What happened
On November 13, 1998, a Grumman American Aviation AA-5 was conducting a VFR flight from Bonn-Hangelar to Juist. The aircraft was occupied by the pilot and two passengers. As the flight progressed northward, weather conditions significantly deteriorated. After finding that landing at Juist was impossible due to the low visibility, the pilot decided to divert to the Leer-Papenburg airfield, a location with which he was familiar.
Upon contacting the duty flight information service at Leer-Papenburg, the pilot was informed that weather conditions were unsuitable for VFR operations and that the tip of a 525-foot radio tower, located south of the airfield, was not visible. Despite this warning, the pilot expressed his intention to attempt an approach, stating that he would return to Bonn-Hangelar if the approach proved unsuccessful. Shortly thereafter, the aircraft, approaching from the west, collided with the tower at an altitude of approximately 230 feet. The impact caused the aircraft to crash into a stable building on a nearby farm, where it subsequently caught fire. The collision resulted in three fatalities.
The investigation
The BFU investigation was conducted on-site, though the high degree of destruction caused by the post-impact fire limited the scope of the examination. The pilot, who was also the owner of the aircraft, held a valid private pilot license with night flight and controlled VFR privileges, supported by approximately 1,045 total flight hours.
Meteorological analysis revealed that the flight took place during the passage of an occluded front, which brought rising temperatures and precipitation to the region. This weather system caused cloud bases to drop below 500 feet across the area. At the time of the accident, visibility at Leer-Papenburg was approximately 1,500 meters, with cloud ceilings between 200 and 250 feet. Radar data from German and Dutch authorities confirmed the aircraft's flight path through the clouds over the Netherlands before the accident.
Findings
- The pilot had received weather briefings prior to departure that warned of deteriorating conditions to the north, but he determined the conditions were sufficient for the flight.
- The aircraft was flying in instrument meteorological conditions (IMC) while operating under VFR.
- The pilot failed to divert to an appropriate airfield with better weather conditions in a timely manner.