Aeronautical Engineers, Inc. (AEI) has announced that Saltillo, Mexico-based Aeronaves T.S.M. S.A. de C.V. (TSM) has ordered four additional AEI B737-400SF freighter conversions.

This order follows the announcement of two more AEI B737-400SF freighter conversions ordered by TSM in early March. Upon completion of this order, TSM will operate a total of seven AEI B737-400SF freighter conversions.

Production slots and aircraft MSNs for this order have yet to be announced. However, all modification labour will be performed by the authorised AEI Conversion Centre, Commercial Jet in Dothan, Alabama.

The B737-400SF remains a popular freighter product offering for AEI. Since program launch, the company has redelivered over 120 freighter conversions, 7 were redelivered in 2020.