No mandate for TCAS, TAWS on VLJs

Although very light jets (VLJ) will be operating at the same altitudes (including RVSM airspace) as and mingling with airliners and larger business jets, there is no requirement that the small jets be equipped with TCAS or TAWS because they do not meet the minimum seat configuration as spelled out in Parts 91 and 135. However, some VLJ manufacturers plan to offer such systems as standard or optional equipment, and STCs for retrofits are also expected to be offered by service facilities.