PRO FOOTBALL

NEW ORLEANS (AP) — The cause of a 34-minute blackout at the Super Bowl remained under investigation, but public records showed that Superdome officials were worried about a power outage several months before the big game Sunday night.

An Oct. 15 memo released Monday by the Louisiana Stadium & Exposition District, which oversees the Superdome, said tests on the dome’s electrical feeders showed they had “some decay and a chance of failure.”

The memo also said 2011 blackouts that struck Candlestick Park, where the San Francisco 49ers were playing a nationally televised Monday night football game, was one reason for ordering the tests. The state board later authorized spending nearly $1 million on Superdome improvements, including more than $600,000 for upgrading the dome’s electrical feeder cable system.