US National Transportation Safety Board (NTSB) chairman Deborah Hersman said assumptions made by Boeing and FAA to justify certifying 787 batteries “must be reconsidered.” (atwonline.com) More...
Wow ! What a statement . And the following comments by concerned readers. Wonderful . every word , be of NTSB Chairman or of my peer readers , all confirm my approach and attitude that must be adopted as a future course of action . Remember when man flew by a balloon for the first time . First it was Hydrogen , being lightest gas . This caused fire accidents . Then Helium , an inert gas lighter than air . And later , to present , hot air balloons ! Assumptions kept changing in flying by balloons for obvious reasons . Failures or less than required out put results make us to investigate or revisit design parameters including performance related assumptions about systems or sub system . " To scale " prototypes pose interesting problem . Error in performance is highly magnified in the full scale model . Any engineer worth his salt knows that . It can be 'square' of the quantity , or 'cube' or/and cumulative effect of all these " squares and cubes " ! All persons involved in the design and manufacture of any thing and every thing from proverbial ' needle to ship ' must take lessons from these incidents .
Did you ever see a lithium battery in a laptop burn up? It burns at a white hot temperature and pretty much out of control. Even a Nicad battery will go balistic once it reaches a critical temperature. A battery overtemp in my commercial aircraft was an emergency item. If it could not be controlled--land as soon as possible.
Yeah and the ground fire fighters were no better..makes you wonder what they they actually do for training. This was in Japan...not some far flung slab of an airport.
NTSB Update: NTSB Determines Origin of 787 Battery Fire, Faults FAA for Improper Test Results
The National Transportation Safety Board announced on Thursday that the fire in a parked Japan Airlines Boeing 787 Dreamliner on January 7 started in one cell, which showed multiple signs of short-circuiting. This led to a thermal runaway condition that caused the fire then spread to other cells.