Originally Posted by
Old Coder
It's an easy mistake to make - ABB instead of ABV - those are adjacent keys on a qwerty keyboard...
Unfortunately ops use ICAO codes. But you could be on the right lines. Abuja (ABV) is ICAO code DNAA, while Asaba (ABB) is DNAS. And A and S are adjacent on a western keyboard. Fly2Sky, the actual operator, is however based in Sofia, Bulgaria, where Cyrillic keyboards are standard, so further potential for a confusion of two adjacent keys in a non-native language.