TOKYO: A probe into the overheating of a lithium ion battery in an All Nippon Airways Boeing 787 that made an emergency landing found it was improperly wired, Japan’s Transport Ministry said Wednesday.
The Transport Safety Board said in a report that the battery for the aircraft’s auxiliary power unit was incorrectly connected to the main battery that overheated, although a protective valve would have prevented power from the auxiliary unit from causing damage.
Flickering of the plane’s tail and wing lights after it landed and the fact the main battery was switched off led the investigators to conclude there was an abnormal current traveling from the auxiliary power unit due to miswiring.
The agency said more analysis was needed to determine what caused the main battery to overheat and emit the smoke that prompted the Jan. 16 emergency landing of the ANA domestic flight and the worldwide grounding of Boeing 787 jets. They said they are consulting Boeing about the issue.
The Federal Aviation Administration and aviation authorities in other countries grounded 787 fleets because of the ANA incident, which followed a battery fire earlier in January in a 787 parked in Boston.
The 787, dubbed the Dreamliner by Boeing, is the first airliner to make extensive use of lithium ion batteries, which are lighter in weight, charge faster and contain more energy than conventional batteries similar in size. However, the batteries also are more prone to overheating and catching fire.
Japan probe finds miswiring of Boeing 787 battery
Japan probe finds miswiring of Boeing 787 battery
Philippines builds defense partnerships amid growing China aggression
- Island country forged new pacts with Japan, the UAE, Canada, Germany in past year
- Manila sees China’s maritime expansion as ‘quintessential security threat,’ expert says
MANILA: The Philippines and Japan have signed a new defense pact, adding to a growing list of security cooperation Manila has been forging with partner countries as it faces a growing Chinese presence in the disputed South China Sea.
Philippine-Japan security ties have strengthened in recent years over shared concerns in the region, with the two countries signing a landmark military pact in 2024, allowing the deployment of their forces on each other’s soil for joint military drills. It was Japan’s first such pact in Asia.
The new defense agreement — signed by Philippine Foreign Secretary Theresa Lazaro and Japanese Foreign Minister Toshimitsu Motegi in Manila on Thursday — is a follow-up to their 2024 pact, and would allow tax-free, reciprocal provision of ammunition, fuel, food and other necessities when their forces conduct joint training and disaster relief operations.
The security partnership is aimed at boosting deterrence against China, experts say.
“The latest defense pact with Japan is not only significant but also existential (as) a strong deterrence to China’s growing military size and ambition in the string of islands of the first island chain that includes Japan and the Philippines,” Chester Cabalza, founding president of the International Development and Security Cooperation think tank, told Arab News.
The Philippines, China and several other countries have overlapping claims in the disputed South China Sea, a strategic waterway through which billions of dollars worth of goods pass each year.
Beijing has maintained its expansive claims of the area, despite a 2016 international tribunal ruling that China’s historical assertion to it had no basis.
Japan has a longstanding territorial dispute with China over islands in the East China Sea, while Chinese and Philippine coast guard and navy ships have been involved in a series of tense incidents in the South China Sea in recent years.
“The imminent threat to maintain a status quo of peaceful co-existence in the region brings a shared responsibility for Manila and Tokyo to elevate strategic partnership to achieve this strategic equilibrium,” he said.
Motegi said he and Lazaro “concurred on continuing to oppose unilateral attempts to change the status quo by force or coercion in the East and South China seas,” in a clear rebuke of Beijing’s increasing assertiveness, without naming China.
The Philippines sees China’s maritime expansion as “the quintessential security threat,” said international studies expert Prof. Renato De Castro.
“So, of course, we rely on our efforts to build up our armed forces in terms of the comprehensive archipelagic defense operation,” he told Arab News.
The Philippines has a mutual defense treaty with the US, which the allies signed in 1951. While both governments have continued to deepen defense cooperation in recent years, Manila has also been building security partnerships with other countries.
The Philippines has signed two defense deals this month alone, including a Memorandum of Understanding on Defense Cooperation with the UAE, its first such deal with a Gulf country.
Last year, Manila signed military pacts with New Zealand and Canada, which sets the legal framework to allow military engagements, including joint drills, in each other’s territory. Both agreements still need to be ratified by the Philippine Senate to take effect.
The Philippines also signed a defense cooperation arrangement with Germany in May, aimed at boosting joint activities.
