Incident Details
On 7 September 2001 at 1614 hours UTC, a Piper PA-38-112 (registration G-BYMD) was conducting an aerial work training flight from Shoreham Airport. The take-off run on Runway 25 was normal, with the student handling the controls. At approximately 100 to 200 feet above ground level, the engine began to surge and cut out repeatedly. The instructor took control, confirming that the fuel pump was on, selecting a different fuel tank, and ensuring full throttle. These actions did not improve the engine's condition. The instructor broadcast an 'engine failed' message to air traffic control, selected a suitable field, and executed a successful forced landing. The aircraft sustained no damage, and the occupants were not injured. After the aircraft came to rest, the engine continued to run at idle.
Investigation Findings
Following recovery, maintenance personnel found that the retaining nut for the gascolator (fuel filter) bowl had failed due to stripped threads. The failure likely allowed air to enter the fuel system at high power settings, causing the observed power fluctuations. At idle throttle, sufficient fuel flow was maintained. The instructor noted that the aircraft had flown only about 13 hours since its last annual check, and that the nut could not be visually inspected during a normal pre-flight inspection.
Aircraft and Crew Information
The aircraft was a 1982-model Piper PA-38-112 powered by a single Lycoming O-235-L2C piston engine. The commander held a Commercial Pilot's License with a Flying Instructor Rating, was 35 years old, and had 587 hours total flying experience (133 on type). No injuries or damage occurred.