Well I certainly didn’t anticipate writing about Boeing’s 787 problems two days in a row but it’s impossible not to do so in the wake of the eye-popping developments last night.
For those who haven’t yet heard, All Nippon Airways and Japan Airlines yesterday grounded their 787 Dreamliner fleets — collectively 24 aircraft in all and nearly half of all 787 deliveries made so far — in the wake of an emergency landing by an ANA flight at Takamatsu airport in western Japan.
ANA said the aircraft’s pilots received a cockpit message indicating battery problems. A burning smell was additionally detected in the cockpit and cabin. All 129 passengers and eight crew members evacuated safely using the emergency slides.
The episode comes in the wake of a decision last Friday by the FAA to conduct a review of the airliner and its certification after a litany of problems, many of them related to the lithium-ion battery technology the aircraft. Here’s a link to a comprehensive list of recent snags from Britain’s Telegraph newspaper.
Boeing last night tweeted this response: “We’re aware of the ANA 787 diversion in Japan. We will be working with ANA and the authorities to determine what happened and why.”
That the batteries once again appear to have caused a problem is striking. As I wrote in yesterday’s post, the airplane makes use of battery technology in place of hydraulics as a weight-saving measure (the weight saving is one of the reasons the airplane is said to be 20 per cent more fuel efficient than other aircraft of its size). I came across a tweet today from Stephen Trimble (@FG_STrim), an aviation reporter and editor at flightglobal.com, who says a 787 lithium battery caught fire in 2006 and — ehem — burned down an office building.
By the way, here’s a picture, in a story written by Stephen Trimble, released by the NTSB in the U.S., showing the charred battery box from an incident last week involving a JAL flight at Boston’s Logan Airport. Clearly the battery was on fire.
I received training on extinguishing Lithium-ion battery fires when I was a flight attendant. They’re commonly used as a power source for laptop computers and cell phones. When a li-ion battery has what’s called a thermal runaway and overheats, the result is nasty. And cell phone batteries have had precisely these kinds of runaways on aircraft before. In fact there was one in 2011 in Australia. Temperatures can go as high as 1,110 F. The important first response is to cool the battery using water.
More from twitter: Josh Newman (@joshuan542), who is studying to be an AME in the UK, sent me a message pointing out that ANA and JAL use the same maintenance company. Worth noting, given the majority of the 787 problems have come from those two airlines. That said, those two airlines also have more of the aircraft than any other operator thus far.
By the way, Air Canada has ordered 37 787s so far. Here’s a link to a list of 787 customers.
No one at this point would be surprised if the entire 787 fleet was grounded until the FAA completes its review. Increasingly, it would appear the FAA made a prudent decision last week and it’s important for Boeing to respond as openly and transparently as possible and not simply assert the airplane is safe. Clearly it’s not quite.