Aviation maintenance technicians routinely inspect aircraft composite honeycomb sandwich panels for core moisture ingress. During high-altitude flight, ambient temperatures drop significantly, creating a pressure differential that can draw atmospheric moisture into minute micro-cracks in the outer skin. When the aircraft ascends and descends repeatedly through freezing and warm conditions, trapped water undergoes continuous freeze-thaw cycles. This expansion gradually separates the composite face sheets from the internal honeycomb core, severely weakening the structural stiffness of flight control surfaces even when the exterior skin appears undamaged.
Based on the passage, which of the following conclusions is most logically supported?
- AMicro-cracks in the outer skin only develop when aircraft exceed standard operational cruise altitudes.
- Internal delamination can compromise a control surface's load-bearing ability before visible outer flaws appear.Answer
- CTechnicians must use ultrasonic pulse-echo testing to detect hidden moisture in honeycomb structures.
- DThe physical separation of face sheets from the honeycomb core triggers atmospheric moisture to enter the structure.
Answer
Internal delamination can compromise a control surface's load-bearing ability before visible outer flaws appear.
The conclusion that internal delamination can compromise a control surface's load-bearing ability before visible outer flaws appear is directly supported by the passage, which explicitly connects internal core separation and stiffness loss to situations where the exterior skin remains visibly intact.
Step-by-Step Solution
Key Concept
Distinguishing Supported and Unsupported Inferences
Estimated Time:1m 5s