Fatal Piper PA 28-181 Crash Near Nordhorn-Lingen

Incident Overview and Flight Details On 24 September 2004, a Piper PA 28-181 aircraft departed Twente, Netherlands, at 19:24 local time, bound for Nordhorn-Lingen to conduct night flight training. The aircraft landed at 19:45, refueled, and completed three touch-and-go circuits. At 20:39, the aircraft took off from runway 24 with a flight instructor, a student pilot, and the previous pilot as a passenger. The final landing with a go-around was recorded at 20:47. When no radio contact was established approximately eight minutes later, the flight leader requested a position report, which went unanswered. A witness noted the aircraft turned early into the crosswind departure for the southern circuit. The last primary radar contact was recorded at 20:41 in the southeastern circuit by the Bremen radar system. The aircraft was located around 23:00 by triangulating its emergency locator transmitter (ELT) in a forest area southwest of the airfield. All three occupants were killed. ## Aircraft and Meteorological Conditions The Piper PA 28-181 was a single-engine, four-seat low-wing aircraft with a fixed nose gear, powered by a Lycoming O-360-A4A piston engine. It was airworthy with a total operating time of 7,187 hours, and maintenance records showed no defects affecting airworthiness. The calculated takeoff weight was approximately 200 lb below the maximum takeoff weight, with the center of gravity within limits. Weather at the airfield included 8/8 cloud cover at 1,000 ft, 10 km visibility in darkness, occasional rain, wind from 270° to 310°, and a pressure of 1,014 hPa. The German Weather Service reported multilayered clouds with a main base at 1,000 ft, occasional cloud fragments at 400 to 700 ft, and a dew point spread of 1 to 1.5 °C. Moderate rain with embedded thunderstorms occurred in the accident area until 20:00, with shower activity only south of a line from Enschede to Osnabrück at the time of the accident. A witness reported a heavy rain shower between Nordhorn and the airfield with severely reduced ground visibility. ## Wreckage and Findings The accident site was in a large forest area approximately 700 m southwest of the end of runway 24. The first tree contact was made with the right outer wing. The debris field indicated a spread direction of 150° after the initial contact. About 50 m later, a massive tree contact occurred where the right wing and main gear hung in a tree at 8 to 10 m height, changing the debris spread direction to 100°. The fuselage with the nose gear came to rest approximately 75 m from the first tree contact. All major components, control surfaces, and necessary parts were found at the site. Fuel was present in the line to the carburetor. The throttle was in the full throttle position, and the mixture control was in the rich position. The carburetor heat was on. The tachometer indicated 2,300 rpm at impact. The propeller was sheared off the crankshaft flange. Microscopic examination of light bulbs showed current flow at the time of impact. The flap lever was in the 40° position, which was likely due to the crash impact that destroyed the linkage and tore off the wings and flaps. No fire occurred. ## Human Factors and Conclusions The flight was a night circuit training exercise. The student pilot, who lacked night rating, sat in the left seat, with the flight instructor, who held a night rating, in the right seat. The first three circuits were flown by the passenger, who held a commercial pilot license and instrument rating. The student pilot had a private pilot license without instrument rating and was on his first night flight instruction. Under marginal conditions, he was likely overwhelmed by the demands of tight circuits, with little time for handling, observations, and corrections. Altitude could only be maintained by instruments due to the lack of a visible horizon. It could not be determined whether the flight instructor flew or intervened in the controls. The weather was marginal for night VFR flight, with multilayered clouds causing darkness without horizon visibility. Rain and low dew point spread suggested significant fog above the forest south of the airfield. High humidity and precipitation on the windshield further reduced visibility. The aircraft was equipped for night and instrument flight, with no technical defects indicated. The BFU concluded the accident was caused by conducting the night flight in questionable weather conditions and an unnoticed altitude loss leading to tree contact.