For decades, halon-based fire extinguishers have been the gold standard in aviation fire suppression. Their effectiveness in confined spaces and minimal residue made them ideal for aircraft use. However, halons are also potent ozone-depleting substances (ODS), and their environmental impact has led to stringent international controls. Under EU Regulation 2024/590, halons are now largely banned, with limited exemptions for “critical use” in aviation. The Irish Aviation Authority (IAA) has issued Airworthiness Advisory Memorandum AAM 16 to remind pilots and owners of light aircraft of their obligation to remove hand-held halon fire extinguishers by 31st December 2025. This is the final deadline for portable halon extinguishers.
Aircraft owners and operators must:
- Identify any installed or portable Halon fire extinguishers in their aircraft.
- Arrange for the removal and environmentally recycling/reclamation of halon extinguishers. The EPA publishes a list of waste disposal companies.
- Replace them with approved, halon-free extinguishers suitable for aviation use.
- Update aircraft documentation (modification/alteration status, equipment list, Minimum Equipment List, if applicable) to reflect the change.
From 1st January 2026, carriage of halon extinguishers will be considered as a regulatory non-compliance. As such, CofAs, Flight Permits or ARCs may not be issued/renewed for an aircraft which has a portable halon fire extinguisher installed. IAA guidance is to consult your CA(M)O or maintenance organisation to find approved replacement options.
EASA and ICAO publications on halon replacement provide technical reference material for operators. In Ireland, the Environmental Protection Agency publications provide additional information regarding ozone-depleting halon.
