Maintenance and Modifications
Stage III hush kits revived
Hush kits developed by Stage III Technologies for Rolls-Royce Spey-powered Gulfstreams are back.

Hush kits developed by Stage III Technologies for Rolls-Royce Spey-powered Gulfstreams are back. Here at NBAA’08, the new owner of the design, Hush Kit Aviation, LLC, is exhibiting the first installation of an FAA-certified, Stage III hush kit on a Gulfstream II in the static park at Orlando Executive Airport.

Noise requirements at many airports around the world prohibit or restrict the use of aircraft, such as the original Gulfstream IIs and IIIs, that are qualified to no better than the Stage 2 noise-level standard. The addition of engine hush kits to such aircraft can qualify them to operate at airports that require meeting Stage 3 noise-level limits.