crash landing

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An emergency landing by an aircraft or spacecraft.

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

• noun The landing of an aircraft or spacecraft in an emergency, either in an inappropriate place or under dangerous circumstances

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

• noun an emergency landing under circumstances where a normal landing is impossible (usually damaging the aircraft)