Boeing is in the planning stages of converting its 737-800 passenger planes to freighters.
These freighters, said the company, would be primarily targeted at the express parcels industry.
Boeing already sells three types of dedicated freighter - the 767, 777 and 747-8 - and also passenger-to-freight conversions of the 767.
Its latest scheme to convert 737s followed soon after Airbus once again announced its own plans to convert its A320 aircraft – like the 737, a single-aisle passenger plane.
According to Reuters, Airbus has established a partnership with Singapore’s ST Aerospace after its earlier proposal for A320 conversions in alliance with Russian aviation interests “stalled on costs and jet values”.