An Egypt Air Airbus A320-200, registration SU-GCB performing flight MS-855 from Cairo (Egypt) to Khartoum (Sudan), was climbing out of Cairo when the crew stopped the climb at FL230 after the right-hand engine (V2527) stalled several times associated with a failure indication for the EEC2. The aircraft returned to Cairo for a safe landing on runway 05R about 30 minutes after departure.
A passenger reported the aircraft was climbing through estimated FL220 when the aircraft lurched several times, the right-hand engine produced sounds as if it was oscillating between power and below idle. The captain later indicated the right-hand engine had stalled. The passengers were supplied with drinks and cookies, about two hours later a Boeing 737 departed to Khartoum.
A replacement Boeing 737-800 registration SU-GCR departed Cairo about 3.5 hours after SU-GCB landed and reached Khartoum with a delay of 3.5 hours.
The occurrence aircraft returned to service after about 28.5 hours on the ground.