Sideral Air Cargo (Curitiba International) is planning to take delivery of an ex Air One (Rome Fiumicino) B737-400(F) (N309MS, MSN 24906) currently being prepared at Curitiba International. As mentioned previously, the Brazilian cargo carrier was originally due to take delivery of its B737-400(F) (MSN 24529, PR-ADX) in May last year, to add to its current sole B737-300(F), but this, however, never materialized.