Synopsis
On 19 February 2023, a Reims Aviation SA Cessna F172N, registration EI-GWU, was conducting a local training flight from Birr Airfield (EIBR), Co. Offaly, Ireland. During the takeoff roll on Runway 18, the instructor observed that the aircraft was not accelerating as expected and the engine sounded quieter than usual. The instructor instructed the pilot to abandon the takeoff. The pilot closed the throttle, both crew members applied the brakes, but the aircraft overran the runway end and impacted a boundary hedge. The aircraft sustained minor damage; no injuries were reported and no fire occurred.
Flight History
Before the flight, the instructor arrived early, walked the runway, and noted wet shoes. The instructor performed a pre-flight walkaround, started the engine, and taxied to the fuel pump. After refueling to full tanks, the pilot—a new club member with a Private Pilot Licence but no Cessna 172 experience—completed a pre-flight walkaround under instructor supervision. The crew then briefed on cockpit instruments and speeds for takeoff, climb, and glide.
The engine started normally. After taxiing to a point abeam Taxiway B, the crew conducted power checks. The pilot applied carburettor heat for about three to four seconds and observed an expected rpm drop. The instructor then visually confirmed the carburettor heat control was fully cold and the ignition was set to both magnetos. The pilot completed pre-takeoff checks and extended flaps to 10 degrees. The instructor gave a Threat and Error Management briefing, including actions for an aborted takeoff.
The aircraft lined up on Runway 18 with some crosswind correction. Applying full power, the takeoff run began. The instructor initially felt normal acceleration but later noted the aircraft was not becoming airborne by the usual position abeam the windsock. The tachometer indicated 2,000–2,100 rpm and airspeed stagnated between 50 and 55 knots. The pilot confirmed full throttle. At approximately 190 metres from the boundary hedge, the instructor called for abandonment. The pilot closed the throttle, the instructor pulled the mixture, and both applied brakes. The aircraft began decelerating but insufficient runway remained; it entered rough ground and struck the hedge.
Injuries
No injuries were reported to the investigation.
Crew Statements
The instructor had flown EI-GWU for about twenty hours prior. He tested fuel for water and particulate three times (in hangar, at pump, and after refueling); all samples were clear. He accessed a meteorological briefing and was aware of conditions. He noted the aircraft skidded on wet grass after brake application and that he wore his seat belt but not shoulder harness. He was mindful of carburettor icing risks.
The pilot stated he had no prior Cessna 172 experience. He confirmed the throttle was fully forward before aborting and that the aircraft hit the hedge at a slow speed. After the excursion, the crew contacted the club’s Chief Flying Instructor. The pilot took photographs of the aircraft. A witness reportedly remarked that it seemed the aircraft took a long time before starting the takeoff roll.
Investigation
The Air Accident Investigation Unit (AAIU) was notified by the operator shortly after the event. Photographs were provided, and the aircraft was recovered to a hangar. The next day, two inspectors deployed to the site to commence the investigation.