faa failed to properly test boeing 787's lithium-ion batteries, ntsb says - li ion battery cell
NEW YORK --
The government failed to properly test lithium from Boeing 78 7.
A new report says there is too much reliance on ion batteries and on Boeing's technical expertise.
S. National Transportation Safety Commission on Thursday criticized the process by the Federal Aviation Administration for certification of the new aircraft in 2007.
It also suggested that the FAA need to seek technical advice outside the aviation industry.
The report is in direct conflict with the internal study released by the FAA, which states that the agency "has developed effective procedures to identify and correct problems that arise before and after certification. "}The 787 -
Also known as Dreamliner
It was the first commercial aircraft to rely on rechargeable lithium.
Ion batteries that power key systems.
The battery is lighter and the airline can save fuel.
However, on January 2013, a fire broke out in a car 787 parked at the gate of Boston, and the temperature and pressure of one of the batteries rose beyond control, called heat out of control.
No one was injured except the fire.
Smoke condition on another plane nine days later
Led to the dream aircraft fleet landing in the world.
After the Google cloud service was interrupted, Harris Boeing redesigned the ventilation system around the battery and the plane resumed its flight.
Now there are 140 Dreamers running around the world.
The airline ordered another 891. }
The safety committee said in a report on Thursday that the problems could be traced back to September 2004, when Boeing first told aviation regulators that it planned to use lithium-
Ion batteries on 787.
The FAA was forced to create the first
Requirements for the use of lithium-
Ion batteries on commercial jets.
One of the nine requirements put forward by the FAA is "lithium-
Ion batteries must be excluded from
Temperature or pressure increases continuously and uncontrolled.
"In other words, there is no heat loss.
When Boeing and the FAA worked together in March 2006 to establish a certification test, they thought that a battery fire could cause smoke, but according to the safety board, "Boeing underestimated the more serious impact of the internal short circuit.
"On January 2007, the FAA approved the test plan proposed by Boeing.
It does not include the test of this short circuit.
In order to avoid this oversight again, NTSB recommends that the FAA, when approving a new technology, need to seek expertise outside the aviation industry.
For example, DOE has conducted extensive tests on lithiumion batteries.
If the FAA had already contacted the Department of Energy or other experts, the FAA could have recognized that its tests were "insufficient to properly assess the risk of a short battery circuit," the report said ".
The safety committee recommends that the FAA review its lithium-
Ion battery testing process.
In addition, any new technology certification should involve "independent and neutral experts outside the FAA and aircraft manufacturers ".
"The FAA has 90 days to respond.
Boeing issued the following statement on Thursday: Although the original lithium of 78 7 was tested
Ion batteries during certification with a wide range
Recognized industry standards at that time, with the progress of knowledge, aircraft certification standards should and will indeed develop.
So when we review NTSB's specific proposal for FAA, we support efforts to ensure lithium certification standards
The ion batteries reflect and contain these advances.
We are prepared to work with NTSB and other affected stakeholders when the FAA considers the specific proposal of NTSB.
We have noticed that Boeing has enhanced its 787 lithium-
Ion batteries passed a rigorous certification test before 787 resumed use last year, including a test that was completely consistent with NTSB's proposal today.
Therefore, we remain confident in the safety and integrity of a comprehensive battery solution developed by Boeing and approved by the FAA last year.