A FlyArystan Airbus A320-200 on behalf of Air Astana, registration P4-KBD performing flight KC-7201 from Atyrau to Almaty (Kazakhstan), was climbing out of Atyrau when the crew stopped the climb at about 8000 feet and returned to Atyrau due to a problem with the avionics cooling. The aircraft landed safely back in Atyrau.
Kazakhstan's Civil Aviation Authority reported the crew received an "avionics cooling valve does not work" indication. Maintenance performed deactivation actions according to MEL and released the aircraft to perform the flight. No investigation was opened.
The aircraft departed again about 3:45 hours after first departure.