Nairobi, Aug. 23 -- At least 90 planes belonging to private aviation companies, flying schools and individuals have been abandoned at Nairobi's Wilson Airport, choking available parking space for operational aircraft and costing the Kenya Airports Authority (KAA) revenue.

An audit of the country's second-busiest airport by aircraft movements found that the abandoned aircraft have caused congestion, forcing flight diversions.

It is unlikely that any of the planes will fly again, and KAA has struggled to auction the aircraft in recent years as they accumulate significant parking fees.

The light planes include Cessna 402, Fokker 50, Beechcraft Baron 58, and slightly larger passenger planes such as Bombardier CRJ100s and Dash-8s.

Some are...