On 8 July 2019, a loud bang was heard following intermediate flap selection on a Boeing 747-400F making an approach to Harare and a concurrent uncommanded right roll was countered with left aileron. The flight was completed without further event but a post-flight inspection found part of the inboard section of the right wing flap assembly was missing and the right fuselage impact-damaged in several places. The missing flap section measuring 3.7 metres by 0.6 metres was recovered with detachment attributed to undetected fatigue cracking already present at component installation. A long history of problems with 747 flaps was noted.