The Transmission Company of Nigeria said it is already addressing the blackout in parts of Abuja, including Aso Rock and the Nnamdi Azikiwe International Airport.
A statement by Ndidi Mbah, TCN’s spokesperson, on Saturday, said the outage was due to faults with the red and yellow phase 33kV bushings of the 100MVA power transformer in its Apo substation.
According to TCN, the red phase bushing has been resuscitated, while work is ongoing on the yellow phase. 
TCN urged the Abuja Electricity Distribution Company to take supply for customers on the outgoing 33kV feeders connected to the affected 100MVA transformer at Apo Substation.
“Presently, the red phase bushing has been resuscitated, while work is ongoing on the yellow phase.
“In view of this incident, TCN has requested that Abuja Electricity Distribution Company, AEDC, take supply for customers on the outgoing 33kV feeders connected to the affected 100MVA transformer at the Apo Substation from other TCN feeders within its franchise area pending completion of repairs.
“Our engineers are working assiduously to restore the transformer and sincerely apologise for the inconvenience the incident has caused AEDC and electricity customers fed from the affected feeders,” TCN stated.
Recall that parts of the nation’s capital, including the State House, Nnamdi Azikiwe International Airport, and other areas, have been thrown into darkness.
