I understand the comments regarding use of the word "crash" and agree it isn't appropriate in this case. However, let's not get too hung up on it. The name of the show is 'Air Crash Investigation' not 'Air Incident Investigation' and plenty of the episodes cover non-crashes.
In other markets around the world the term "crash" isnt used in the name of the show. Mayday, Air Emergency, and Air Disasters are some of the other names. I guess the "crash" gets our attention more