Out of Service 2 : A fire fighting unit or special duty unit unable to answer its assigned calls due to accident, mechanical failure, engagement at a fire, or any other cause. See: Tied Up
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}