US agencies clear Boeing 787 Dreamliner test flights: Report
- IPL spot-fixing case: Actor Vindoo Dara Singh arrested
- IPL 2013 LIVE SCORE: Mumbai Indians continue to lose wickets
- Pune Warriors withdraw from IPL, 'disgusted' by BCCI's attitude
- IPL spot fixing: Accused Sreesanth claims innocence
- Li Keqiang visits TCS, Cyrus P Mistry says China important for growth of Tata Group
Thec (FAA) has allowed Boeing to carry out flight tests of its 787 Dreamliner in order to help it check its troubled electrical system and batteries which is suspected to be the root cause of battery fire in one of its planes last month.
The entire Dreamliner fleet had been grounded ever since the January 7 incident.
In a statement late yesterday, the FAA said these flight tests will allow Boeing to gather additional data.
"These test flights will be an important part of our efforts to ensure the safety of passengers and return these aircraft to service," Transportation Secretary Ray Lahood and FAA Administrator Michael Huerta said in a joint statement.
They said the primary purpose of the test flights will be to collect data about the battery and electrical system performance while the plane is air-borne.
These test flights, however, will be subject to a number of restrictions including extensive pre-flight testing and inspections and in-flight monitoring in order to ensure
the highest levels of safety.
The flights will be conducted in defined airspace over unpopulated areas, they said.
Earlier in the day the National Transportation Safety Board (NTSB), which is carrying out probe into incident, said it has zeroed down on the root cause.
NTSB Chairman Deborah Hersman said the flight data recorder data showed the battery voltage had unexpectedly dropped from a full charge of approximately 32 volts to approximately 28 volts.
This drop is consistent with the charge voltage of a single cell, she said.
"Based upon findings from the examinations and identifying thermal and mechanical damage, we believe that the evidence points to a single cell as the initiating event," she said.
Hersman said the short-circuit was caused in cell number six of the battery which was the root cause of the fire.
- 'Sophisticated' Indian cyberattacks targeted Pak military sites: Report
- Talkative Li quoted Weber, Hegel, Jobs, said PM is large-hearted
- Bihar food corp ends up with chaff as rice worth Rs 535 cr vanishes from mills
- In 7 lucrative minutes on May 9, Sreesanth bowled 6 balls, bookie made Rs 2.5 cr
- India and China ask border envoys to work on more steps
- Former Ranji player among 3 more held