Delta flight diverted due to unruly crew
 

Unusual to divert due to the crew being unruly, usually it is a passenger.
The captain of Delta Airlines flights DL2598, flying from Los Angeles to Minneapolis, requested a diversion to Salt Lake City.
A passenger reported that 3 cabin crew were removed from the aircraft due to bad behaviour before the flight continued on to Minneapolis.
Delta sent an letter of apology.

From The Aviation Herald. Only reference to the incident I could find.

http://avherald.com/h?article=492cfc53&opt=0