Hollywood, Florida-based Quiet Technology Aerospace (QTA; Booth I51) has obtained an FAA supplemental type certificate for its solution to thrust reverser corrosion on Honeywell HTF7000 turbofans. According to QTA, the STC will enable a repair of the corrosion problem at a considerably reduced cost versus replacing entire units.
Affected Honeywell engines power several super-midsize jets, including the Bombardier Challenger 300/350/3500, Gulfstream G280, Embraer Legacy 450/500 and Praetor 500/600, and Cessna Citation Longitude. The STC applies to all models apart from the Longitude, although this will be added later.
Currently, operators with corrosion problems are faced with a costly thrust-reverser door replacement and also the side beams if they are out of limits. QTA’s permanent solution takes the existing 7075 aluminum alloy door and remanufactures it with a titanium aft section that replaces the corroded area. For affected side beams, the existing units are given a new titanium skin. The remedial kit does not affect the inner mold line or exit area and comes with a lifetime structural warranty that automatically transfers if the aircraft changes hands.
This week at EBACE, QTA is displaying a thrust-reverser door along with its carbon-fiber engine inlet barrel that also eliminates corrosion problems. The company holds STCs for fitment of the barrels on the Challenger 300/350/3500; Learjet 60/60XR; Falcon 2000EX/LX; Gulfstream G200/280 and G450; Embraer Legacy 400/500 and Praetor 500/600; and Hawker 1000. More than 350 of these barrels are in service globally.