What's happening to AA flt 3005 unscheduled landing at DEN from STL to SLC regular flight? What's particular to this flight?

Here it is:

Airline American
Flight Number 3005
Departure City (Airport) Denver, CO (DEN)
Departure Time 12/28/2002 08:28 PM
Arrival City (Airport) Salt Lake City, UT (SLC)
Arrival Time 12/28/2002 09:32 PM
Remaining Flight Time 00:28
Aircraft Type McDonnell Douglas MD-80 Series
Current Altitude 35,000 feet
Current Groundspeed 464 mph
Flight Status In Flight

Airline American
Flight Number 3005
Departure City (Airport) Saint Louis, MO (STL)
Departure Time 12/28/2002 06:39 PM
Arrival City (Airport) Denver, CO (DEN)
Arrival Time 12/28/2002 07:31 PM
Remaining Flight Time 00:00
Aircraft Type McDonnell Douglas MD-80 Series
Current Altitude 0 feet
Current Groundspeed 0 mph
Flight Status Arrived

Thanks,

Big777jet