File Photo: EgyptAir bus and an EgyptAir plane are seen in Cairo international airport,, May 6, 2015 (AP)
Electric power resumed to Cairo International Airport's main air traffic control tower after a two-hour cut on Saturday night, during which auxiliary power was used.
Civil Aviation Minister Hossam Kamal visited the air traffic control tower early on Sunday after it had been repaired.
Ihab Mohi El-Din, head of the national company for air navigation, said that after electric power was cut at the main tower, auxiliary batteries and cables were used.
Following the power cut, air traffic control shifted to the auxiliary tower, though after two hours, the main tower started working again, according to a civil aviation ministry statement.
The civil aviation minister said that operating the auxiliary tower prevented delays during the power cut.
Kamal also said that a technical committee was formed to investigate the reasons for the power cut.
Mohi El-Din added that aerial transportation was not affected and that no considerable delay of flights was recorded.
However, Al-Ahram Arabic news website reported that 15 flights were delayed by 15 to 20 minutes, according to an unnamed source.
Guiding crewmen helped pilots at runways during the landing and takeoff of planes until the monitoring tower worked again, Ahram reported.
An informed source told Ahram Online that when the power was cut, only one frequency was working between the control tower and the pilots and an auxiliary battery was used.
The source added that during the 20-minute power cut, a guidance car was used to communicate with the landing planes using walkie-talkies, which made the landing process much slower.