Fuselage Skin Corrosion
On April 3, 2007 a Westwind operator reported a cabin decompression due to a fuselage skin panel failing, the cause was severe corrosion. It was corroded in multiple places in the chemically milled areas hidden under the Insulation/Noise/Vibration Damping Pads.
A thorough inspection of adjacent fuselage skin panels and bulkheads was completed noting that the corrosion was contained to only the one panel which is located at the top aft portion of the fuselage between Fuselage Station 219.05 and Fuselage Station 269.87.
Please refer to the FAA AC 43-4A “Corrosion Control for Aircraft” document for details related to corrosion prevention.
A follow up investigation of the event is underway and if any fleet action is required it will be communicated accordingly
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