When Dom is starting up the Bell JetRanger that he is killed in, the close up of the rotor head is not that of a JetRanger and looks more like that of a 222.
In the pilot episode of the original series Shadow of the Hawke (1984), it is said that St. John has been MIA in Vietnam for fourteen years. In this episode, it is said that St. John was MIA for two and half years before was rescued by the Company, then a year ago he volunteered to a rescue mission which failed and was captured by the Khmer Rouge.
When Airwolf blows Blackjack (a black SA341G Gazelle) out of the sky, the exploding wreckage is a red and white Hughes/MD-500.
Jo comes out of the left side of Airwolf after landing it in the lair. Airwolf and Bell 222's are piloted from the right seat.
The sounds being used most of the time for Airwolf are that of the SA341G Gazelle.
When Airwolf is coming up out of the lair, the hand on the collective is that of Mr. Hawke, recognized by his watch.
When Mr. Hawke is in the hospital room, a ventilator can be heard. Mr. Hawke is not hooked up to any sort of ventilator equipment.
All of the planes seen around Santini Air have C-number registrations, which are Canadian, meaning this would not be the Van Nuys airport which this is supposed to be taking place.
No explanation is given to Caitlin's absence.