Business Jet Technologies, the co-developer of the Quiet Technologies Stage 3 hush kit for the Gulfstream II/IIB, has launched avionics upgrade programs for the aircraft models based on the recent mandates for terrain awareness and warning systems (TAWS) and reduced vertical separation minimums (RVSM) equipment. The company has gained an STC for installation of the Sandel ST3400 TAWS in the GII/IIB and has announced an installed price for the system of about $84,000. That includes the ST3400 TAWS, Shadin 2000 air-data computer, Free Flight WAAS-capable GPS and installation kit.

The RVSM upgrade uses a J2 air-data computer and can be installed for $145,000. In most cases the package does not require replacement of the airplane’s original altimeters, according to the company. An STC for the RVSM upgrade package is expected this month, a spokesman said.