U.S. transportation officials will hold a press conference in Washington at 0930 EDT (1430 GMT) to discuss issues related to recent electrical problems on Boeing 787, one person familiar with the matter told Reuters.

Bloomberg News said the U.S. Federal Aviation Administration (FAA) would announce a review into the jet’s power system at that news conference. U.S. regulators have raised questions about the plane’s reliability on long transocean routes, the Wall Street Journal reported.

In the latest in a series of incidents to test confidence in the new aircradt - an All Nippon Arways (ANA) Boeing 787 suffered a cracked cockpit window and an oil leak on separate flights in Japan on Friday.

ANA said a domestic flight from Tokyo landed safely at Matsuyama airport in western Japan after a crack developed on the cockpit windscreen, and the plane’s return to Tokyo was cancelled.

The same airline later said oil was found leaking from an engine of a 787 after the plane landed at Miyazaki airport in southern Japan. An airline spokeswoman said that return flight to Tokyo’s Haneda airport was also cancelled while the leak was investigated. No one was injured in either incident.

Earlier this week, a battery fire caused damage to an empty 787 jet operated by Japan Airlines (JAL) while it was on the ground at Boston airport. The next day, another JAL 787 spilled 40 gallons of fuel onto the taxiway at the same airport after a problem that caused a valve to open, forcing the plane to delay its departure. On Wednesday, ANA cancelled a domestic 787 flight due to a brake-control computer glitch.

Boeing’s top Dreamliner engineer, Mike Sinnett, was rolled out midweek to defend the 787, saying the plane’s problem rates were no higher than with Boeing’s successful 777 jet.

SPIDER WEB CRACK

ANA said crew noticed a spider web-like crack in a window in front of the pilot’s seat about 70 minutes into Friday’s flight, which was close to its destination.