Acoustic panel repair with retention of acoustic properties
AssigneeRohr, Inc.
InventorsChia Huat Teo, Chong Yaw Wee
Life of this patent
Estimating the term…
Abstract
An acoustic panel (200) for an aircraft nacelle (100) may comprise a perforated first skin (220), a second skin (230), and a core (210) sandwiched between them. A damaged portion of the perforated first skin may be removed. A fiberglass ply (510) may be coupled to the acoustic panel. A pressure differential may cause the fiberglass ply to form dimples (515) within the perforations (325) of the first skin. The fiberglass ply may be used as a template to drill holes in a replacement patch (400).
Claims19
A method of repairing an acoustic panel for an aircraft nacelle comprising:
- coupling a fiberglass ply to the acoustic panel;
- creating dimples in the fiberglass ply using a differential pressure, wherein the dimples are located within first perforations in the acoustic panel;
- coupling the fiberglass ply to a replacement patch;
- and
- drilling second perforations in the replacement patch.
A method of repairing an acoustic panel comprising:
- removing a damaged section of the acoustic panel;
- laying up a plurality of composite plies into a replacement patch on a bond tool;
- coupling a maskant to the replacement patch;
- blasting first perforations in a core portion of the replacement patch;
- placing a fiberglass ply on the acoustic panel;
- creating dimples in the fiberglass ply corresponding to second perforations in a top skin of the acoustic panel;
- transferring the fiberglass ply to the replacement patch;
- sanding off the dimples;
- drilling third perforations in a ramp section of the replacement patch;
- and
- coupling the replacement patch to the acoustic panel.
A method of repairing an acoustic panel comprising:
- removing a damaged portion of a perforated skin on the acoustic panel;
- forming a patch to fit in place of the damaged portion, wherein the patch comprises an overlap area with the perforated skin;
- perforating the patch to match a perforation pattern on the perforated skin;
- aligning the patch on the acoustic panel such that first perforations in the patch are aligned with second perforations in the perforated skin;
- and
- bonding the patch to the acoustic panel;
- comprising coupling a fiberglass ply to the acoustic panel;
- comprising creating dimples in the fiberglass ply using a differential pressure, wherein the dimples are located within the second perforations.
17-18. (canceled)
Dependencies are inferred from the claim text.