Three years of US research has failed to find a replacement for Halon as an aviation fire-extinguishant, so the US Federal Aviation Administration has called for its continued use for aviation despite the fact that it is an ozone-depletant. Halon is used in aircraft-cabin fire extinguishers and as an engine and baggage hold fire-suppressant. Production of Halon ceased on 31 December, 1993 after 30 years. It is being recycled for aviation, and enough of it is believed to exist to satisfy demand beyond 2025.
Source: Flight International
