There’s an FCC rule that states:
"This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation."
So if the FCC compliant equipment isn’t actually complaint, or the FCC’s compliancy specifications aren’t up for the job. Either way, this is an FCC issue really. And if their specification is tight enough then they ought to be checking that the masts or planes equipment is actually compliant.