revision

Modification demand surface

Other aircraft modifications32
Engine and powerplant9
Fuel systems7
Propellers5
Aircraft performance4
Avionics3
Cargo and special mission1
Aircraft structures1
Landing gear and brakes1
Cabin and interiors1

Recorded holders

RAM Aircraft Limited Partnership20FFC Manufacturing3SMR Technologies Inc2MT- Propeller Entwicklung GmbH2Ontic Engineering and Manufacturing Inc.2Acron Aviation Inc.1Michelin North America Inc.1Seaton Engineering Corp.1Air Comm Corporation1OCR Aviation1P2 Incorporated1Griggs Aircraft Refinishing LLC1Paul/ Lanna Egan LLC1Aircraft Components Inc1Spoilers Inc1Sharon K. Brent1Straight Flight Inc1D'Shannon Products Ltd.1Lord Corporation1Scandinavian Avionics Design GmbH1

Recently revised 340 STCs

Showing the 64 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA2346SW-DOther aircraft modifications

Option 1: Install Teledyne Continental Motors Model TSIO-520-J engines (310 horsepower). Option 2: Install Teledyne Continental Motors Model TSIO-520-N or NB engines (310 horsepower) and McCauley or Hartzell propellers. Option 3: Install Teledyne Continental Motors Model TSIO-520-NB engines modified by Supplemental Type Certificate number SE4327SW (325 horsepower) and McCauley or Hartzell propellers.

FAA holder: RAM Aircraft Limited Partnership

View record
SA01420WIAvionics

Installation of Garmin GNS 430A / 530A COMM/NAV/GPS Systems. Data required: (1) Scandinavian Avionics Design GmbH Drawing List 2027438-DL-02, Issue 2; or later EASA approved revisions. (2) Scandinavian Avionics Design GmbH Approved Aircraft Flight Manual Supplement, Doc. 2027438-AM-02A, Issue 1, and Doc. 2027438-AM-02B, Issue 2, both approved by EASA under approval No. EASA.A.S.01389 dated 07-09-2005, or later EASA approved revision.

FAA holder: Scandinavian Avionics Design GmbH

View record
SA4158NMOther aircraft modifications

Option 1: Installation of American Aviation, Inc., intercooled engines as modified by Supplemental Type Certificate (STC) SE4159NM in accordance with American Aviation Inc. Top Drawing List TDL 063, dated July 8, 2002, or later FAA approved revision. A copy of American Aviation Inc. Approved Flight Manual Supplement (AFMS), dated May 1, 2003, or later FAA approved revision must be carried in the modified aircraft. Option 2: This installation may be installed with cowl scoops only in accordance with American Aviation Inc. Top Drawing List TDL 063, dated July 8, 2002, or later FAA approved revision. No AFMS is necessary for this option. NOTE: This approval includes Cessna 340 series aircraft previously modified per the following STC s: SA1881SW, SA2346SW, SA4241SW, SA7365SW, SA7382SW, and SA8604SW.

FAA holder: American Aviation Inc

View record