As we reported earlier this year, a former Irish Air Corps Spitfire (158), registration G-BMSB, was involved in a forced landing in Kent, following an engine failure during a Safety Standards Acknowledgement and Consent (SSAC) passenger flight on 3rd May this year. The aircraft, flying in formation with another Spitfire, experienced a sudden engine vibration and rapid power loss approximately 35 minutes into the flight. The pilot, suspecting a fuel issue due to a strong smell in the cockpit, initiated a controlled glide and executed a successful wheels-up landing in a field. The aircraft sustained damage to the propeller, engine cowling, right radiator, and wing skin. The pilot was unharmed, while the passenger suffered minor bruising.
The cause of the power loss was traced to a failed gasket in the fuel pressure warning switch attached to the carburettor. The degraded gasket, likely due to age, allowed pressurised fuel to leak into the engine bay and be drawn into the air intake, resulting in an excessively rich fuel mixture and engine malfunction. The switch was over 70 years old, with no known overhaul history.
In response, the UK Civil Aviation Authority (CAA) issued Safety Notice SN-2025-009, urging operators of historic aircraft to inspect and maintain ageing fuel and hydraulic system components, particularly tertiary switches that may be vulnerable to age-related degradation.
The pilot’s decision-making and energy management were commended, particularly his choice to keep the landing gear retracted to preserve glide performance and his coordination with the accompanying aircraft for radio communications. His regular practice of emergency procedures and participation in “What if?” scenario discussions were credited with contributing to the safe outcome.
Aircraft History: Spitfire IXT G-BMSB / 158
Spitfire G-BMSB is a two-seat trainer variant (Mk IXT), originally manufactured in 1943 with serial number CBAF 7722. It served with the Irish Air Corps as ‘158’ as part of the post-war fleet and was one of the aircraft used for training and ceremonial duties. After its military service, it was restored and entered civilian operation, becoming a popular aircraft for heritage flights and public displays.
