My first thought is are you identifying yourself correctly?
Rohr produced a FAA Stage 3 Type Designator Notice for STC SA4363NM
FAA Publication N7110.183 established the "B72Q" as the type for all stage 3 model aircraft operating in the US.
I have seen a few enter 727RE, 727REW plus other variations as designators and this can cause a few issues
See Rohr Operator Service Letter OSL-727RE-025
Questions or concerns regarding this subject the contact is below not sure if they are still good as they are quite a few years old now and I haven't played with an REW in anger since 2007:
Juan Cortes
Fleet Manager 727 REW Programme
619-691-2935
[email protected]