In Service - Aircraft is in active service with an operator.
Stored - Aircraft is parked for a long term. Not actively flown, but is being maintained in a serviceable condition.
WFU - Withdrawn From Use. Mostly intact, possibly used for parts.
Derelict - Aircraft has either been abandoned/neglected by the owner. Ownership my be unclear.
Being Modified - Aircraft is undergoing substantial structural or interior modifications.
Being Repaired - Aircraft is in heavy maintenance or is being substantially repaired.
Scrapped - Airframe and/or wings have been broken apart. Little or no substantial parts of aircraft remain.