What happened
On November 29, 2003, at approximately 0900 UTC, a Cessna 414 aircraft registered as ZS-LZD was involved in a ground incident at Rundu Airport in Namibia. The aircraft was operating under a private ferry flight arrangement, transporting two Angolan pilots from South Africa to Angola. The journey included a stop at Eros Airport for training purposes before proceeding to Rundu.
Upon arriving at Rundu, the crew prepared for departure toward Luanda. While taxiing toward the holding point for takeoff, the pilot reported that the left brake system was inoperative. This mechanical failure prevented the aircraft from maintaining directional control or stopping effectively. Consequently, the aircraft veered off the paved taxiway and entered a soft sandy area adjacent to the runway infrastructure.
As the nose landing gear sank into the loose sand, the structure failed under the stress, causing the nose gear to collapse. The downward movement of the fuselage resulted in both propellers striking the ground, leading to substantial damage to the aircraft's propulsion system and airframe. Fortunately, there were no injuries reported among the crew or any potential passengers.
The investigation
The incident was investigated by the Ministry of Works, Transport and Communication in Namibia. The inquiry focused on the sequence of events leading to the departure from the taxiway and the mechanical status of the aircraft at the time of the accident. Investigators examined the pilot's credentials, noting that while the commander held a Commercial Pilot License (CPL) with 2,400 hours of experience, he did not possess a valid South African license for this specific operation within Namibian airspace. Instead, the flight was conducted under a valid Angolan Pilot License.
The investigation established that the primary trigger for the incident was the inability to steer and stop the aircraft due to the left brake failure. The report also highlighted regulatory aspects regarding the validation of pilot licenses across international borders.
Findings
The loss of directional control during taxiing was the direct cause of the aircraft leaving the designated path. The inoperative left brake was a critical contributing factor that prevented the pilot from correcting the aircraft's trajectory. The subsequent collapse of the nose landing gear and damage to the propellers were direct results of the aircraft entering the soft terrain.
Additionally, the investigation noted regulatory concerns regarding the pilot's license validity for operating in Namibian airspace without proper validation from the aircraft's state of registry.
Safety action
The investigation report issued two primary safety recommendations. It advised that pilots must avoid taxiing at excessive speeds to maintain better control over their aircraft. Furthermore, it recommended that pilots ensure they hold valid validations from the aircraft’s state of registry before operating in foreign airspace, emphasizing the importance of regulatory compliance during international ferry flights.