Responsibility over the outage has been tossed between Meralco and airport management.
DOTC Secretary Joseph Emilio Abaya said that it was caused by drained battery that might have been poorly maintained, according to a GMA report.
Referring to NAIA-3 manager Octavia Lina's explanation, he said:
"Sabi niya may na-drain [na battery]. Hindi nagkick-in ang isang genset [generator set] natin. May drainage sa battery power... Hindi nag-transmit ng power sa building [NAIA-3] mismo."
(She said that there was a drained battery. One of the generator sets did not kick in. There was a drainage in the battery power. It didn't transmit power to the NAIA-3 building.)
However, a spokesperson from Manila Electric Company (Meralco) claimed that the outage was not their fault.
According to a separate GMA News report, spokesperson Joe Zaldarriaga said:
"Medyo kailangan nating i-clarify iyan. Tulad nga nang sinabi ko noong aming i-check ay hindi na ho Meralco side iyon."
Zaldarriaga also acknowledged that they a substation of the company actually tripped, but was restored in less than a minute.
The spokesperson said that the problem must have been on the "customer's loadside."
Zaldarriaga said: "Ang loadside, kung may bahay ka sa metering point that is the Meralco jurisdiction. Ang linya papasok sa loob ng bahay, that becomes the juristdicion of the customer."
At least 140 flights have been affected by a 5-hour power failure in NAIA-3, causing cancellations and delays that inconvenienced the passengers.
The power outage hit the airport at 8:45 pm, while power was restored at 2 in the morning, according to a report from Interaksyon.