hangar queen

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun idiomatic, slang, military, aviation A grounded aircraft which is kept so that its parts can be used in other aircraft.
• noun idiomatic, slang, aviation An aircraft which requires a great deal of regular maintenance and has an unfavorable ratio of maintenance time to flight time.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an airplane with a bad maintenance record