The AEI Boeing 737 freighter conversion with side fuselage loading door open.
Photo Credit: AEI

AEI Receives Malaysian Approval for its B737-800SF Freighter Conversion

LONDON – Aeronautical Engineers, Inc. (AEI) was pleased to announce a further national approval for its freighter conversion. The Civil Aviation Authority of Malaysia (CAAM) has approved AEI’s Supplemental Type Certificate (STC) for the 12-pallet position Boeing B737-800SF freighter conversion.

A growing list of international STC approvals


The latest approval by Malaysia adds to the growing list for international approvals for the US engineering firm’s conversion kit.

AEI has so far gained FAA, CAAC, EASA, TCCA, UK CAA, CAACI (Cayman Islands) DCA (Guernsey), ANAC and now CAAM approvals for its B737-800SF.

AEI is currently the only conversion company to have ETOPS 180 approval on the 737-800 freighter conversion. Additionally, AEI can convert all 737-800 line number aircraft including those with Flat Aft Pressure Bulkheads, and Split Scimitar winglets.

About the Freighter conversion


The Aeronautical Engineers Inc. B737-800SF Cargo Conversion consists of the installation of a 86″ x 137″ cargo door on the left side of the fuselage, and modification of main deck to a Class E cargo compartment.  

After conversion the aircraft can carry eleven 88″ x 125″ AAA full height containers or pallets plus one AEP/AEH, with pallet weights up to 9,000 lbs. AEI’s B737-800SF is now ETOPS 180 approved.

​AEI’s cargo door has earned a reputation of being the most robust and reliable in the conversion industry.  The cargo door is hydraulically operated and actuated from the inside of the aircraft by a independent system.  

Hydraulic pressure is available from two sources: a 28VDC electrically operated hydraulic pump or a manual hand pump.  The door control and manual pump are located on the 9g barrier, allowing a single person to operate the door manually.

The AEI converted B737-800SF freighter offers a main deck payload of up to 52,700 lbs. (23,904 kg) and incorporates eleven full height 88” x 125” container positions, plus an additional position for an AEP/AEH.

The conversion also incorporates new floor beams aft of the wing box, and the large Main Cargo Door with a single vent door system.

AEI’s forward-thinking design allows for containers to be loaded into the aircraft a full 16.5” aft of the forward door jamb, ensuring ground operators have sufficient maneuvering room which minimizes potential door and aircraft strikes.

Additionally, the AEI B737-800SF includes a flexible Ancra Cargo Loading System, a rigid 9g barrier, five supernumerary seats as standard, a galley, and full lavatory.

About AEI


Aeronautical Engineers, Inc. (AEI) is a global leader in the aircraft passenger-to-freighter conversion business and is the oldest conversion company in existence today.

Since the company’s founding in 1958, AEI has developed over 130 Supplemental Type Certificates (STCs) and has modified over 550 aircraft with the STCs.

AEI helps its customers extend aircraft life and increase the overall value of aircraft assets by continuously focusing on dependable and flexible product offerings.

AEI currently offers passenger-to-freighter conversions for the Boeing 737-800, 737-400, 737-300, MD-80 series, and CRJ200 aircraft

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