Factual error: Season 9 Episode 5, "Touchdown": When they approach the aircraft carrier, the copilot says that the number two engine is flaming out. This means there is no more fuel to run that engine. That supposedly also means that there is not enough fuel for a fire alarm lighting up in the cockpit, which is what happens in the show. (Verified by a USMC Staff Sergeant who flew 8 years on a C130).
Factual error: During the approach on the aircraft carrier, they had to put out the gear manually. The copilot shouts that she has three greens (meaning that all gears are down and locked), then she puts the gear lever up. If that is done, the gear would raise again or be in an unsafe position for the landing.
Factual error: When they have to jettison fuel during their final approach to the aircraft carrier, Rabb tells his co-pilot to dump 200 pounds of fuel. That is about 30 Gallons (about two normal car tanks). But there is way too much fuel being dumped to be only 30 gallons.
Factual error: In the opening scene the caption states "Antwerp, Belgium Diamond District", however, the street show is actually located in Amsterdam, The Netherlands. The building at the end of the street is the "Rijksmuseum" (famous for Rembrandt's "Nachtwacht"). Furthermore, the 2 diamond experts speak German. If it was in Antwerp, they should have been speaking Dutch or Flemish.
Answer: Officially, the individual has been ordered to attend, failing to could be interpreted as either, Failure to follow orders, dereliction of duty, going AWOL, or even desertion. It would depend on the underlying reason as to why the person doesn't appear.