What specification must aircraft plywood adhere to?

Aircraft plywood must adhere to specific industry standards to ensure safety, performance, and reliability in aviation applications. MIL-P-6070 is the military specification that outlines the requirements for aircraft-grade plywood, which includes criteria for its physical properties, strength, and durability. This specification is crucial because it defines the standards that plywood used in aircraft must meet, ensuring that the materials can withstand the demanding conditions of flight, such as varying temperatures, humidity levels, and mechanical stresses.

The other options do not represent the correct specification for aircraft plywood. Instead, they may pertain to different types of materials or standards that are not specifically related to plywood used in aviation. Understanding these specifications helps ensure that the materials chosen for aircraft construction are suitable for safety and performance requirements in aviation settings.