HOLLYWOOD, FLORIDA, February 22, 2017 - Quiet Technology Aerospace (QTA) has engineered a proprietary and terminating solution to a recently discovered problem of corrosion developing on the Inlet Cowl attachment Flange holes and the forward fastener line of the Inlets acoustic inner barrel.
Inlet Cowl Attachment Flange Corrosion
QTA has developed a proprietary repair procedure in lieu of replacement which is very affordable as well as terminating any chance of corrosion returning.
Corrosion being discovered by MRO technicians is found on the inlet cowl flange attachment holes, particularly in the six o’clock area of the fastener. While standard bushing repair is available, it does not always clean up corrosion around the hole edge. QTA’s proprietary repair both bushes the hole and eliminates corrosion along the edge. During the process, the flange is removed from the inlet and completely stripped. After the rework process, the flange is Alodine coated and primed to provide the best protection against further corrosion.
The bushings used are 15-5Ph so once the flange rework is completed, the corrosion does not return.
There are many advantages to QTA’s proprietary corrosion rework procedure.
- Substantial cost savings over replacing the flange.
- Exchange or rental cowls are available.
- If corroded beyond repair, QTA can still replace with new.
- Both reworks can be done simultaneously.
Once completed, continued airworthiness inspections are required per the Gulfstream Maintenance Manual Chapter 5.
Forward Fastener Line of the Engine Inlet Cowl Inner Acoustic Barrel
When corrosion is discovered, the dictated solution requires replacement of the alloy steel fasteners with monel; a group of nickel alloys, primarily composed of nickel (up to 67%) and copper, with small amounts of iron, manganese, carbon, and silicon that have high corrosion resistance.
In addition to the corrosion discussed, QTA engineering and DER staff has full capability for composite repairs on all GII/GIII/GIV and GV parts throughout the aircrafts systems. Composite specialties on Gulfstream aircraft for QTA include: Flight controls, Nacelles, Winglets, Fairings, Doors and Floorboards.
